Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures
Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures
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DOI：
10.1590/s1679-78252013000500004
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发表时间：
2013-09-01
影响因子：
1.2
通讯作者：
Khaleel, M.
中科院分区：
文献类型：
--
作者：
Jameel, Mohammed;Islam, A.B.M. Saiful;Khaleel, M.
地震作用下相邻建筑物的碰撞会增加结构构件的损伤，甚至导致结构倒塌。在可能的建筑物破坏中，地震引起的碰撞在几次地震中经常被观察到。因此，考虑结构的碰撞效应是十分必要的。本研究旨在了解不同高度相邻建筑物在地震作用下的反应行为。不同的结构之间的间隔距离的影响也进行了研究。本文对相邻变高度结构碰撞问题进行了时域非线性有限元分析。为了说明避免结构碰撞的重要性，将所得结果与没有碰撞现象的模型进行了比较。得到了层间剪力、碰撞力、层间位移、点位移和加速度的形式。建筑物碰撞时，碰撞水平处的加速度显著增大。产生的额外碰撞力可能会对结构的结构构件造成严重的破坏。碰撞在不同楼层产生的剪力大于无碰撞情况下的剪力。当撞击发生时，高的建筑物比矮的建筑物遭受更大的破坏。增加间距往往会以一致的方式减少层间剪力。研究结果还表明，传统的建筑模型只考虑梁和柱低估了碰撞效应。应采用更真实的模型，如梁、柱和板，以准确理解碰撞现象。
Pounding of neighbouring construction of structures due to seismic excitation increases the damage of structural components or even causes collapse of structures. Among the possible building damages, earthquake induced pounding has been commonly observed in several earthquakes. Therefore it is imperative to consider pounding effect for structures. This study aims to understand the response behaviour of adjacent buildings with dissimilar heights under earthquake induced pounding. Effects of different separation distances between structures are also investigated. Nonlinear finite element analysis in time domain has been carried out for pounding of neighbouring structures having varying heights. To show the importance of avoiding pounding in structures the results obtained were compared with model having no pounding phenomena. The results were obtained in the form of storey shear, pounding force, storey drift, point displacement and acceleration. The acceleration at pounding level significantly increases during collision of building. The generated extra pounding force may cause severe damage to structural members of structures. Pounding produces shear at various story levels, which are greater than those obtained from no pounding case. Building with more height suffers greater damage than shorter building when pounding occurs. Increasing gap distance tends to reduce story shear in consistent manner. The results also show that the conventional modelling of building considering only beams and columns underestimates pounding effects. More realistic modelling such as beams, columns and slabs shall be adopted to accurately understand the pounding phenomenon.