桥梁承台混凝土温度应力场及裂缝控制

Thermal Stress and Crack Control of Bridge Bearing Platform Concrete

以连霍高速公路G30果子沟斜拉桥为研究对象,分析了西北高寒地区桥梁承台大体积混凝土因温差引起裂缝病害的成因,给出了控制措施.使用ANASYS仿真分析方法剖析了桥梁承台大体积混凝土温度应力场的分布规律以及裂缝产生的机理.结果表明：桥梁承台大体积混凝土绝大部分出现压应力,模型效果与工程实际吻合良好.

With Lian-Huo expressway（G30 cable-stayed bridge） as the research object,the control measures and the reasons of bridge bearing platform mass concrete crack diseases which was caused by temperature difference in northwest alpine region were researched.Through using the ANASYS simulation analysis method,the thermal stress distribution and crack formation mechanism of the bridge with mass concrete were analyzed.Results indicated that most of the mass concrete appeared compressive stress,and the model results accorded with theoretical and engineering application.