摘要
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 study the performance on progressive collapse resistance of a novel torus-dome tensile structure,which consists of a surrounding tensegrity torus and a central Levy type cable dome,due to cable rupture,the numerical model for the torus-dome tensile structure was fabricated by the self-compiled vector form intrinsic finite element（ VFIFE） program based on the analysis of static and dynamic characteristics. With the consideration of the initial statue,the dynamic responses of the remaining structures after the rupture of different types of cables were simulated by the full dynamic equivalent load transient unloading method,including the configuration changes,the nodal displacements and the internal forces of cables and so on. The analysis results showthat the VFIFE method can be used to effectively analyze the dynamic response due to local cable rupture. The rupture of tensegrity torus mainly influences adjacent cables and does not form progressive collapse. The rupture of the cable dome affects the tensegrity torus limitedly. The torus-dome tensile structure exhibits good performance to resist progressive collapse due to the cable rupture.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第5期1057-1062,共6页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51208263
51308105)
关键词
环箍穹顶全张力结构
断索
连续倒塌
向量式有限元
动力放大系数
torus-dome tensile structure
cable rupture
progressive collapse
vector form intrinsic finite element
dynamic magnification factor
