剪切破坏模式下考虑楼板作用的钢骨混凝土柱-钢梁节点恢复力模型  

A Resilience Model for Joints Between Steel-Reinforced Concrete Columns and Steel Beams Considering the Effect of Floor Slabs in a Shear Failure Mode CHU Liusheng

作　　者：楚留声[1] 闫增辉 田野[1] 元成方 YAN Zenghui;TIAN Ye;YUAN Chengfang(Yellow River Laboratory,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学黄河实验室,郑州450001

出　　处：《工业建筑》2023年第1期175-181,90,共8页Industrial Construction

基　　金：国家自然科学基金项目(51408556);河南省科技公关项目(202102310578)。

摘　　要：对剪切破坏模式下考虑楼板作用的钢管混凝土(SRC)柱-钢梁节点展开试验研究,共设计了6个不同轴压比和楼板厚度的节点,对拟静力试验结构进行分析。通过对比分析剪切破坏模式下带楼板和不带楼板的SRC柱-钢梁节点试验骨架曲线的规律,选取三折线模型建立剪切破坏模式下考虑楼板作用的SRC柱-钢梁节点的无量纲化骨架曲线,并通过ORIGIN软件进行线性拟合得出方程表达式。再分析6个节点在加载过程中不同阶段的刚度退化规律,建立其恢复力模型。将试验中相同阶段的刚度利用ORIGIN进行非线性回归,得出各个阶段的刚度退化曲线方程,并依照所提出的剪切破坏模式下考虑楼板作用的SRC柱-钢梁节点的恢复力模型进行计算,试验结果与模拟结果契合度较高,说明此模式下建立的恢复力模型是有效的。The joints between steel-reinforced concrete(SRC)columns and steel beams considering the effect of floor slabs in a shear failure mode were studied.A total of 6 joints with different axial compression ratios and floor thicknesses were designed to analyze the structure in quasi-static tests.By comparing and analyzing the laws of the experimental skeleton curves of joints between SRC columns and steel beams with and without floor slabs in a shear failure mode,a trilinear model was selected to establish the dimensionless skeleton curve for joints between SRC columns and steel beams in a shear failure mode considering floor slab effects,and the equation expression was obtained by linear fitting through the ORIGIN software.Then the stiffness degradation laws of the six joints at different stages during the loading process were analyzed,and a model of its resilience was constructed.The stiffness of the same stage in the test was non-linear regression by ORIGIN,and the stiffness degradation curve equations of each stage were obtained,and the calculation was conducted according to the resilience model of joints between SRC columns and steel beams considering the effect of floor slabs in the proposed shear failure mode,the test results and the simulation results were in good agreement,indicating that the restoring model was effective.

关 键 词：SRC柱 钢梁 轴压比 楼板 剪切破坏 无量纲化骨架曲线 恢复力模型 

分 类 号：TU398.9[建筑科学—结构工程]