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中文摘要：
张弦桁架结构在我国火车站无站台柱雨棚工程中的应用日渐增多。以北京北站站台张弦桁架雨棚为例,研究该类结构在恒荷载及风荷载作用下,结构受力性能随各参数的变化规律。结果发现：结构中拉索的垂距及轴向刚度能显著改善结构在恒载作用下各方面的力学性能。相比于恒荷载,结构对风荷载更为敏感,通过改变结构矢高、垂距,拉索截面积等参数可优化结构在风荷载作用下的受力性能。在结构性能研究的基础上,提出适宜工程应用的张弦桁架结构优化设计方法和步骤,并结合北京北站张弦桁架结构介绍该优化设计步骤的具体应用过程。
英文摘要：
Truss string structure is applied more and more to platform canopy of railway stations. Taking truss string structure of Beijing North Railway Station for example, the relationship between mechanical behavior and structural parameters are researched, from which it has been found that vertical distance and axial stiffness of the cable can greatly improve the structural mechanical properties under dead-load. Compared to dead-load, truss string structure is more sensitive to wind-load, research show that structural wind-resistance performance can be optimized through changing the vector high, cable-vertical distance and sectional area, etc. Based on the results of the structural performance research, the optimization design method for truss string structure is proposed, and this method has been applied to the canopy of Beijing North Railway Station successfully.
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A vector-form hybrid particle-element method for modeling and nonlinear shell analysis of thin membr
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