【摘要】 以具有实际工程意义的40m跨度K8型单层球面网壳为研究对象,在分析单层网壳结构在水平阶跃荷载作用下动力失稳过程的基础上,探讨了网壳结构的动力稳定性临界荷载的判定方法,研究了矢跨比、弹塑性、阻尼和初始几何缺陷等因素对网壳结构动力稳定性临界荷载的影响,并进一步分析了水平阶跃荷载与水平静荷载及水平地震荷载作用下的稳定性临界荷载之间的关系.更多还原

【Abstract】 The dynamic stability of single-layer reticulated domes under horizontal sudden load is discussed.A practical method for researching dynamic stability of single-layer reticulated domes is put forward.A compre-hensive numerical analysis on dynamic stability behavior of some proto-type single layer reticulated domes is carried out with the following primary parameters:various rise-to-span ratios;different constitutive relation of steel;different initial geometric imperfections and damp effect.The quantity relationship of critic loads of sin-gle-layer reticulated domes under horizontal sudden load?static load and earthquake action is discussed.Some conclusions worthy to note are achieved.更多还原