Plastic Rotation of Composite Beams
Plastic Rotation of Composite Beams
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组合梁的塑性旋转
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
P. Ansourian
中科院分区：
文献类型：
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作者：
P. Ansourian
研究了混凝土板与钢梁通过剪力连接的组合梁的下垂转动能力。对4根足尺梁进行了延性参数chi在0.65~3.0范围内的试验。这个参数是钢梁在倒塌时应变硬化程度的指标。给出了倒塌时的最小非弹性转动和挠度的表达式。给出了这些表达式在连续组合梁设计问题中的应用实例。结果表明，当最小值CH1=1.4时，在最坏的跨度和荷载组合(A)下，应有足够的下垂转角来发展常规塑性设计的倒塌荷载。
The sagging rotation capacity of composite beams consisting of a concrete slab attached to a steel beam by a shear connection is studied. Tests are reported on four full scale beams in the range of ductility parameter chi from 0.65 To 3.0. This parameter is an index of the degree of strain hardening developed in the steel beam at collapse. Expressions are proposed for the minimum inelastic rotation and deflection available at collapse. Examples are given of the application of these expressions to design problems with continuous composite beams. It is shown that, with a minimum value of chi equal to 1.4, Sufficient sagging rotation should be available to develop the conventional plastic design collapse load under the worst combinations of spans and loading (a).