徐州轨道交通地下车站侧墙结构高性能混凝土早期抗裂性能研究

Research on the Early Anti-cracking Capability of High Performance Concrete of Sidewall Structure in Xuzhou Rail Transit Underground Station

在试验研究高性能混凝土关键热力学参数的基础上,采用基于"水化-温度-湿度-约束"多场耦合机制的抗裂性评估理论与方法,结合城市轨道交通工程主体结构形式,计算分析了徐州轨道交通地下车站侧墙结构早期混凝土的温度及开裂风险的变化过程,据此提出了混凝土抗裂方案,并在徐州市城市轨道交通工程2号线市政府站主体结构进行了示范应用,取得了良好的效果。

In this paper,based on the experimental investigations of key thermodynamic parameter,the hygro-thermochemo-mechanical coupling theory and the finite element method were applied to study the crack resistance for sidewall structure in underground station of Xuzhou rail transit,which can obtain the history of temperature,strain,stress,and crack risk,so that the concrete anti-cracking scheme was proposed. And it has been applied in the actual structure which was improved that it's effective to inhibit cracking.