钢板-混凝土组合剪力墙混凝土开裂原因分析  

Analysis of the Concrete Cracking Reason in the Steel-concrete Composite Shear Wall

作　　者：庞二波[1] 刘通[1] 周文俊[1] 陈超[1] 

机构地区：[1]中建商品混凝土有限公司,湖北武汉430074

出　　处：《施工技术》2014年第24期13-18,共6页Construction Technology

基　　金：高强高性能混凝土超高泵送混凝土配制技术与测试评价体系的综合研究(CSCEC-2013-05)

摘　　要：结合目前超高层建筑中通常采用的钢板-混凝土组合剪力墙结构特点,介绍了该类结构的开裂因素,并采用数学方法描述了钢板与混凝土在水化阶段的变形协调性问题;讨论了钢板初始温度与混凝土浇筑温度差异的3种情况;对钢板与混凝土相互约束状态下的应变发展规律进行较为详细的阐述,指出应变发展规律与温度发展规律基本一致,混凝土在温升阶段产生拉应力,降温阶段产生压应力,并逐步消除温升阶段积累的拉应力;在数学分析基础上提出了该类结构的防裂要素,并结合工程实例进行了初步验证。Combined with the steel-concrete composite shear wall structure characteristics used in highrise buildings,the cracking factors of this kind of structure are described,and mathematical methods are used to describe deformation compatibility problems of the steel and concrete in full water phase. Three kinds of situation of difference between plate initial temperature and concrete pouring temperature are discussed. It points out that the development law of strain and temperature is consistent,tensile stress produces in the rising stage,compressive stress produces in the cooling stage and gradually eliminates the tensile stress. Based on the mathematics analysis,the crack control elements of this kind of structure are put forward,which is verified with an engineering example.

关 键 词：混凝土 剪力墙 大体积混凝土 高强混凝土 开裂 变形协调 

分 类 号：TU398.9[建筑科学—结构工程]