摘要
结构试验台座一般尺寸都较大,属于大体积砼,施工浇筑砼后,将产生大量水化热,致使台座底板升温和膨胀。降温时,由于地基约束作用,台座砼将产生收缩应力,易发生贯穿性裂缝。本文建议设计时应进行考虑施工因素的砼抗裂性验算,并提出了计算的方法。
The bottom slab of the foundation of t he structural laboratory whose dime nsion is a large vol-ume concrete.It produces significa nt quantities of hydration heat afte r the concrete is placed.When temperature reduced,the concrete o f the bottom slab will produce shrinking stress because of the restraint of the subsoil.In order to prevent th e penetrating cracks in constructio n,a way of checking computation is given.
