基于破坏模式的改进剪力墙双参数损伤模型  

Improved bi-variables damage model for shear walls based on failure pattern

作　　者：吴轶[1] 杨春[2,3] 黄照棉[1] 曾春辉[1] WU Yi YANG Chun HUANG Zhao-mian ZENG Chun-hui(School of Civil Engineering, Guangzhou University, Ouangzhou 510006, China a. School of Civil Engineering and Transportation b. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Chin)

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]华南理工大学土木与交通学院,广东广州510640 [3]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640

出　　处：《广州大学学报（自然科学版）》2016年第5期13-20,共8页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金青年科学基金资助项目(51108104);广东省自然科学基金资助项目(S2012010010074);市属高校"羊城学者"资助项目(12A001D);省科技计划资助项目(2013B020200016);国家留学基金委资助项目

摘　　要：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.Since it is difficult to evaluate seismic sing single performance index, bi-variable performances of complex high-rise shear wall structure by udamage model considering first excursion failure and accumulated damage failure was adopted by using lateral displacement of components or structure and energy index. However, 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 selected, 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 considercrack control of shear walls, change of bearing capacity and lateral displacement as performance index, relation of damage states of shear walls, failure phenomenon and damage index were built up, then an improved performance standard classification was set, and an nally, loads. damage the rationality of the damage model was verified by damage evaluating system for shear walls was fulfilled. Fiexperimental specimens under low frequency cyclic Results show that damage curves calculated by damage curves from the experimental results. New model proposed in the paper fits well with the damage model for shear walls can evaluate components at different stages, which provides reference for further researches on the damage damage states of assessment of the shear wall under earthquakes and improvement on performance design of shear wall structures.

关 键 词：损伤模型 剪力墙 性态水平 破坏模式 能量项损伤占比 

分 类 号：TU398.9[建筑科学—结构工程]