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工程力学  2015 

跨高比L/h≤1.5复合配筋连梁箍筋受力性能的拉杆-压杆模型分析

DOI: 10.6052/j.issn.1000-4750.2013.10.0946, PP. 69-76

Keywords: 超静定拉压杆模型,变形协调方程,小跨高比连梁,箍筋,抗剪

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Abstract:

试验表明:对称设置斜向钢筋的小跨高比复合配筋连梁具有良好的抗震性能,在建立并求解水平地震作用下该连梁中由混凝土主斜压杆、次斜压杆、对角斜筋拉、压杆和菱形筋拉杆等组成的超静定拉杆-压杆联合工作受力分析模型基础上,通过对连梁箍筋参与的传力机构分析,提出了由箍筋和混凝土次生斜压杆组成的箍筋桁架宏模型,建立了该模型中各箍筋拉杆和混凝土压杆的几何及变形协调方程、物理方程和平衡方程等共26个计算式和分析程序,2个试验试件的算例对比分析结果显示,该模型能反映连梁屈服后各受力阶段箍筋的受力状态,且计算结果具有较好的准确性。

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