高层再生混凝土框-剪结构动力弹塑性分析  

Dynamic Elastic-plastic Analysis on High-rise Recycled Aggregate Concrete Frame-shear Wall Structures

作　　者：肖建庄[1] 胡博[1] 王春晖[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2017年第5期633-642,共10页Journal of Tongji University:Natural Science

基　　金：国家杰出青年科学基金(51325802);上海市科委创新行动计划(14231201300)

摘　　要：在对再生混凝土材料性能深入分析的基础上,根据再生和普通混凝土材料非线性性能的差异,探讨了再生混凝土弹塑性分析时软件选取、材料本构模型确定、结构构件模型选取等关键问题.在此基础上完成了一再生混凝土框架-剪力墙结构高层试点工程的动力弹塑性分析,并与相应的普通混凝土结构模型的分析结果进行了对比.结果表明,当再生粗骨料取代率不大于30%时,再生混凝土结构模型在大震作用下其弹塑性层间位移角虽然较普通混凝土模型有所增大,但仍可满足抗震设防第三水准"大震不倒"的要求.再生混凝土结构由于结构弹塑性变形及刚度滞回退化所耗散的能量占总能量的32.8%,耗能能力较相应的普通混凝土结构下降9.6%.根据构件的性能状态可见,高层再生混凝土框-剪结构符合"强柱弱梁"、"强墙肢弱连梁"等抗震设计基本要求.Based on intensive analysis of material properties of recycled aggregate concrete （RAC） and the differences between the nonlinear behaviors of RAC and those of normal concrete, key points about elastic-plastic analysis on RAC structures, including selecting the proper analysis software, constitutive relation model and structure modeling were discussed. Then the elastic-plastic analysis on one RAC frameshear wall high-rise demonstration project was undertaken, while the analysis results were compared with those of normal concrete structures. The analysis result demonstrates that when the recycled coarse aggregate （RCA） replacement ratio is lower than 30%, although the relative elastic-plastic drift angle of RAC structures is larger than that of normal concrete structures, it can still meet the requirements of ＂nocollapsing with rarely-met intensity earthquake＂. The energy dissipation due to structural elastic-plastic deformation and hysteretic stiffness degradation of the RAC structure accounts for 32.8% of the total dissipated energy, which decreases by 9.6% compared to the corresponding normal concrete structure. According to the performance of the components, it can be concluded that the high-rise RAC frame-shear wall structure conforms the concepts for the seismic design such as ＂strong column-weak beam＂ and ＂strong wall-weak coupling beam＂.

关 键 词：再生混凝土 框-剪结构 动力弹塑性分析 抗震性能 高层试点工程 

分 类 号：TU375[建筑科学—结构工程]