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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 composite beam with double-section steel beam is introduced. The flexural capacity, deformation, ductility, ultimate curvature and ultimate bending moment of normal section of double-section steel beam are studied by four-point static loading test Other performance indicators. The test results show that the double-section steel concrete beam has higher bearing capacity and better ductility, and the cracking load of the double-section steel concrete beam is affected by the ratio of the stirrups, the profile of the steel flanges, the spacing of the steel sections, the ratio of longitudinal reinforcement and the pin arrangement And the ultimate load has a certain impact. By comparing the test data, the concrete part and the whole part coefficient of the bending resistance formula in China’s JGJ 138-2001 “Technical Specification of Section Steel” and YB 9082-97 “Design Rules of Steel Reinforced Concrete Structure” are amended, and the double section steel Bending Calculation of Concrete Beams.