预埋波纹管钢筋约束浆锚连接的预制剪力墙有限元分析  

Finite Element Analysis of Precast Shear Walls Connected by Pre-embedded Corrugated Pipes and Restrained Grouting-anchor of Steel Bars

作　　者：陈昕[1,2] 侯世伟 刘明[1,2] 杨永生[3] CHEN Xin;HOU Shiwei;LIU Ming;YANG Yongsheng(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Research Center of Engineering Technology of Modern Construction Industry in Liaoning Province,Shenyang,China,110168;Editorial Department of Journal,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]辽宁省现代建筑产业工程技术研究中心,辽宁沈阳110168 [3]沈阳建筑大学学报编辑部,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第3期452-460,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51738007);辽宁省教育厅青年科技人才“育苗”项目(lnqn201906)。

摘　　要：目的基于预埋波纹管钢筋约束浆锚连接预制混凝土剪力墙的抗震性能试验结果,研究不同参数对其受力性能的影响规律。方法合理地选用混凝土和钢筋的本构关系,采用有限元软件ABAQUS对该种浆锚连接预制剪力墙进行数值模拟。以轴压比、搭接长度和灌浆料强度为变量进行扩展分析,研究墙体的承载力及延性、刚度、耗能能力。结果轴压比0.4时,剪力墙峰值承载力比轴压比0.2试件增加了13.2%;轴压比增加至0.6时,墙体试件峰值承载力下降至轴压比0.2试件的90%。当钢筋搭接长度从0.7l_(a)增至1.6l_(a)时,墙体承载力有所提高,但延性和耗能逐渐降低;与钢筋直锚连接的剪力墙试件相比,搭接长度0.9l_(a)的试件与直锚试件延性相近。增大灌浆料强度未对该种连接方式预制剪力墙的力学性能产生明显影响。结论预埋波纹管钢筋约束浆锚连接预制混凝土剪力墙的抗震性能良好,说明采用预埋波纹管和螺旋箍筋约束的组合连接形式可靠。Based on the experimental results of the seismic performance of the precast concrete shear walls connected with the pre-embedded corrugated pipes and restrained grouting-anchor of steel bar,the influence of axial load ratio,steel bar lap length and grouting strength on their mechanical properties is studied.Reasonably select the constitutive relationship between concrete and steel bars,the precast shear wall connected with the grout anchor is numerically simulate by the finite element software ABAQUS.Using axial load ratio,lap length and grouting strength as variables for extended analysis,the bearing capacity and ductility,stiffness and energy consumption of the wall are studied.The research results show that when the axial load ratio is 0.4,the peak bearing capacity of the shear wall increases by 13.2%compared with the axial load ratio of 0.2.When the axial load ratio increased to 0.6,the peak bearing capacity of the specimen decreases to 90%of the specimen of axial load ratio 0.2.When the lap length of the steel bar increases from 0.7 l a to 0.9 l a,the bearing capacity of the wall increases,but the ductility and energy consumption gradually decreases.Compared with the shear wall connected with the steel bar straight anchors,the ductility of the specimens with a lap length of 0.9 is similar to that of the straight anchor specimens.Increasing the strength of the grouting material don’t have a significant impact on the mechanical properties of the precast shear wall with this connection method.The anti-seismic performance of the pre-embedded corrugated pipe and restrained spiral stirrup of grouting anchor connection of the precast concrete shear wall is good,it indicated that the combined connection form of the embedding corrugated pipe and spiral stirrup restraint is reliable.

关 键 词：预制剪力墙 波纹管成孔 约束浆锚 抗震性能 有限元分析 

分 类 号：TU375[建筑科学—结构工程]