论文部分内容阅读
为了探究一种由周边环形张拉整体和中部索穹顶组成的新型环箍穹顶全张力结构局部断索的抗连续倒塌性能,在分析其静力及动力特性的基础上,利用自编向量式有限元程序建立了环箍穹顶索杆张力结构的数值模型.考虑结构初始状态,采用等效荷载卸载法分析得到了该结构不同类型拉索破断后剩余结构的动力响应,包括结构位形、节点位移及构件内力等.分析结果表明,利用向量式有限元法能够有效地进行结构局部断索后的动力响应分析;张拉整体单元的拉索破断主要影响所在单元附近的拉索,不会形成连续倒塌;索穹顶内部的拉索破断对周边张拉整体结构影响较小,新型环箍穹顶索杆张力结构具有较好的抗连续倒塌性能.
In order to investigate the anti-continuous collapse performance of a partial breakage of a new type of hoop dome consisting of a circumferential annular tensioned body and a central cable dome, based on the analysis of static and dynamic characteristics, The numerical program is used to establish the numerical model of the tension structure of the cable hoop dome.According to the initial state of the structure, the dynamic response of the remaining structure after the different types of cables are broken is analyzed by the equivalent load unloading method, including the structure configuration, And component internal forces, etc. The analysis results show that the dynamic response analysis after structural partial fault can be effectively carried out by using the vector finite element method. The cable breaking of the integral unit mainly affects the cables in the vicinity of the unit and does not form a continuous Collapsing. The cable breaking inside the cable dome has little effect on the overall structure of the surrounding tension. The tension structure of the cable ring of the new type of hoop dome has better anti-continuous collapse performance.