可传递压应力和剪应力的咬合式地下室楼盖变形缝设计

Design of bite-type basement floor structure deformation joint transferring compressive stress and shear stress

介绍了一种凹凸折板咬合式变形缝构造。通过对3个不同简化模型进行应力分析,考察了凹凸折板咬合式变形缝对楼盖拉应力的释放效果;同时为考察设置凹凸折板咬合式变形缝结构地下室楼盖作为上部结构嵌固端的受力性能,采用SAP2000软件对上述3个不同简化模型进行小震非线性动力时程分析。结果表明,该变形缝在释放超长地下室楼盖拉应力同时,可以传递其两侧楼盖的压应力、剪应力,以满足地下室楼盖作为上部结构嵌固端的要求;同时,也使该楼盖可以作为地下室两侧壁的水平支撑来平衡地下室两侧水土压力。最后,对凹凸折板咬合式变形缝在实际工程中的应用效果进行了介绍。

A concave convex folded plate bite-type deformation joint structure was introduced. Based on stress analysis on three different simplified models,the release effect of the concave convex folded plate bite-type deformation joint structure on floor tensile stress was investigated. At the same time,in order to inspect mechanical performance of setting concave convex folded plate bite-type deformation joints as the embedded end for upper structure,SAP2000 software was used to carry out nonlinear dynamic time-history analysis on the three different simplified models under frequent earthquake.Results show that the deformation joint can release tensile stress of super-long basement floor and can transfer the compressive stress and shear stress of floors on both sides at the same time,to meet the requirement of making basement floor as the embedded end of upper structure. At the same time,the floor can be used as the horizontal support for side walls of the basement to balance the soil and water pressure on both sides of the basement. Finally,the application effect of concave convex folded plate bite-type deformation joint in practical engineering was introduced.