双型钢混凝土梁正截面受弯性能的研究  

RESEARCH ON FLEXURAL PERFORMANCE OF DOUBLE-STEEL REINFORCED CONCRETE BEAM

作　　者：李俞谕[1,2] 肖岩[1,3] 刘涛[1] 曹大燕[2] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]广东省建筑科学研究院,广州510500 [3]美国南加州大学,洛杉矶ca90089

出　　处：《工业建筑》2015年第5期125-131,共7页Industrial Construction

基　　金：广东省科技计划资助项目(粤科规划字〔2010〕170号)

摘　　要：介绍一种新型组合结构形式梁——双型钢混凝土梁,通过6组梁的四点加载静力弯曲试验研究双型钢混凝土梁的正截面抗弯承载力、变形、延性、极限曲率和极限弯矩等性能指标。试验结果显示,双型钢混凝土梁具有较高的承载能力和较好的变形延性,箍筋率、型钢翼缘尺寸、型钢间距、纵筋配筋率和销钉布置均对双型钢混凝土梁的开裂荷载和极限荷载有一定的影响。通过对比试验数据,对我国JGJ 138—2001《型钢混凝土技术规程》和YB 9082—97《钢骨混凝土结构设计规程》中抗弯计算式的混凝土部分和整体部分系数做了修正,得出双型钢混凝土梁的抗弯计算式。A new type of steel concrete composite beam with double-joist steel sections encased was introduced. Six large-scale specimens were designed and tested under four-point bending condition to study the performance indicators of normal section bending bearing capacity,deformation,ductility and ultimate curvature and ultimate bending moment. It was found that the double-steel reinforced concrete beam had high strength and well ductility. The cracking load and ultimate load of the beam were influenced by the steel ratio,rebar ratio,stirrup ratio,steel size,space,and shear studs. Based on the comparison of the test results and through correcting coefficient of concrete part and the whole part in two Chinese codes,the bending calculation formula of double-steel reinforced concrete beam was obtained.

关 键 词：双型钢混凝土 延性 抗震性能 系数修正 

分 类 号：TU398.9[建筑科学—结构工程]