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中文摘要：
为研究不同翼板形式组合梁的受弯性能,完成了4根不同翼板形式钢-混凝土组合梁跨中两点对称加载试验,采用有限元方法对构件受力行为进行分析。研究结果表明：预制板组合梁和叠合板组合梁在正弯矩作用下受力性能基本一致,但在负弯矩作用下两者受力性能差异显著;预制板组合梁在混凝土翼板开裂之后,裂缝宽度不能得到有效抑制,截面刚度迅速下降,较早地进入承载能力极限状态。
英文摘要：
In order to study the flexural behavior of composite beams with different styles of concrete flange, experiments of four steel- concrete composite beams under bisymmetric mid- span loading were conducted, and mechanical behavior of all specimens were analysed by using finite element method. The research result shows that （1） performances of composite beam with precast slabs and composite beam combined with preeast slabs and concrete cast -in-situ are similarly under sagging moment, but significantly differently under hogging moment; （2） after crack occurs in the concrete flange of composite beam with precast slabs, the crack width develops without effective restriction, the stiffness of section decreases quickly, and the carry capacity of limit state will be formed earlier.
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