shake table under 10000

seismic performances of precast segmental column under bidirectional earthquake motions: shake table test and numerical evaluation - sciencedirect

Shake table tests were carried out on the precast segmental concrete column.Bidirectional earthquake motions were used as inputs.The fundamental vibration period of the segmental column varied less than the monolithic column.Obvious twisting occurred to the segmental column subjected to bidirectional ground excitations.The developed numerical model could capture the responses of the segmental column.

Precast segmental concrete column, as one of the prefabricated structures used to accelerate the construction speed in the urban areas with heavy traffic, has been more and more widely used recently. Current applications of such structures are mainly limited to the low seismicity areas due to the lack of knowledge on its seismic performances. Recently, extensive research efforts have been made to understand the force-displacement relationship of such columns under quasi-static cyclic loading through experimental and numerical investigations. The behaviours of the column under real dynamic earthquake motions were, however, rarely investigated. Moreover, only the uniaxial motion was considered in the limited shake table tests of such columns despite earthquake excitations have three components in reality. This study carries out shake table tests on the seismic performances of precast segmental concrete column, and bidirectional earthquake motions were used as inputs. For comparison, the behaviours of the traditional cast-in-situ monolithic column were also experimentally investigated and compared with the segmental column. Interestingly, the experimental results showed that significant twisting occurred to the segmental column under the bidirectional earthquake motions. To prevent the adverse twisting response, shear keys between the segments are proposed. The effectiveness of the proposed method is demonstrated through numerical simulations after the model is validated by the experimental results.

rewards - shakepay legal

If you have a Shakepay account, you will have access to a unique code and/or URL which includes the unique code (the Referral Code) that allows you to refer a friend to Shakepay, and earn rewards (the Referral Program). All relevant sections of the Terms of Use shall apply, including but not limited to definitions, the warranty and the limitation of liability sections. Shakepay reserves the right at any time to modify, suspend or cancel the rewards, the use of Referral Codes or participation in the Referral Program or the ShakingSats Program for any or all Shakepay customers, at its sole discretion and without prior notice.

You may share your Referral Code in any manner you deem appropriate, as long as you conform to this section. You may share the Referral Code through various sharing functions of your mobile device, your website, share it through email or other communication means, or embed it in graphical advertisements (Ads). Shakepay reserves the right, at its sole discretion, to demand the cessation of your use of any Ad, whether it violates a prohibition in this section or not. You shall be responsible for ensuring that your Ads do not violate or infringe upon any laws or the rights of any third party. We will not be responsible for any use of the Referral Code in your Ads. You may use the Shakepay name and logo only in the context of your use of the Referral Code or creation of Ads, and in conformity with all the obligations in this section and any other rules communicated to you.

promote, advocate or include violence, racial intolerance, gambling, illicit drugs, hacking or other nefarious technological activity, illegal activity or infringement on the legal rights of others; and,

Shakepay shall track the use of the Referral Code and attribute any new customer that signs up to Shakepay using your Referral Code (the Referee). In order for you and the Referee to have access to the ShakingSats program (the ShakingSats Program) and its rewards (the ShakingSats Rewards), the following must occur:

you (and the Referee) can now open the Shakepay mobile app and shake your device (seriously, shake it!). A message will pop up in the Shakepay mobile app when you have successfully earned the ShakingSats Reward.

ShakingSats Rewards are given once per calendar day. On the first day, you will be on Day 1 in the ShakingSats Rewards Table below, and if you shake your device you will be rewarded with the Day 1 ShakingSats Reward. If you shake again on the next day, you will be rewarded with the Day 2 ShakingSats Reward. And so on until you reach Day 201. If you continue to shake after Day 201, you will earn the Day 201 ShakingSats Reward for each additional day you keep shaking. If you fail to shake your device on any day calendar day (Eastern Time), the next time you shake your device you will come back to Day 1 and the Day 1 ShakingSats Reward.

Additionally, a one-time reward (the Referral Reward) shall be credited into both your and the Referees account within 5 business days of the purchase by the Referee of digital currency worth $100 CAD or more, in one or multiple transactions. If the Referee signs up between December 1, 2020 EST and April 15, 2021 EST, the Referral Reward will be of $30 CAD, if the $100 CAD purchase by the Referee is done within a maximum of 30 days after signing up. If the Referee signs up on or after April 16, 2021 EST, or before December 1, 2020 EST, the Referral Reward will be of $10 CAD. If the Referee signs up between May 11, 2021 EST, and May 18, 2021 EST, the Referral Reward will be of $30 CAD, if the $100 CAD purchase by the Referee is done by or before May 18, 2021 EST. You may earn many Referral Rewards, one for every Referee that purchases in digital currency the equivalent of $100 CAD or more. In order for you and the Referee to have access to the Referral Reward, the Referee must indicate your Referral Code during their account creation process, or must contact Shakepay support team up to a maximum of 30 days after the creation of their account.

You have a chance to win $1,000 CAD worth of sats (for Canadian Residents excluding Quebec) by referring a friend to Shakepay! Each day until August 7th, 2021, well be doing The Daily Referral Giveaway. Were looking forward to helping Canadians earn free bitcoin.

Every day our system will automatically select a winner. The winner will be randomly picked from a list of participants who referred a friend (where the friend signed up on the day preceding the drawing of participants) and who meets the eligibility criteria according to the Daily Referral Giveaway Rules.

How will I know if I have won? If you are the winner and use the Shakepay app, you will receive an in-app message from the Shakepay team. If you don't have the Shakepay app set up, you will receive an email from the Shakepay team from [emailprotected].

The team will let you know youve won and ask your permission to share your shaketag publicly. If you consent to this, it will be announced on both Shakepays Discord community and on the official Shakepay Twitter page.

You can also see the number of friends youve referred in the settings screen under the My Referrals section of the app. Tip: check to see if your number of sign ups increased after your friend signed up. Please note that in order to be eligible to participate in The Daily Referral Giveaway your friend only needs to complete sign up (by providing their full legal name, date of birth, current residential address, occupation, and verifying their phone number and email address, and fulfilling any other requirements for registration). Your friend doesnt have to buy anything from us and its free to become a user of Shakepay.

This means if you sign 5 friends up in one day you will receive 1 entry for The Daily Referral Giveaway. If you sign up 5 friends during 5 days (1 friend per day) you are entered into The Daily Referral Giveaway each of those 5 days!

Quebec has unique legislation that restricts the ability of companies to giveaway valuable property (like Bitcoin) in the Province of Quebec. As a Quebec-based corporation, we wish we could open this up to everyone and we may in the future be able to do so, but for now, The Daily Referral Giveaway is only open to Canadians outside of Quebec in order for us to be compliant with Quebec law.

Every day starting July 10th, the winner will be announced on both Shakepays Discord community and the official Shakepay Twitter page once they have been selected. If you are selected as the daily winner, your prize will be added to your Shakepay account within 24 hours (once all of the requirements are met).

Were a registered Money Services Business so please note that prior to receiving your prize you will be asked to confirm your current residential address and answer a skill-testing question. You might also be asked to submit a Proof of Address document if needed.

The The Daily Referral Giveaway (the Contest) will be conducted daily starting at 00:00:01 AM Eastern Time (ET) on July 9th, 2021, (the Contest Opening Date and Time) and closes on August 7th, 2021, at 11:59:59 PM Eastern Time (the Contest Closing Date and Time). The Contest is brought to you by and operated by Shakepay Inc. (Shakepay or Sponsor), 500 Place d'Armes #1800 Montreal, QC, Canada, H2Y 2W2, with its Website at


The Contest is open to all residents of Canada who have reached the age of majority in their province or territory, and have a valid Shakepay account (including a Shakepay Username) and completed the registration on their Shakepay account. Notwithstanding the foregoing, residents of the Province of Quebec cannot enter and cannot participate in this Contest. Additional entry requirements may be found in the HOW TO ENTER section below.

Anyone who meets the eligibility criteria and has made a valid Entry (as defined in the next section) in the Contest shall be deemed a Participant in these Contest Rules. The entirety of this section as well as any additional entry requirements found in the Section 2 below may be referred to as the Participant Eligibility Criteria.

You must have a Shakepay account to enter. If you do not have a Shakepay account go to or download the Shakepay: Buy Bitcoin Canada application from either the Google Play Store or the Apple App Store to create one.

The friend (or more than one) you invite must sign up to Shakepay and must complete account registration (by providing their full legal name, date of birth, current residential address, occupation, and verifying their phone number and email address, and fulfilling any other requirements for registration).

There is a maximum of one Entry per person per day. You are eligible to participate in the Contest every day as long as you meet requirements and have a valid Shakepay user account that complies with your legal obligations as a user. Entries indicating the same user details will be considered, for purposes of the Contest, to belong to the same Participant and therefore is subject to this restriction. Any excess Entries will be invalid for purposes of the Contest draw. If you attempt or are suspected of attempting to invite a friend who already has a Shakepay account or any entry methods not authorized by these Contest Rules, it shall be deemed as tampering and shall void any and all of your Entries.

The Prize(s) are granted in Satoshis (Sats). One Sats is 0.00000001 bitcoins. Every day there will be a Prize of $1,000 CAD worth of Sats. The value in Sats of each Prize will be calculated at the time of awarding the Prize, using the then current Shakepay conversion rate. Thus, the value in Sats may vary accordingly.

Every day, starting July 10th, 2021, a random winner will be picked from a list of the Participants. The winner will then need to answer a skill-testing question in order to qualify for the awarding of the Prize, and you must answer the question correctly. You must and warrant that you will answer the question without the assistance of any other person.

If the winners agree, their shaketag (username) will be shared publicly on the official Shakepay Discord community and the official Shakepay Twitter page (and any other website or app used by Shakepay). Winners will be announced each day, starting July 10th, 2021. The Winner will also receive a message from the Shakepay team in the Shakepay app. If the Winner does not have the Shakepay app set up, they will receive an email from [emailprotected].

The Winner must confirm their current residential address prior to receiving the Prize. We expect every Winner will confirm their address but a Winner who does not complete this requirement (and the skill-testing question) within 30 days will be deemed not to be a Winner, and no Prize will be awarded for that day. Being announced as a Winner by Shakepay is not sufficient to be awarded a Prize as all of the Contest Rules must be complied with before any Prize shall be awarded.

If the Winners address is up to date and matches the address on the Winners Shakepay account, the Winner will receive a Prize based on their residency. If the Winners address is changed from either non-Quebec to Quebec residency, or Quebec to non-Quebec residency, the Winner must submit a Proof of Address prior to receiving the Prize. Notwithstanding the foregoing, determination of residency shall be in Shakepays sole discretion and its decision regarding residency shall be final.

If a winner does not respond within seven days following the first attempt of contact, refuses to provide their current residential address, or declines the Prize, the Prize shall be forfeited and Shakepay shall have the right, at its sole discretion, to select another Winner for that day or pick an additional Winner for another day (but it is not obligated to do so).

If an individual Winner has fulfilled all the obligations described in this section and fulfills the Contest Eligibility Criteria, their Prize will be transferred to their Shakepay account within 24 hours.

5.1. PROOF OF ADDRESS. Winners will be required to provide their current residential address and might be asked to provide a Proof of Address in case the provided address doesnt match the address on the Winners Shakepay account (or otherwise triggers our review process, which is a part of our anti-money laundering program as a registered Money Services Business).

A Proof of Address must show the Winners name (i.e.your name) and address clearly. The Proof of Address shall be conducted in such a way that it meets or exceeds the standards established by Canadian anti-money laundering law, but the process chosen shall be at Shakepays sole discretion and may vary according to the circumstances.

5.3. FREE TO ENTER, NOT RESPONSIBLE FOR LOSSES OR HARM. Shakepay is not responsible for any loss, harm, damages, cost or expense arising out of participation in the Contest, participation in any Contest-related activity or the acceptance, use, or misuse of any Prize, including but not limited to costs, injuries, losses related to personal injury, damage to, loss or destruction of property, rights of publicity or privacy, defamation, or portrayal in a false light, or from any and all claims of third parties arising therefrom.

5.4. INDEMNIFICATION. By entering the Contest, Participant releases and holds Releasees (directors, officers, employees, and contractors of Shakepay, and Shakepay itself) harmless from any and all liability for any injuries, loss or damage of any kind to the Participant or any other person, including personal injury, death, or property damage, resulting in whole or in part, directly or indirectly, from acceptance, possession, use or misuse of any Prize, participation in the Contest, any breach of the Contest Rules, or in any Prize-related activity. The Participant agrees to fully indemnify Releasees from any and all claims by third parties relating to the Contest, without limitation.

5.6. DISQUALIFICATION. Illegal or dishonest activity is grounds for disqualification. If a Participant makes a false statement or otherwise violates these Contest Rules (or any legal terms applicable to their Shakepay account), they shall be disqualified from the Contest. Any action that violates, infringes, or misappropriates any rights of any third party including, without limitation, patent, copyright, trademark, trade secret, or right of privacy or publicity shall also subject a Participant to disqualification from the Contest. Any disqualification under these Contest Rules shall be at Shakepays sole discretion.

5.7. LIMITATION OF LIABILITY. Since were giving away Sats and theres no purchase necessary, we wont accept any liability. The Releasees assume no liability for any loss, damage or injury, including without limitation: (i) lost, stolen, delayed, damaged, misdirected, late, destroyed, illegible or incomplete Entries; (ii) loss, theft, or damage to software or computer or telephone data, including any breach of privacy; (iii) fraudulent calls or emails; (iv) inability of any person to participate in the Contest for any reason including technical, computer or telephone malfunctions or other problems with computer systems, servers, access providers, computer equipment, or software; technical difficulties with Shakepay, or any combination of the foregoing; (v) damage to any persons computer or device, including as a result of playing or downloading any material relating to the Contest; (vi) any delay or inability to act resulting from an event or situation beyond their control, including a strike, lockout or other labour dispute at their location or the locations of the organizations and businesses whose services are used to administer this Contest (including but not limited to Shakepay); or (vii) use of a Prize or any losses or damages arising from any activity related thereto.

5.8. CANCELLATION OF CONTEST. Fairness is important to us. Shakepay reserves the right to cancel or suspend this Contest should a virus, bug, or other cause beyond its reasonable control corrupts the security or proper administration of the Contest. Any attempt to deliberately affect the Website or to undermine the operation of this Contest is also a violation of the rules of the Contest. Should such an attempt be made, Shakepay reserves the right to seek remedies and damages to the fullest extent permitted by law.

5.9. PRIVACY AND USE OF PERSONAL INFORMATION. Shakepay respects your privacy. By participating in the Contest, you: (i) grant to Shakepay the right to use your Shakepay shaketag (username) to administer the Contest, including but not limited to contacting and announcing the Winner and awarding Prizes; (ii) grant to Shakepay the right to use Personal Information for publicity and promotional purposes relating to the Contest, in any and all media now known or hereafter devised, without further compensation unless prohibited by law. Shakepay will only use the Participants Personal Information for identified purposes. For more information regarding the manner of collection, use and disclosure of Personal Information by the Sponsor, please refer to the Shakepay Privacy Policy at By providing the information in the Entry, you as a Participant consent to it being used for the purposes as stated in the Privacy Policy.

5.10. DISPUTES REGARDING THE WINNERS ACCOUNT. If a Winners account is subject to Shakepay's risk management and security protocols that include limiting access to, suspending, or closing a Winners account, they shall be automatically disqualified from the Contest. Any disqualification under these Contest Rules shall be at Shakepays sole discretion.

5.11. TIME. The Contest will be conducted every day starting July 9th, 2021. In order to participate in the Contest, you must refer a friend who signs up using your referral link and completes the registration of their Shakepay account. You become a participant of the day when the criteria are met (e.g. if you refer the friend on Monday but they actually sign up on Tuesday then it would be Tuesday thats the relevant day, not Monday). Shakepay may end the Contest at any time, without notice to you.

5.12. ODDS OF WINNING. All Participants have equal odds of winning. If you sign up more than one friend on the same day, that will be considered as one Entry and will not increase your odds of winning. You can win more than once.

5.13. AMENDING THE CONTEST RULES. Shakepay reserves the right to amend the Contest Rules or to terminate the Contest at any time without any liability to any Participant (or any other person). Any amendments to these Contest Rules will be updated in this document and posted on the official Shakepay Discord community ( Participants are responsible for checking the Contest Rules and agree to abide by the most recent Contest Rules posted as at the Contest Closing Date and Time.

5.14. THE RULES ARE BINDING. By entering the Contest, you represent and warrant that you have read, and agree you will abide by, the Contest Rules. You further agree you will abide by the decisions of Shakepay, which decisions are final and binding on all Participants.

5.15. NO WAIVER. Any failure by Shakepay to enforce any provision of these Contest Rules shall not constitute a waiver of that provision. The invalidity or unenforceability of any provision of these Contest Rules shall not affect the validity or enforceability of any other provision. If any provision of the Contest Rules is determined to be invalid or otherwise unenforceable, then the Contest Rules shall be construed in accordance with their terms as if the invalid or unenforceable provision was not contained therein.

tablets under 10000 - buy the best tablets at below rs. 10,000 on flipkart

Dont be under the impression that a smartphone and a laptop are enough for you. Imagine travelling on an annoyingly long train journey, and you need some sort of entertainment and when you take out your smartphone, theres very little battery left. What would you do in these cases? You can use your smartphone as you will need to make calls, you can carry your laptop with you wherever you go. These are the times' tablets come to our rescue. Buy a tablet under 10,000 rupees and keep yourself connected and entertained wherever you are. Browse through various brands like Samsung, Lenovo, Alcatel, Swipe, and Micromax and pick the best tablet under 10000 online.

You dont have to spend a fortune on a tablet - these days you can buy a tablet for as less as Rs. 10,000. Read on to know more about why you need a tablet in spite of having a smartphone and a laptop.

Tablets are extremely portable, which means you can simply carry them in your handbag or even in your backpack effortlessly. You dont even have to worry about luggage weight as tablets are sleek and lightweight.

You cant carry your laptop with you wherever you go. No matter how slim it is or how lightweight it is, a laptop isnt convenient for travel. But when it comes to tablets, that isnt the case. They have a screen size which is around 7 to 12 inches, which can be easily slid into any bag. You can even carry a tablet in your hand while going for a walk.

The Lenovo Phab 2 is a great entertainment booster. With this tablet under 10000, you can watch YouTube videos and play graphics-rich games whenever and wherever on its 16.25 cm HD screen. Watch movies in a picture-perfect clarity with its IPS screen. The Dolby Atmos technology further enhances your sound experience. Thats not all, you can also capture lifes best moments with this tablet, thanks to its 13 MP rear camera and 5 MP front camera.

The Alcatel A3 tablet is another great tablet under Rs. 10,000. This affordable and functional tablet enhances your entertainment experience. So whether you want to watch movies, listen to music or read books, there will be no end to the things you can do with this Alcatel tablet. Its 25.4 cm display offers a clear display to read books on the go. Whats more, this compact and lightweight tablet come with a 3D textured back cover which gives it a premium look and feels.

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earthquake rollers - scientific american

Introduction Earthquakes can cause serious damage to buildings and be dangerous to people. But some of the worlds most populous cities are in earthquake-prone regions. How can engineers keep the millions of people in those cities safe? Find out how you can use science to save lives in this fun activity!

Background Earths tectonic plates are continuously moving. Usually this movement is very slowso slow that we can barely notice it. This slow movement may eventually cause cracks to form in buildings over time but will usually not cause sudden, unexpected damage. Sometimes, however, the plates get stuck for awhile and then rapidly become unstuckkind of like when you try to open a stuck window when at first it doesnt move at all and then suddenly moves very fast. We call this sudden movement of the ground an earthquake. These events can cause buildings to wobble and even collapse, posing a serious danger to the people inside or near them.

Engineers have developed various methods to make buildings more earthquake-resistant. For example, some buildings are slightly flexible so they can wobble back and forth a bit without breaking. Some very tall buildings have a heavy weight at the top called a tuned mass damper that helps cancel out the vibrations from a quake. Other buildings have isolation bearings, also referred to as a base isolation system. As the name implies, these bearings help isolate the base of a building from the ground, allowing it to move independently during an earthquakethat is, as the ground moves back and forth, the structure does not move with it. The concept is similar to shock absorbers on a car. When you ride over a big speed bump or pothole in the road, the shock absorbers help prevent the vibration from being transferred to the passengers in the car.

Engineers test their earthquake-resistant designs on model buildings using shake tablesspecial tables that shake back and forth to simulate an earthquake. In this project you will use a simple hand-powered shake table to demonstrate how isolation bearings can help prevent a building from shaking back and forth with the ground during an earthquake.

Observations and results You should notice the cardboard box does not move back and forth as much when you place it on the markers. This is because the round markers allow the box and the ground to slide back and forth with respect to each other. When you shake the cardboard, it moves back and forth under the boxbut this motion is not completely transferred to the box. (Some motion is still transferred due to friction in the rollers.) This simulates a base isolation system that lets a building move side to side independently of the ground.

Real-life base isolation systems are more complicated than this. As mentioned in the extra step above, you might have noticed that it was hard to get your building to return to exactly where it started. It might tend to drift off to one side and fall off the markers. Obviously that would not be acceptable with a real buildingyou need it to stay in the same place! Real base isolation systems contain springs, which generate a restoring force to pull the structure back toward the middle when it moves to either side. This introduces a new problem, howeversprings oscillate (think: a Slinky bouncing back and forth after you pull on one end). So, base isolation systems also include dampers, or elements that use friction to diminish the oscillations. You might be able to build a better base isolation system using household materials. But be carefulstrong springs (such as tightly-pulled rubber bands) with too little friction can actually make the oscillations worse!

More to explore Earthquake Protector: Shake Table Crash Testing, from Benchmark for Structural Vibration Control Earthquake-Proof Engineering for Skyscrapers, from Scientific American Set Your Table for a Sweet and Sticky Earthquake Shake, from Science Buddies Science Activities for All Ages!, from Science Buddies