Collapse simulation of a four‐story steel moment frame by a distributed online hybrid test
Collapse simulation of a four‐story steel moment frame by a distributed online hybrid test
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DOI：
10.1002/eqe.798
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发表时间：
2008-05
影响因子：
4.5
通讯作者：
Tao Wang;J. McCormick;N. Yoshitake;P. Pan;Y. Murata;M. Nakashima
中科院分区：
文献类型：
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作者：
Tao Wang;J. McCormick;N. Yoshitake;P. Pan;Y. Murata;M. Nakashima
本研究以一个单跨四层钢框架为研究对象，利用P2P互联网在线混合测试系统，模拟了该框架的倒塌过程。通过强柱弱梁设计确保的典型梁铰接机制得以再现。柱脚处的塑性铰作为试验部分，上部结构采用通用有限元程序进行数值分析。两个柱脚的塑性转角被视为边界位移。为了考虑柱脚的复杂行为，P2P系统被修改为在迭代过程中使用割线刚度，并且物理试件被设计为使得可以获得塑性铰行为。在本研究中，三个子结构分布在不同的位置。一个大的地面运动反复施加，直到柱基失去他们的能力，以维持重力负荷。结果，在两个柱脚处观察到显著劣化。因此，所提出的P2P系统被证明能够适应涉及不稳定行为的多个测试子结构。结果表明，P2P互联网在线混合测试系统提供了一个可靠的手段，研究结构倒塌。版权所有© 2008约翰威利父子有限公司.
The collapse of a one‐bay, four‐story steel moment frame is simulated in this study by the proposed peer‐to‐peer (P2P) Internet online hybrid test system. The typical beam hinging mechanism, which is ensured by a strong‐column, weak‐beam design, is reproduced. The plastic hinges at the column bases are taken as the experimental portions, while the superstructure is analyzed numerically by a general‐purpose finite element program. The implicit plastic rotations of the two column bases are treated as boundary displacements. In order to account for the complex behavior of the column bases, the P2P system is modified to use the secant stiffness during iterations, and the physical specimens are designed such that the plastic hinge behavior can be obtained. For this study, the three substructures are distributed to different locations. A large ground motion is repeatedly imposed until the column bases lose their capacity to sustain the gravity load. As a result, significant deterioration is observed at both column bases. The proposed P2P system is thus demonstrated to be able to accommodate multiple‐tested substructures involving unstable behavior. The results suggest that the P2P Internet online hybrid test system provides a reliable means of studying structures up to collapse. Copyright © 2008 John Wiley & Sons, Ltd.