| 底部放置聚苯板的预制剪力墙抗震性能试验研究 |
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| 引用本文： | 张微敬,闫怡雯,钱稼茹,刘时伟,韩兴运.底部放置聚苯板的预制剪力墙抗震性能试验研究[J].地震工程与工程振动,2021,41(1):16-24. |
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| 作者姓名： | 张微敬 闫怡雯 钱稼茹 刘时伟 韩兴运 |
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| 作者单位： | 北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124;清华大学土木工程系,北京100084;内蒙古蒙西筑工科建有限公司,内蒙古呼和浩特016000 |
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| 基金项目： | 国家自然科学基金项目(52078012);北京市自然科学基金项目(8152010)。 |
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| 摘 要： | 为研究底部放置聚苯乙烯硬泡沫板的抗震性能,对3个剪跨比2.0的两端设置后浇段、底部放置聚苯乙烯硬泡沫板的预制剪力墙试件以及1个相同剪跨比的现浇剪力墙试件进行了拟静力试验。试验结果表明:预制剪力墙底部放置硬聚苯乙烯泡沫板的试件,破坏形态为后浇段与预制剪力墙脱开、后浇段受压破坏;底部放置聚苯板的预制剪力墙试件承载力小于现浇剪力墙试件,耗能能力接近或大于现浇剪力墙试件;各试件的极限位移角为1/98~1/81;预制剪力墙试件的屈服刚度及峰值刚度均比现浇剪力墙试件降低27%~75%,水平分布钢筋未伸入后浇段的试件比伸入后浇段的试件刚度降低更多,后浇段短的试件比后浇段长的试件刚度降低更多。预制试件轴压力主要由后浇段承担,名义屈服及峰值水平力时,钢筋应变分布不符合平截面假定。
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| 关 键 词： | 预制剪力墙 聚苯板 降低刚度 抗震性能 拟静力试验 |
Experimental study on seismic performance of precast shear wall with polystyrene board at the bottom |
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| ZHANG Weijing,YAN Yiwen,QIAN Jiaru,LIU Shiwei,HAN Xingyun.Experimental study on seismic performance of precast shear wall with polystyrene board at the bottom[J].Earthquake Engineering and Engineering Vibration,2021,41(1):16-24. |
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| Authors: | ZHANG Weijing YAN Yiwen QIAN Jiaru LIU Shiwei HAN Xingyun |
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| Institution: | (Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China;School of Civil Engineering,Tsinghua University,Beijing 100084,China;Inner Mongolia Mengxi Building Engineering Construction Co.,Ltd.,Hohhot 016000,China) |
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| Abstract: | In order to study the seismic performance of the shear walls with polystyrene hard foam board at the bottom,quasi-static tests were carried out on three precast shear wall specimens with a shear span ratio of 2.0 and with post-casting boundary elements at both ends and polystyrene hard foam board at the bottom,and one cast-in-place shear wall specimen with the same shear span ratio.The experimental results show that:the post-casting boundary elements were detached from the precast shear wall and crushed.The strength capacity of the prefabricated shear wall specimens with polystyrene plates placed at the bottom is less than that of the cast-in-place shear wall specimen,and the energy dissipation capacity is close to or greater than that of the cast-in-place shear wall specimen.The ultimate drift ratio of each specimen is 1/98~1/81.The yield stiffness and peak stiffness of the prefabricated shear wall specimens are 27%~75%lower than that of the cast-in-situ shear wall specimens.The stiffness of specimens with horizontal distribution reinforcement not extended into the post-casting boundary elements decreased more than that of specimens with extended post-casting boundary elements,and the stiffness of specimens with shorter post-casting boundary element decreased more than that of specimens with long post-casting boundary element.The axial load of the precast specimen was mainly carried by the post-casting boundary elements.When the nominal yield and peak force were achieved,the strain distribution of the reinforcement did not satisfy the assumption of plane cross section. |
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| Keywords: | precast shear wall polystyrene stiffness reduction seismic performance quasi-static test |
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