横向加劲单曲悬索屋盖的非线性及动力反应分析
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摘要
本文对横向加劲单曲悬索屋盖进行了研究。它是由柔性材料组成的索和加劲构件构成的。这里加劲构件可以是空间桁架或空间梁。本文采用空间桁架作为加劲构件，把索离散为空间直线索单元，并假设它只能承受拉力而不能承受压力，再利用最小势能原理推导了考虑索单元几何非线性的单元刚度方程。把桁架离散为空间杆单元，在动力分析部分考虑了结构在地震力作用下的无阻尼强迫振动。并讨论了结构各种设计参数的变化对结构的影响，得出了有益的结论。
In this paper the single curvature suspended roofs with transverse rib are discussed. It is composed of flexible cables and stiffening components. The transverse rib stiffening components may be space trusses or space girders. Here the space trusses are taken as transverse rib. The cable is discretized into space linear cable element and it is assumed that the cable can transmit tension only. The nonlinear finite element equations are deduced. The trusses are discretized into space bar elements. In the part of dynamic analysis, the undamped forced vibration of structure under seismic loading is considered. And the influence of variation of structural designing parameters on the structure is discussed, and then some helpful conclusions are given.
In this paper the single curvature suspended roofs with transverse rib are discussed. It is composed of flexible cables and stiffening components. The transverse rib stiffening components may be space trusses or space girders. Here the space trusses are taken as transverse rib. The cable is discretized into space linear cable element and it is assumed that the cable can transmit tension only. The nonlinear finite element equations are deduced. The trusses are discretized into space bar elements. In the part of dynamic analysis, the undamped forced vibration of structure under seismic loading is considered. And the influence of variation of structural designing parameters on the structure is discussed, and then some helpful conclusions are given.
引文
1］哈尔滨建筑工程学院．大跨度房屋钢结构．北京：中国建筑工业出版社，1985．［2］KrishnaPrem．Cable－SuspendRoofs．1978．［3］ImivneH．Max．Cable－Structure．Cambridge，Massachusets，andLondon，England：TheMITPress，1981．［4］沈世钊．十年来中国悬索结构的发展．第六届空间结构学术会议论文集．北京：地震出版社，1992
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