Liquefaction experiment and analysis projects (LEAP): Summary of observations from the planning phase
Liquefaction experiment and analysis projects (LEAP): Summary of observations from the planning phase
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DOI：
10.1016/j.soildyn.2017.05.015
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发表时间：
2017-05
影响因子：
4
通讯作者：
M. Manzari;Mohamed El Ghoraiby;B. Kutter;M. Zeghal;T. Abdoun;P. Arduino;R. Armstrong;M. Beaty;T. Carey;Yunmin Chen;Alborz Ghofrani;D. Gutierrez;Nithyagopal Goswami;S. Haigh;W. Hung;S. Iai;P. Kokkali;Chung-Jung Lee;S. Madabhushi;L. Mejia;M. Sharp;T. Tobita;K. Ueda;Yan-Guo Zhou;K. Ziotopoulou
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作者：
M. Manzari;Mohamed El Ghoraiby;B. Kutter;M. Zeghal;T. Abdoun;P. Arduino;R. Armstrong;M. Beaty;T. Carey;Yunmin Chen;Alborz Ghofrani;D. Gutierrez;Nithyagopal Goswami;S. Haigh;W. Hung;S. Iai;P. Kokkali;Chung-Jung Lee;S. Madabhushi;L. Mejia;M. Sharp;T. Tobita;K. Ueda;Yan-Guo Zhou;K. Ziotopoulou
介绍了LEAP国际合作实验室及其在美国-LEAP规划阶段(LEAP-2015)的主要目标和主要成就。LEAP-2015的主要主题是倾斜可液化土壤的横向扩展。摘要介绍了在选定土壤(渥太华F-65)上进行的实验室元素测试的结果。将几个预测者在项目不同阶段提交的数值模拟与世界各地六个不同离心机设施的刚性箱中测试的倾斜沉积物试件的实测响应进行了比较。给出了这里标记为A、B和C类模拟的三轮模拟的比较。A类模拟包括土样对规定的基础激励的响应，最大幅度为0.15g(运动#2)。数值模拟与实验结果的比较表明，A类模拟的一个子集与在参考离心机实验中测量的响应相当吻合。预报员随后通过将它们与测量的响应进行比较来评估它们的A型模拟的性能，对他们的模型进行了必要的调整，并对同一土壤样本在最大幅度为0.25G的放大基础激励下的响应进行了B型模拟(运动#4)。在这些B类模拟中，使用了所实现的基座运动，并且模拟结果与实验结果显示出更好的相关性。预报员还使用在六台离心机设备上实现的基座运动对原始测试(Motion#2)进行了C型模拟。计算结果与实验结果吻合较好。
The LEAP international collaboratory is introduced and its key objectives and main accomplishments during the planning phase of the US-LEAP (LEAP-2015) are presented. The main theme of LEAP-2015 was lateral spreading of sloping liquefiable soils. A summary of the results of the laboratory element tests performed on the selected soil (Ottawa F-65) is presented. The numerical simulations submitted by several predictors at different stages of the project are compared with the measured responses of sloping deposit specimens tested in a rigid box at six different centrifuge facilities around the world. The comparisons are presented for three rounds of simulations labeled here as types A, B, and C simulations. The type A simulations involved the response of the soil specimen to a prescribed base excitation with a maximum amplitude of 0.15g(Motion #2). Comparisons of the numerical simulations with the experimental results show that a sub-set of type A simulations were in reasonably good agreement with the responses measured in the reference centrifuge experiment. The predictors subsequently assessed the performance of their type A simulations by comparing them to the measured responses, made the necessary adjustments in their models, and conducted a type B simulation of the response of the same soil specimen subjected to an amplified base excitation with a maximum amplitude of 0.25g(Motion #4). In these type B simulations, the achieved base motions were used and the simulations showed an improved correlation with the experimental results. The predictors also conducted a type C simulation of the original test (Motion #2) using the base motions achieved on the six centrifuge facilities. The results showed very good agreement with the experimental results.