一种RC构件裂缝宽度计算通用方法  

A general method for calculating crack width of RC members

作　　者：冉志红 陶蜀昆 林帆 施静娴[2] RAN Zhi-hong;TAO Shu-kun;LIN Fan;SHI Jin-xian(School of Urban Architecture and Urban Planning,Yunnan University,Kunming 650091,China;Oxbridge College,Kunming University of Science and Technology,Kunming 650106,China)

机构地区：[1]云南大学建筑与规划学院,云南昆明650091 [2]昆明理工大学津桥学院,云南昆明650106

出　　处：《云南大学学报（自然科学版）》2020年第1期66-72,共7页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(51968074)

摘　　要：现行规范对规则截面、单向受力有详细的裂缝宽度计算方法及公式.对于截面形状特殊、受力形式多样的钢筋混凝土构件,其裂缝宽度计算比较复杂,没有相应的计算公式.无论是铁路桥梁的容许应力法还是公路桥梁、建筑结构的极限状态法,给出的裂缝宽度计算公式针对的是单向偏心受力状态.从混凝土结构设计基本原理出发,结合有限细分的思路,提出双向偏心钢筋混凝土构件应力计算和裂缝宽度计算的数值分析方法.通过几个算例对比计算表明,文中所提出的方法具有较好的工程实用性.The present design code has a detailed formula for calculating the crack width of regular sections and unidirectional forces. For reinforced concrete members with special shape and various forms of force, the calculation of crack width is rather complicated and there is no corresponding formula. Whether the allowable stress method of the railway bridge or the limit state method of the highway bridge and the building structure, the calculation formula of the crack width is aimed at the unidirectional stress state. Based on the principle of concrete structure design, combined with the thought of finite subdivision, the numerical analysis method of stress calculation and crack width calculation for two-way eccentric reinforced concrete members is proposed. Several examples show that the proposed method has good engineering practicability.

关 键 词：结构工程 钢筋混凝土构件 裂缝宽度 有限细分 容许应力法 

分 类 号：TU312[建筑科学—结构工程]