E-Defense Tests on Full-Scale Steel Buildings Part 2 - Collapse Experiments on Moment Frames
E-Defense Tests on Full-Scale Steel Buildings Part 2 - Collapse Experiments on Moment Frames
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DOI：
10.1061/40944(249)18
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
K. Suita;S. Yamada;M. Tada;K. Kasai;Y. Matsuoka;E. Sato
中科院分区：
文献类型：
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作者：
K. Suita;S. Yamada;M. Tada;K. Kasai;Y. Matsuoka;E. Sato
日本正在进行一项利用E-Defense三维振动台设施的钢结构建筑的重大研究项目。它涉及到对力矩框架、新建筑或现有建筑的创新方法、保护系统和非结构元素的几项研究。其中一项极具挑战性的地震试验将于2007年9月进行，以模拟一栋全尺寸建筑物的倒塌。倒塌被定义为结构失去承受重力载荷能力的状态。迄今为止，仅对多层钢框架进行了几次全尺寸试验，没有一次模拟倒塌。20年前，一个6层的力矩框架通过静态执行器模拟强震进行了伪动态测试。最近，一个包括外墙在内的3层力矩框架通过静载荷测试了总漂移角为1/15 rad，以反映比当前地震规范中考虑的更大的地面运动的影响。这些全尺寸试验采用准静态加载，因为没有能够进行更真实模拟的动态加载设备。2005年开始运行的E-Defense震动台能够使全尺寸结构承受世界上有记录的最强地面运动。将12000 kN的试样放置在15m × 20m的工作台上，工作台最大速度可达±2.0m/s，最大位移可达±1.0m。利用E-Defense振动台，我们首次有机会模拟全尺寸结构直至倒塌的行为，并获得详细的响应数据。本文概述了崩塌模拟的试验计划，以及试验准备过程中需要解决的技术问题。
A major research project on steel buildings utilizing the E-Defense three-dimensional shake table facility is underway in Japan. It involves several studies on moment frames, innovative methods for new or existing buildings, protective systems, and nonstructural elements. As one of the studies, a challenging seismic experiment to simulate collapse of a full-scale bulding comprising the moment frame will be conducted in September 2007. Collapse is defined as the state where the structure loses its ability to sustain gravity loads. To-date, only a few full-scale tests have been conducted for the multi-story steel moment frames, and none of those simulated collapse. Two decades ago, a 6-story moment frame was pseudo-dynamically tested by static actuators simulating severe earthquakes. Recently, a 3-story moment frame including exterior walls was tested up to an overall drift angle of 1/15 rad, by static loads to reflect the effects of the ground motion that is greater than considered in the current seismic codes. These full-scale tests employed quasi-static loading, since a dynamic loading facility capable of much more realistic simulations was not available. The E-Defense shake table which commenced operation in 2005 is capable of subjecting a full-scale structure to the strongest ground motion recorded in the world. With a 12,000 kN specimen placed on 15m x 20m table, the table can produce a maximum velocity of ±2.0m/s and a maximum displacement of ±1.0m. With the E-Defense shake table, we have the first opportunity ever to simulate the behavior of full-scale structures up to collapse, and to obtain detailed response data. This paper outlines the test plan of collapse simulation, as well as technical issues being addressed during the process of test preparation.