(1 华中科技大学土木工程与力学学院， 武汉430074； 2 华中科技大学控制结构重点实验室，武汉430074)

［摘要］对钢筋混凝土井式梁结构进行了塑性极限分析，得出了极限承载力的实用计算通式及相应的系数供设计使用。假设各井式梁间内力比例与弹性结果相同，并考虑不同的边界条件，结果表明：对井式梁结构进行塑性极限分析，比弹性计算结果更接近实际的受力状态，避免了过量的内力调幅，使设计更为优化。

［关键词］井式梁结构；塑性极限分析；内力调幅

Plastic limit analysis of reinforced concrete waffle

Zhang Xianjin1, Fu Aiqun2

(1 School of Civil Eng. & Mechanics, HUST, Wuhan 430074, China; 2 Hubei Key Laboratory of Control Structure, HUST, Wuhan 430074, China)

Abstract:Plastic limit analysis is used to analyze reinforced concrete waffle structure.By this method, the general formulas and relevant coefficients of the ultimate bearing capacity are determined for design. On the assumption that the proportion of each beam internal force is identical with elastic one, different boundary conditions can be considered. The conclusion indicated that the result of plastic limit analysis of waffle is more adjacent to the factual state, and avoid the case of excessive amplitude modulation of internal force. The design of waffle will be more economical.

Keywords:waffle; plastic limit analysis; amplitude modulation of internal force

作者简介：张先进，工学硕士，副教授，一级注册结构工程师，Email:engineerzhang@126.com。