Since it is difficult to evaluate seismic performances of complex high-rise shear wall structure by u-sing single performance index,bi-variable damage model considering first excursion failure and accumulated damage failure was adopted by using lateral displacement of components or structure and energy index.Howev-er,the effects of different failure patterns of shear wall were not included in existed bi-variable damage model. As the deviation of lateral displacement and accumulated energy dissipation for different failure patterns can be twice,the damage state of compression-shearing failure shear wall may easily be underestimated,and then the seismic performances of the structure be misjudged.Therefore,in the paper,32 shear wall specimens were se-lected,the effects of ultimate displacement and hysteretic energy of shear wall specimens with different failure patterns on damage calculation were analyzed,and an improved bi-variable damage model for shear wall was proposed to reasonably evaluate damage states of shear walls in different failure modes.Meanwhile,by consider-ing crack control of shear walls,change of bearing capacity and lateral displacement as performance index,rela-tion of damage states of shear walls,failure phenomenon and damage index were built up,then an improved performance standard classification was set,and an damage evaluating system for shear walls was fulfilled.Fi-nally,the rationality of the damage model was verified by experimental specimens under low frequency cyclic loads.Results show that damage curves calculated by damage model proposed in the paper fits well with the damage curves from the experimental results.New damage model for shear walls can evaluate damage states of components at different stages,which provides reference for further researches on the damage assessment of the shear wall under earthquakes and improvement on performance design of shear wall structures.%由于单一的性能指标难以对复杂高层剪力墙结构进行全面的抗震性能评估，通过引入考虑结构首次超越破坏和累积损伤破坏的双参数损伤模型，借助构件或结构的侧移、能量等性能参数评估结构的损伤状态，但现有的剪力墙双参数损伤模型缺乏考虑剪力墙不同破坏模式对损伤模型计算的影响，不同破坏模式试件侧移与累积滞回耗能差异近1倍，采用同样参数计算易导致低估剪压破坏类型试件的损伤状态，以至于错误判断结构抗震性能。为了弥补现有损伤模型评估不足，结合32个剪力墙试验试件，分析不同破坏模式剪力墙试件极限位移与滞回耗能对损伤计算的影响，提出改进的剪力墙双参数损伤模型，使之适用于评估不同破坏模式剪力墙试件的损伤状态，同时以剪力墙裂缝控制、承载力变化和层间侧移为性能指标，建立剪力墙试件损坏程度、破坏现象与损伤指数的对应关系，提出改进的剪力墙性能水准划分标准，完善剪力墙损伤评估体系。最后通过低周反复试验试件验证了改进损伤模型的合理性。结果表明，本文提出的损伤模型计算曲线与试件实际损伤曲线吻合良好，能合理评估构件不同阶段的损坏程度，为进一步研究地震作用下剪力墙的损伤评估以及完善剪力墙性能化设计提供借鉴和参考。
展开▼
