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钢筋混凝土构件裂缝给人们带来危险感,而有些裂缝又难以控制。构件产生裂缝的原因有各种各样:有的裂缝是人为造成的;有的是原材料质最欠佳造成的;还有一种不引起我们重视的裂缝,那就是温差应力产生的裂缝。大庆市龙凤体育馆钢筋混凝土框架梁的裂缝就是其中一例。体育馆框架混凝土浇筑完已是10月末,由于季节限制,屋盖和围护墙未能施工,这时气温平均达到了-5℃,因此只能冷过冬。在安排框架混凝土施工计划时,考虑到不能将屋盖和围护墙施工完,温度变化会给结构带来影响;因此施
Cracks in reinforced concrete components give people a sense of danger, and some cracks are difficult to control. There are various reasons for the cracking of components: some cracks are caused by humans; some are caused by the poorest quality of raw materials; and there are cracks that do not cause us to pay attention to, that is cracks generated by temperature differential stress. One example is cracks in reinforced concrete frame beams at Longfeng Stadium in Daqing City. The concrete construction of the gymnasium frame was completed in late October. Due to seasonal restrictions, the roof and the retaining wall could not be constructed. At this time, the temperature reached an average of -5°C. Therefore, it was only possible to spend the winter cold. In arranging the framework concrete construction plan, considering that the roof and the retaining wall cannot be constructed, the temperature change will affect the structure; therefore