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地下钢筋混凝土构筑物一般在正温度下施工。从混凝土凝结到构筑物使用,在大多数情况下温度提高的场合是不多的,而此时产生的压应力可以不予考虑。实际上必须考虑温度的降低,因为此时在钢筋混凝土中产生拉应力,会出现裂缝。本文仅研究温度降低时产生中心受拉的地下构筑物,同时在未出现裂缝的钢筋混凝土中应当控制混凝土的拉应力,而在出现裂
Underground reinforced concrete structures are generally constructed at a positive temperature. From concrete condensation to the use of structures, in most cases the temperature increase is not the occasion, but at this time the compressive stress can not be considered. In fact, a reduction of the temperature must be taken into account because of the tensile stresses that occur in the reinforced concrete at this time and cracks. In this paper, we only study the underground structures with central tension when the temperature decreases. At the same time, the tensile stress of concrete should be controlled in the reinforced concrete without cracks.