多层冷藏库钢筋混凝土楼盖温度收缩应力分析

Analysis on Temperature Constriction Stress of Reinforced Concrete Building Cover of Multi layers cold Store

钢筋混凝土无梁楼盖，由于温差及收缩产生的应力在设计中往往被略去，不进行计算，这对小型冷库设计可以简化。但对大型万吨级冷库，库房长度往往超过了规定的限值，温差及收缩应力就不容忽视，不仅引起楼盖被拉裂、拉断，柱子弯矩加大，裂缝明显加宽，甚至使结构造成严重后果。

： The stress brought by difference in temperature and constriction of the reinforced concrete building cover without girders were always ignored in the design， which could predigest the design of the minitype cold store． But for the large cold store， the storecroom length usually beyond the value limited， the difference in temperature and constriction stress should not be ignored， because the stress will lead to ripping， snapping of covers， increasing the flexural torque of the pillars， obviously widenning the cracks， and badly destoried the structures．