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考虑腹板剪切行为的波形钢腹板梁理论模型

, PP. 40-48

Keywords: 桥梁工程,波形钢腹板梁,理论模型,剪切变形,弯曲行为

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Abstract:

?为研究波形钢腹板剪切变形对波形钢腹板梁受力行为的影响,引入腹板剪切变形转角函数,将波形钢腹板梁的弯曲行为分解为桁架作用和弯曲作用,建立一个能够考虑波形钢腹板剪切变形的波形钢腹板梁理论模型。推导了端部无约束条件下简支波形钢腹板梁在均布荷载和端部约束条件下简支波形钢腹板梁在跨中集中荷载作用下的解析解,采用有限元方法验证了理论模型和解析解的正确性和适用性。研究结果表明:端部约束条件对主梁变形影响很小;波形钢腹板的剪切变形对主梁变形影响显著,在常见波形钢腹板梁桥尺寸范围内,由腹板剪切变形引起的主梁挠度占总挠度的10%~30%。

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