摘要
综合考虑闭口型压型钢板的板肋具备优越的连接件性能和抑制钢板屈曲等有利因素,提出一种外包闭口型压型钢板混凝土组合剪力墙结构。为研究轴压比、混凝土强度、钢板厚度和增强连接构造(钢板表面设置螺钉和肋缝灌胶)对组合剪力墙抗震性能的影响,进行了6个剪跨比为1.0的闭口型压型钢板组合剪力墙试件低周往复加载试验。试验加载过程中,采用非接触式3D-DIC测量系统对外包压型钢板的全场应变进行监测。试验研究表明:闭口型板肋能较好地发挥抗剪连接件作用,从而实现外包钢板和内填混凝土之间良好的共同工作性能;钢板屈曲后在主拉应变方向形成斜向拉力场作用,所有组合剪力墙试件荷载达到峰值时,各板带钢板在主拉应变方向已基本屈服;组合剪力墙具有稳定的滞回性能和良好的变形能力,极限位移角为1/53~1/38,钢板与混凝土的连接无需进一步采取增强措施。基于钢板拉力场理论模型和混凝土软化拉压杆模型,提出组合剪力墙水平受剪承载力计算公式,其计算值与试验值吻合良好。
A concrete-filled funnel-shaped profiled steel sheet composite shear wall(CFFPSCW) structure was proposed considering superior connector performance of funnel-shaped ribs and the ability to delay the buckling of steel sheets. In order to investigate influence of axial compression ratio, concrete strength, steel sheet thickness, additional configurations(tapping screws and filling rib seam), test on six specimens with a shear span ratio of 1.0 were carried out under cyclic loading. Non-contact 3 D-DIC(3 D-digital image correlation) was used to capture the full-field strain variation of the steel sheet during the loading process. The test results indicate that the funnel-shaped ribs behave as shear connectors, which can greatly enhance the cooperative performance between the steel sheet and the infill concrete. Diagonal tension field action is formed in the direction of principal tensile strain after steel sheet local buckling, and each sheet strips yield at the peak load. All the squat CFFPSCW specimens exhibit stable hysteretic performance and satisfactory deformation capacity. The ultimate drift levels are in the range of 1/53 to 1/38. No further connection strengthening is required between the steel sheet and infill concrete. Based on the tension field action model of the steel plate and the softened strut-and-tie model of infilled concrete, a calculation formula of the shear capacity of the CFFPSCW was proposed, and the calculated values were in good agreement with the experimental values.
作者
许力
郭子雄
郭亦宸
谢鑫尧
XU Li;GUO Zixiong;GUO Yichen;XIE Xinyao(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province,Huaqiao University,Xiamen 361021,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第2期109-118,共10页
Journal of Building Structures
基金
国家自然科学基金项目(52178485)
福建省科技重大项目(2020Y4011)。
关键词
低剪跨比组合剪力墙
闭口型压型钢板
低周往复加载试验
数字图像相关法(DIC)
抗震性能
拉力场作用
low-aspect-ratio composite shear wall
funnel-shaped profiled steel sheet
low-cyclic reversed loading test
digital image correlation(DIC)
seismic behavior
tension field action
