钢板剪力墙结构的性态指标及损伤评估

Performance index and damage evaluation of steel plate shear walls

在钢板剪力墙结构基于能量的性态设计方法中,钢板剪力墙性态指标的合理确定是亟待解决的关键问题。本文对Park-Ang损伤模型进行了修正,提出了基于损伤指数确定钢板剪力墙层间位移性态指标的新方法。采用数值方法获取了2个系列共9个单层钢板剪力墙的滞回曲线,根据修正的Park-Ang损伤模型及损伤标准确定了钢板剪力墙在不同性态水平下的层间位移角限值,建立了钢板剪力墙的性态指标。采用修正的Park-Ang模型对1榀5层钢框架-钢板剪力墙在近场地震作用下的损伤进行了评估,验证了本文修正的Park-Ang损伤模型的合理性。

The determination of peribrmance indexes of steel plate shear wall is a key issue in the energy-based seismic design. Park-Ang damage model was modified in this work, and a new method determining the performance index based on the damage model was proposed. The hysteretic curves of a total of nine single-storey steel plate shear walls were obtained through numerical simulation method, and the inter-story drift limits of steel plate shear walls under different performance levels were determined according to the modified Park-Ang model and damage criteria. Finally, the damage performance of a five-story steel plate shear wall was evaluated based on the new modified Park-Ang model, and its effectiveness and reliability were verified.