预应力混凝土超静定结构的弯矩调幅系数与抗裂度  

Crack-resistance and Moment Redistribution of Statically Indeterminate PC Structures

作　　者：孟少平[1] 吕志涛[1] 

机构地区：[1]东南大学预应力工程研究所,南京210018

出　　处：《建筑结构学报》1999年第2期60-67,共8页Journal of Building Structures

基　　金：国家自然科学基金!(59338130)

摘　　要：本文在分析超静定结构进行弯矩调幅所需的塑性铰转动能力基础上指出，超静定预应力混凝土结构的临界截面一般具备所需的转动能力，但是，允许调幅值与抗裂度要求有很大的关系。研究表明，在抗裂度要求较高的情况下，考虑内力重分布并没有经济意义。Based on the calculations in the analysis of the plastic rotation capacity needed for moment redistribution of PC statically indeterminate structures, it is pointed out that there are generally sufficient rotation capacities in each section of PC statically indeterminate structures, and the extent of moment modulation is largely dependent on the degree of crack-resistance. If the degree of crack-resistance needed in PC statically indeterminate structure is higher, then the consideration of moment redistribution is quite insignificant in determining the total reinforcements and tendons.

关 键 词：预应力混凝土 超静定结构 弯矩调幅 抗裂度 

分 类 号：TU378.01[建筑科学—结构工程]