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隔板式钢-混凝土曲线组合梁弯扭性能

, PP. 1107-1114

Keywords: 土木建筑结构,钢-混凝土曲线组合梁,弯扭效应,横隔板,模型试验,有限元分析

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Abstract:

为了研究钢-混凝土曲线组合梁的受力性能及横隔板影响,以跨径比(计算跨度与曲线半径的比值)和横隔板数目为参数,对6片“隔板式”简支曲线组合梁进行了试验研究和有限元数值模拟,分析了其在跨中荷载作用下的全过程受力性能、应变分布和结合面相对滑移规律。结果表明:跨径比的增大使曲线组合梁的弯扭破坏特征加强,横隔板数量对其影响不大;切向和径向应变均在有横隔板处曲线内侧小、外侧大,无横隔板处则相反;结合面切向和径向滑移均随跨径比的增大而增大,横隔板数目对切向滑移影响较小,但横隔板处径向滑移增大。因此横隔板对曲线组合梁的横向应变分布和径向滑移有较大影响,端横隔板对增加抗扭刚度作用明显。

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