短肢剪力墙损伤累积性能试验研究

Experimental research of damage performance of short pier shear wall

通过损伤分析方法来评估结构抗震能力是基于性能抗震设计发展的重要方向之一。本文基于短肢剪力墙低周反复荷载试验结果,建立了考虑2个方向相互作用影响的短肢剪力墙损伤评价模型,模型考虑了最大弹塑性变形造成的超越损伤和累积塑性变形引起的累积损伤效应影响。损伤指标演化过程可以较好地反映试件的破坏过程,证明了模型的合理性。累积损伤指标计算简单,模型可为结构震后安全评估提供参考。最后还确立了短肢剪力墙性能水平、层间位移角及损伤指标之间的对应关系,对基于损伤性能的结构抗震设计有所帮助。

To evaluate structural seismic capacity by means of damage analysis method is one of the most important directions of performance-based seismic design.Damage evaluative model of short pier shear wall,which considers the interactive effect of two directions,is presented based on the cyclic loading test results of short pier shear wall.Damage induced by maximum elastic-plastic deformation and cumulative plastic deformation is also considered in this model.Evolution damage indexes of specimens can better reflect its failure process,which justifies the reasonability of the proposed model.Damage index is simple easily calculated that provides good reference for the safety assessment of the structure under seismic type of loading.Lastly,the corresponding relation among performance level,inter-story displacement angle and damage index is established that does more good to damage performance-based seismic design.