皮天祥, 白绍良, 傅剑平. 跨高比L/h ≤1.5复合配筋连梁受力状态的模拟[J]. 工程力学, 2010, 27(5): 97-105.
引用本文: 皮天祥, 白绍良, 傅剑平. 跨高比L/h ≤1.5复合配筋连梁受力状态的模拟[J]. 工程力学, 2010, 27(5): 97-105.
PI Tian-xiang, BAI Shao-liang, FU Jian-ping. SIMULATION FOR BEHAVIOR OF LENGTH TO HEIGHT RATIO L/H≤1.5 COMPOSITELY REINFORCED COUPLING BEAMS[J]. Engineering Mechanics, 2010, 27(5): 97-105.
Citation: PI Tian-xiang, BAI Shao-liang, FU Jian-ping. SIMULATION FOR BEHAVIOR OF LENGTH TO HEIGHT RATIO L/H≤1.5 COMPOSITELY REINFORCED COUPLING BEAMS[J]. Engineering Mechanics, 2010, 27(5): 97-105.

跨高比L/h ≤1.5复合配筋连梁受力状态的模拟

SIMULATION FOR BEHAVIOR OF LENGTH TO HEIGHT RATIO L/H≤1.5 COMPOSITELY REINFORCED COUPLING BEAMS

  • 摘要: 根据钢筋混凝土联肢剪力墙复合配筋连梁在低周反复加载试验下的受力特征分析,在合理化假定基础上,该文发展了适用于模拟跨高比L/h≤1.5复合配筋连梁受力性能的超静定拉杆-压杆模型,该模型由包含对角斜向混凝土压杆、对角斜向钢筋压杆和对角斜向钢筋拉杆的主斜拉杆-压杆模型、以及包含菱形筋双肢和混凝土次斜压杆的菱形筋桁架模型组成。该文定量地确定了两类混凝土斜压杆变形与梁端侧移的关系,进而根据杆件间的变形规律建立起各拉杆和压杆的几何方程和变形协调方程,然后取各杆件为脱离体进行受力状态分析,得到杆件受力与变形之间的关系,最终在梁端截面位置建立起力总体平衡方程。共31个计算式的迭代计算结果与试验结果对比表明,该模型能较好地反映跨高比L/h≤1.5复合配筋连梁从开裂到失效全过程受力性能。

     

    Abstract: On the basis of mechanics characteristic analysis of compositely reinforced coupling beams (CRCB) in reinforced concrete coupled shear walls under the experiment of a low frequency cyclic loading sequence and some rationalized hypothesis, the paper presented a statically indeterminate strut-tie model applied to the behavior simulation of CRCBs with the span to depth ratio L/h≤1.5. This model is comprised of a main diagonal strut-tie model which includes a diagonal concrete strut, a diagonal reinforcement strut and a diagonal reinforcement tie, and a rhombic truss model which includes two bars of rhombic reinforcement ties and a secondary concrete strut. The paper gave a definite equation between the deformation of two kind concrete diagonal struts and displacement of the coupling beams, then the struts and ties’ geometric equations and deformation compatibility equations were set up according to the deformation of members. Furthermore, the relationship between the members’ forces and deformations were obtained by the free bodies of the members. The total equilibrium equations at the end section of the beams were established eventually. The result Comparison between iterative calculation of the total 31equations and experiment shows that the model can better reflect the whole process that from crack to failure behavior of CRCBs with the span to depth ratio L/h≤1.5.

     

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