不连续支承钢筋混凝土板的力学行为研究

With the development of complex structure, the complicated boundary supports of the reinforced concrete slabs are conflicting with the traditional method. The calculation method of unified boundary theory cannot fulfill the analysis of the slab with discontinuous supports. The method combined experiment research, theoretical analysis and numerical simulation will be applied in studies of the mechanical behavior of the slab with complex discontinuous supports. In this project, the analysis of stress and deformation and the numerical model of the slab with discontinuous supports will be created, and the distribution rules of yielding line will be summarized. Due to the complex distribution and non-uniform stress of the slabs, the yielding line induction will be utilized to improve the bearing capacity of slab, and the pattern of yielding line will be adjusted, which will provide the basis to estimate ultimate bearing capacity of slabs for designer and the theoretical and technical support for the engineering application of the slab with discontinuous supports.

随着结构形式的复杂化发展，钢筋混凝土板复杂的边界支承形式与传统的分析计算方法间存在矛盾，采用统一边界理论的计算方法已无法满足对不连续支承板的分析计算。本项目拟通过试验研究、理论分析、数值模拟相结合的方法，对不同支承形式复合的不连续支承板的力学行为进行研究，建立不连续支承板的受力、变形分析方法和数值分析模型，总结屈服线分布规律，针对板中应力分布复杂且不均匀的问题，拟通过屈服线诱导改善板的受力性能力，调整板中屈服线分布，为设计者正确估计板的极限承载力提供依据，为不连续支承板的工程应用提供理论支持和技术保障。

在对一系列具有复杂支承条件的钢筋混凝土板试件力学行为进行试验分析的基础上，采用理论分析和数值模拟相结合的方法，对不同支承条件复合的不连续支承钢筋混凝土板的力学性能和变形能力进行了研究，通过试验获得了不连续支承条件下钢筋混凝土板的极限破坏形态，总结出不连续支承条件下钢筋混凝土板的屈服线分布规律，为预测不连续支承钢筋混凝土板的极限承载力提供依据，并给出了复杂支承条件下钢筋混凝土板的变形分析方法，在此基础上，通过改进后的非均匀配筋法，实现了对复杂应力区域的屈服线诱导，可以为不连续支承板的工程分析提供理论支持。