不同系列水泥混凝土高温性能实验比较研究

Comparison Test of High Temperature Performance of Different Series Concrete

随着城市化的不断扩大,高层和超高层的现代化建筑不断涌现。体型巨大的建筑物在建筑材料、空间体型、功能布局、结构布置及附属设施都与传统建筑物有很大区别,给防火带很多新的问题。一旦火灾发生,在高温环境下混凝土的寿命及稳定性迅速下降,加速了混凝土的结构支撑能力失效,因此要求建筑物在火灾高温条件下要保持一定的稳定性,可发生一定的变形但建筑物不能倒塌,以保证人员安全撤。为了建筑工程的抗火结构设计,研究火灾高温条件下混凝土受热高温后其内部损伤程度、物理力学性能下降程度是必要的。

With expanding of the urbanization, high and ultra-high modern buildings are emerging. Building materials, space size, functional layout, structural arrangement and ancillary facilities of huge size buildings are very different from the traditional building, which can bring a lot of new problems to the fireproof. In case of fire, life and stability of concrete under high temperature environment can rapidly decline, which will accelerate the failure of concrete structural support capability. Thus buildings are required to maintain certain stability under fire conditions to ensure the buildings not to collapse under certain deformation, in order to guarantee the safe evacuation. So it is necessary to study internal damage level and decline degree of physical and mechanical properties of concrete under fire high temperature condition.