Numerical and experimental evaluation of seismic capacity of high-rise steel buildings subjected to long duration earthquakes
Numerical and experimental evaluation of seismic capacity of high-rise steel buildings subjected to long duration earthquakes
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DOI：
10.1016/j.compstruc.2011.01.017
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发表时间：
2011-06
影响因子：
4.7
通讯作者：
D. Lignos;Yu‐Lin Chung;T. Nagae;M. Nakashima
中科院分区：
文献类型：
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作者：
D. Lignos;Yu‐Lin Chung;T. Nagae;M. Nakashima
据报道，世界各地都有沿着俯冲带发生8级以上大地震的报道。由于大量的荷载逆转，由于劣化对结构构件的累积损伤的影响对于旧建筑的钢结构建筑物变得至关重要，但对于基于当前抗震规定设计的建筑物也可能变得至关重要。一个国家的最先进的分析模型，模拟组件退化和断裂，由于低周疲劳已被开发和实施的OpenSees计算框架。该模型可用于长期地震作用下钢框架结构的抗震评估。数值模型在高层钢结构抗震能力的量化的有效性证明通过验证与全尺寸的高层钢建筑振动台试验进行了长时间的记录在世界上最大的振动台设施（E-国防）。所提出的数值模型的局限性进行了讨论。
Occurrences of large earthquakes having a magnitude larger than eight along subduction zones have been reported worldwide. Due to large number of load reversals the effect of cumulative damage on structural components due to deterioration becomes critical for steel buildings of old construction but may also become critical for buildings designed based on current seismic provisions. A state-of-the-art analytical model that simulates component deterioration and fracture due to low cycle fatigue has been developed and implemented in the OpenSees computational framework. The model serves for seismic evaluation of steel moment frame structures subjected to long duration records. The effectiveness of the numerical model in quantification of the seismic capacity of high rise steel structures is demonstrated through validation with a full scale shaking table test of a high-rise steel building subjected to a long duration record at the world’s largest shaking table facility (E-Defense). Limitations of the proposed numerical model are also discussed.