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工程力学  2013 

基于应变分解方法的钢筋混凝土开裂模型

DOI: 10.6052/j.issn.1000-4750.2011.09.0639, PP. 174-180

Keywords: 钢筋混凝土,开裂模型,应变分解,非线性,骨料咬合,销栓作用

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Abstract:

为了克服传统弥散裂缝模型的不足,采用应变分解的方法,推导了钢筋混凝土单元的开裂模型;通过假定裂缝面法向和切向变形解耦,采用混凝土非线性断裂力学的基本理论分别构造裂缝面法向和切向的本构关系;对于混凝土单元中的钢筋,在开裂后不仅考虑其轴向刚度,同时采用弹性地基梁模型考虑其横向作用对开裂混凝土应力传递的影响;采用FORTRAN语言编制程序,通过与经典梁、板构件试验结果的比较,表明该模型的合理性和有效性;可用于钢筋混凝土结构非线性和极限承载力的分析。

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