(1 北京建筑大学大型多功能振动台阵实验室, 北京 100044;2 北京建筑大学工程结构与新材料北京高等学校工程研究中心, 北京 100044)

摘要: 为避免小剪跨比剪力墙在地震下发生脆性剪切破坏,提出一种 M 型钢-混凝土组合剪力墙,采用 M 型钢作为剪力墙竖向分布钢筋,具有整体性能好、抗扭刚度大、施工效率高等特点,在大震下呈现分缝受力的破坏模式,表现出良好的抗震性能. 采用 ABAQUS 有限元软件对 M 型钢-混凝土组合墙体进行非线性拟静力分析,研究不同免拆模板类型、轴压比、水平钢筋配筋率对墙体的抗震性能的影响,对墙体的塑性损伤分布情况进行对比分析. 结果表明:有限元模拟结果与试验结果吻合程度良好,墙体混凝土损伤呈两阶段分布. M 型钢-混凝土组合墙体具有较大的承载力和抗侧刚度,免拆模板类型对墙体抗震性能影响不大,降低水平钢筋配筋率会使墙体承载力显著下降,加速刚度衰减,延性和耗能能力显著增强,减小轴压比会降低墙体承载力,但延性系数有所提高.

关键词: M 型钢; 组合墙体; 抗震性能; 配筋率; 轴压比; 塑性损伤

中图分类号:TU398. 2,TU352. 11 文献标志码:A 文章编号:1002-848X(2023)03-0021-06

DOI:10. 19701 / j. jzjg. 20211188

Finite element analysis on seismic performance of M-section steel-concrete composite shear wall

ZHANG Guowei1,2, AN Jianing1,2, GAO Haizhi1,2, QIAO Dongxu1,2

(1 Multi-Functional Shaking Tables Laboratory, Beijing University of Civil Engineering and Architecture, Beijing100044, China; 2 Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and RenewableMaterial, Beijing University of Civil Engineering and Architecture, Beijing 100044, China)

Abstract: In order to avoid brittle shear failure of small shearing-span ratio shear walls under earthquakes, an M-sectionsteel-concrete composite shear wall was proposed. The structure uses M-section steel as the vertical distribution steel bars ofthe shear wall, which has the characteristics of good overall performance, high torsional rigidity and high constructionefficiency. It presents a fracture mode of joint stress under large earthquake, showing good seismic performance. Thenonlinear pseudo-static analysis of M-section steel-concrete composite wall was done by finite element analysis softwareABAQUS. The effects of different types of non-demolition formwork, axial compression ratio and horizontal steelreinforcement ratio on the seismic performance of the shear walls were studied. The damage distribution of shear walls wascompared and analyzed. The results show that finite element software analysis results can simulate the test resultsaccurately, the damage of concrete is distributed in two stages of wall. The M-section steel composite walls has greaterbearing capacity and lateral rigidity. The type of non-dismantling formwork has little effect on seismic performance of thewall. The bearing capacity of the wall will decrease significantly if the horizontal reinforcement ratio is reduced, thestiffness degradation is relatively accelerated, the ductility and energy dissipation capacity are significantly enhanced.Reducing the axial compression ratio will reduce bearing capacity of the wall, but the ductility coefficient will increase.

Keywords: M-section steel; composite wall; seismic performance; reinforcement ratio; axial compression ratio;plastic damage

∗北京建筑大学市属高校基本科研业务费专项(X20063).

第一作者:张国伟,博士,教授,硕士生导师,主要从事工程结构抗震及减震技术、装配式混凝土结构、结构检测与加固等研究,Email: zhangguowei@ bucea. edu. cn.

[引用本文] 张国伟,安佳宁,高海智,等. M 型钢-混凝土组合剪力墙抗震性能有限元分析[ J]. 建筑结构,2023,53(3):21-26,63 . ZHANG Guowei,AN Jianing,GAO Haizhi, et al. Finite element analysis on seismic performance ofM-section steel-concrete composite shear wall[J]. Building Structure,2023,53(3):21-26,63.