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混凝土是一种弹塑性材料,楼板的内力往往采用实用的弹性理论方法进行计算,而弹性理论的分析方法不考虑截面开裂,不能反映结构的实际受力与工作状态,其计算结果较为保守,不够经济。塑性极限平衡法较好地弥补了这些缺陷。本文运用极限平衡法计算无粘结预应力混凝土未开洞和中间开洞实验板的极限荷载,并通过7块无粘结预应力混凝土开洞板的实验,验证极限荷载公式的合理性和科学性。
Concrete is a kind of elastic-plastic material. The internal force of floor is often calculated by the practical theory of elasticity. However, the analysis method of elastic theory does not consider the crack of section and can not reflect the actual force and working state of the structure. The calculation results are conservative and not enough economic. Plastic limit equilibrium method to better make up for these shortcomings. In this paper, the limit equilibrium method is used to calculate the ultimate load of unbonded prestressed concrete unopened and middle open hole test plates, and through the experiment of 7 unbonded prestressed concrete open hole plates, the rationality of limit load formula and science Sex.