摘要
为了应对中国在新时期提出的“经济,适用,绿色,美观”的建筑政策,装配式结构逐渐成为近年来关注的焦点.对比传统现浇结构,装配式结构更符合节能、节材、环保等要求.因此,进一步研究装配式结构的抗震性能是非常重要的.考虑现有装配式剪力墙结构节点连接部位存在湿作业、施工难度大,常常出现强构件弱节点,抗震性能有待进一步深入研究等情况.为此我们提出一种新的结构形式———预应力约束下装配式剪力墙结构,该结构通过预应力筋连接结构的墙、板,使结构形成一个整体,减少施工现场湿作业,施工质量得以提高.当地震发生时结构通过改变自身的刚度,使其自震周期增大,达到减小地震应力的目的,同时很多提高延性因素的条件也无需考虑,避免钢材的浪费.通过对现浇剪力墙结构模型和预应力约束下装配式剪力墙结构模型进行时程分析,计算结果表明:与现浇剪力墙结构相比,预应力约束下装配式剪力墙结构可减小90%的地震作用,减震效果显著.
To contend with the construction policy of“economy,application,green,and beauty”introduced by contemporary China,the fabricated structure has gradually become the focus of attention in recent years.Compared with the traditional cast-in-place structure,the assembled structure is more in line with the requirements of energy-saving,material-saving,environmental protection,etc.Therefore,it is extremely important to further study the seismic performance of fabricated structures.Owing to the existence of wet operation in the joints of existing fabricated shear wall structures,construction is very difficult as strong members and weak joints often appear.Hence,we propose a new type of fabricated shear wall structure under prestressed constraint.The shear wall of the proposed structure was constructed by prestressed reinforcement.Due to no wet work at the construction site,the construction quality was improved.When an earthquake occurs,the natural period of the structure was increased by changing its stiffness,so as to reduce earthquake stress.At the same time,steel waste was avoided.Based on the time history analysis of the cast-in-place shear wall structure model and the prestressed shear wall structure model,the findings revealed that compared with the cast-in-place shear wall structure,the prestressed shear wall structure can reduce seismic response by approximately 90%and effectively reduce the earthquake effect.
作者
尹新生
刘晓巍
YIN Xinsheng;LIU Xiaowei(School of Civil Engineering,Jilin Jianzhu University,Changchun 130000,Jilin,China)
出处
《地震工程学报》
CSCD
北大核心
2020年第1期1-6,共6页
China Earthquake Engineering Journal
基金
国家自然科学基金(51178205)
关键词
预应力
装配式
变刚度减震
时程分析
prestressed
fabricated
variable stiffness damping
time history analysis
