外包钢-混凝土组合梁受扭性能  

Torsion behavior of Steel-encased Concrete Composite Beams

作　　者：赵静[1] 蔡建林[2] 

机构地区：[1]淮阴工学院建筑工程系,江苏淮安223001 [2]江苏大学土木工程系,江苏镇江212013

出　　处：《土木建筑与环境工程》2009年第5期16-23,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：江苏省博士后基金(0701008B)

摘　　要：为了研究外包钢-混凝土组合梁的扭转性能,对8根外包钢-混凝土组合梁进行了纯扭和复合受扭实验。研究了组合梁在纯扭和复合受扭作用下的破坏形态,工作机理以及裂缝发展分布的情况,比较分析了组合梁扭矩-扭率、荷载-应变、弯矩-挠度、荷载-裂缝之间的相互关系。通过对组合梁受扭性能的弹塑性理论分析,提出了组合梁纯扭及复合受扭作用下开裂扭矩的计算公式;采用变角空间桁架模型,提出了该新型组合梁在纯扭及复合受扭作用下的极限扭矩计算公式,理论公式计算结果与试验结果吻合良好。In order to study torsion behavior of steel encased concrete composite beams, experiments were carried out with eight specimens. The destruction shape, working mechanism and the crack development and distribution were analyzed under pure torsion and combine torsion conditions. And also the relationships were investigated between torque and torsion ratio, load and strain, bending moment and deflection and load crack. On the basis of elasticity plastic theory, the formulas of cracking torsion were presented for pure torsion and combined torsion of combined beam. And with spatial truss model of variable angle, formulas for ultimate torsion strength of pure torsion and combined torsion were put forward. The predicted results were in good agreement with measured ones. The proposed formulas provided basis for evaluating safety and stability of the structural.

关 键 词：新型外包钢-混凝土组合梁 扭转试验 开裂扭矩 极限扭矩 

分 类 号：TU375.1[建筑科学—结构工程] TU398