新型外包钢-砼组合梁滑移及变形性能的试验  

Experimental Study on the Interface Slip of New Type of Steel-encased Concrete Composite Beams

作　　者：石启印[1] 章荣国[1] 李爱群[2] 

机构地区：[1]江苏大学理学院,江苏镇江212013 [2]东南大学混凝土与预应力混凝土结构教育部重点试验室,江苏南京210096

出　　处：《四川大学学报（工程科学版）》2006年第6期13-17,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：江苏省自然科学基金资助项目(BK2004064);江苏省建设厅基金资助项目(JS200321)

摘　　要：为研究新型外包钢-砼组合梁的钢-砼交界面相对滑移及变形性能,设计4根不同剪力连接系数足尺简支梁,其中1根为完全剪力连接组合梁,其余为部分剪力连接组合梁。通过对4根简支梁的试验研究,得到组合梁的荷载-滑移、荷载-挠度关系曲线。根据试验结果分析新型外包钢-砼组合梁交界面相对滑移发展的过程和分布规律。利用有限元分析软件ANSYS,对组合梁的交界面相对滑移性能进行了非线性有限元分析,提出剪力连接系数的合理范围。在基于现行规范的基础上提出了组合梁跨中挠度的建议计算公式。把有限元模型和建议公式的计算结果与试验结果进行比较,三者吻合良好。To study the interface slip and the deflection properties of a new type of steel-encased concrete composite beams, four full size simply supported specimens with different shear connection coefficient were designed. One was a beam＇with full shear connection, and the others with partial shear connection. According to the experiment , a set of load-slip curves and load-deflection curves are derived. Based on these results, the interface slip development process and distribution laws are gained. Taking the interface slip into account, a nonlinear finite element analysis model is established by using the finite element analysis soft-ANSYS, and gains a reasonable shearing connection coefficient. Based on the actual code, a theoretical formula is proposed for deflection. The results of finite element model and theoretical formula are proved to be in good agreement with the experimental data.

关 键 词：外包钢-砼组合梁 界面滑移 变形 非线性有限元分析 理论计算公式 

分 类 号：TU398[建筑科学—结构工程] TU317.1