局部混凝土收缩对壳体圆仓影响的研究

Effects of partial contraction on concrete shell silo

由于施工条件和方法的限制,混凝土壳体圆仓的肋与板产生了不同收缩,破坏了原壳体结构自身的力的平衡。由于收缩受到钢筋的抑制,从而促进了壳体内部微裂缝的形成和发展,影响了结构的部分承载能力。本文根据温度和收缩对结构影响的相似性,建立了温度和收缩的转换模型,并进行了数值计算,结果表明该方法具有一定的精度。

Because of condition and method of construction,the ribs and plates of concrete sbell silo contracted differently.It destroyed the force balance of shell structure.The contraction that is restrained by steel bars helped the inter-crack formed and developed.The bearing capacity of the structure was affected partly.In virtue of comparability of contraction and temperature,the changed model was set up to make FEM analysis.The results show that the method is effective.