- 摘 要
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(1 北京建筑大學大型多功能振動臺陣實驗室, 北京 100044;2 北京建筑大學工程結(jié)構(gòu)與新材料北京高等學校工程研究中心, 北京 100044)
摘要: 為避免小剪跨比剪力墻在地震下發(fā)生脆性剪切破壞,提出一種 M 型鋼-混凝土組合剪力墻,采用 M 型鋼作為剪力墻豎向分布鋼筋,具有整體性能好、抗扭剛度大、施工效率高等特點,在大震下呈現(xiàn)分縫受力的破壞模式,表現(xiàn)出良好的抗震性能. 采用 ABAQUS 有限元軟件對 M 型鋼-混凝土組合墻體進行非線性擬靜力分析,研究不同免拆模板類型、軸壓比、水平鋼筋配筋率對墻體的抗震性能的影響,對墻體的塑性損傷分布情況進行對比分析. 結(jié)果表明:有限元模擬結(jié)果與試驗結(jié)果吻合程度良好,墻體混凝土損傷呈兩階段分布. M 型鋼-混凝土組合墻體具有較大的承載力和抗側(cè)剛度,免拆模板類型對墻體抗震性能影響不大,降低水平鋼筋配筋率會使墻體承載力顯著下降,加速剛度衰減,延性和耗能能力顯著增強,減小軸壓比會降低墻體承載力,但延性系數(shù)有所提高.
關(guān)鍵詞: M 型鋼; 組合墻體; 抗震性能; 配筋率; 軸壓比; 塑性損傷
中圖分類號:TU398. 2,TU352. 11 文獻標志碼:A 文章編號: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
∗北京建筑大學市屬高校基本科研業(yè)務費專項(X20063).
第一作者:張國偉,博士,教授,碩士生導師,主要從事工程結(jié)構(gòu)抗震及減震技術(shù)、裝配式混凝土結(jié)構(gòu)、結(jié)構(gòu)檢測與加固等研究,Email: zhangguowei@ bucea. edu. cn.
[引用本文] 張國偉,安佳寧,高海智,等. M 型鋼-混凝土組合剪力墻抗震性能有限元分析[ J]. 建筑結(jié)構(gòu),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.
