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混凝土收缩和温度变形是工程结构上不容忽视的问题,现行《混凝土结构设计规范》(GB50010)的主导处理方法还是限制混凝土结构的伸缩缝间距,而用户的要求或为结构设计上的便利,实际工程往往突破了规范的限值。目前对伸缩缝间距超过规范标准的情况,处理方法基本上都是着力于抵抗变形或减小混凝土材料的收缩。本文提出一种新的方法——单柱双梁法,此方法着眼点不是如何延长伸缩缝的间距,而是在规范规定的伸缩缝允许间距范围内,通过在限定的部位释放掉混凝土的收缩应力和温度应力,以达到控制结构的收缩和温度变形,方法简单,作用可靠。
Concrete shrinkage and temperature deformation of the project structure can not be ignored, the current “Concrete Structure Design Code” (GB50010) the dominant approach is to limit the expansion of concrete structures spacing, and the user’s request or structural design convenience, the actual Projects often exceed the regulatory limits. At present, the gap between the expansion joints exceeds the standard case, the treatment is basically focused on the resistance to deformation or reduce the shrinkage of concrete materials. In this paper, a new method, single-column and double-beam method, is proposed. This method does not focus on how to extend the pitch of expansion joints. Instead, the method allows the shrinkage of the concrete to be released at a limited area Stress and temperature stress, in order to achieve control structure shrinkage and temperature deformation, the method is simple and reliable.