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环向折线形圆形平面网架是矩形平面单向折线形网架在圆形、圆环形建筑平面中的推广应用.通过结构构形研究和机动分析,论证了环向折线形圆形平面网架的基本结构体系是一种静定的空间桁架结构,提出了在轴对称荷载下基本结构体系的简化计算模型及其简捷分析法,推导求得了网架杆件内力的递推计算公式.为考虑与下部支承结构的协同工作,给出了弹性支承时的分析方法.对基本结构体系增设若干道环向杆件,可形成环向折线形圆形平面网架的加强结构体系,可提高结构的刚度、改善受力特性,根据相应的简化计算模型也可方便求得网架的杆件内力和节点位移.为方便工程设计应用,在常用轴对称荷载作用下,选取若干结构参数编制了环向折线形圆形平面网架基本结构体系的杆件内力实用算表.文中附有算例二则.
The circularly folded circular planar truss is a generalized application of the rectangular planar unidirectional crease truss in the circular and circular building plane.According to the structural configuration and the maneuver analysis, The basic structure system of the grid is a kind of static space truss structure. The simplified calculation model of the basic structure system under axial symmetry load and its simple analysis method are proposed. The recursive formula of the internal force of the grid structure is derived. In order to consider the collaborative work with the lower support structure, an analysis method for elastic support is given.With a number of ring-shaped bars added to the basic structure system, a reinforced structure system with a circular, circular, circular planar grid can be formed, which can be improved Structure stiffness and improve the force characteristics, according to the corresponding simplified calculation model can also be easily obtained grid internal force and node displacement.For the convenience of engineering design and application, under the common axisymmetric load, select a number of structural parameters compiled The utility model of the internal force of the rod of the basic structural system of the circularly folded circular planar grid system is attached.