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悬臂平面桁架的特点,是自重轻,用料省,制作方便,且具有较好的建筑效果.因此,在悬臂结构的建筑中,它是常被采用的一种结构形式。大跨度悬臂平面桁架的静力计算已被人们所熟悉,但对其动力特点的研究尚少.本文在山西某飞机库所采用的悬臂平面桁架屋盖的基础上,改变设计参数,构造了七种不同的结构,按28个工况进行了计算机分析,以期揭示设计参数对结构抗震性能的影响规律,探讨符合工程设计的实用计算方法。一、计算简图结构的抗震性能是由它的刚度、质量、阻尼及其分布决定的。而这些因素往往又与荷载、结构形式、跨度等设计参数直接有关。为此,在某飞机库所采用的悬臂平面桁架屋盖结构的基础上(如图1),改变设
The characteristics of cantilever plane truss is that it is light weight, easy to use, easy to manufacture and has good construction effect, therefore, it is often adopted as a structure in the construction of cantilever structure. The static calculation of long-span cantilever plane truss has been well-known, but its dynamic characteristics are still few.In this paper, based on the cantilever plane truss roof used in a hangar in Shanxi Province, the design parameters are changed and seven Different kinds of structures were analyzed by computer in 28 working conditions in order to reveal the influence of design parameters on the seismic performance of the structure and to explore the practical calculation method in line with engineering design. First, calculate the seismic performance of the structure is determined by its stiffness, mass, damping and its distribution. These factors are often directly related to design parameters such as load, structure and span. To this end, in a hangar used cantilever plane truss roof structure (Figure 1), change the set