钢筋混凝土板徐变收缩应力重分布计算  

CALCULATION FOR STRESS REDISTRIBUTION OF CREEP AND SHRINKAGE IN REINFORCED CONCRETE SLABS

作　　者：杨应恩 李鹤翔 杨天元 YANG Yingen;LI Hexiang;YANG Tianyuan(Faculty of Engineering and Technology,Baoshan University,Yunnan Baoshan 678000,China;Yunnan Institute of Civil-military Integration Development,Kunming 650000,China;Sichuan Architectural Design and Research Institute,Kunming 650031,China)

机构地区：[1]保山学院工程技术学院,云南保山678000 [2]云南省军民融合发展研究院,昆明650000 [3]四川省建筑设计研究院昆明分院,昆明650031

出　　处：《低温建筑技术》2019年第8期80-84,共5页Low Temperature Architecture Technology

摘　　要：针对钢筋混凝土板收缩和徐变应力重分布的计算问题,文中采用特劳斯德代数本构,以钢筋混凝土单向板截面为研究对象,根据变形协调条件推导了重分布轴力和弯矩的方程组,得到重分布内力的解析表达式。徐变和收缩导致的重分布内力自相平衡,这一规律可以验证计算结果的正确性。通过算例分析了重分布内力随时间变化的特征,同时分析了收缩裂缝的力学特性。To calculate stress redistribution of creep and shrinkage in reinforced concrete slabs, we researched an section of one-way concrete slabs based on algebraic constitutive equation of Heinrich Trost. We established and solved equations about redistribution of bending moments and normal forces based on compatibility conditions. The redistribution of internal forces of creep and shrinkage can result in self-equilibrium, which can be applied to check the result of calculation. The characteristics of internal forces redistributed over time will be researched in example analysis. Besides, the mechanical characteristics of crack caused by shrinkage will be analyse simultaneously.

关 键 词：徐变 钢筋混凝土单向板 代数本构 应力重分布 

分 类 号：TU375.2[建筑科学—结构工程]