【作者】 马美玲；

【导师】 庄一舟；

【作者基本信息】 浙江大学 ， 防灾减灾及防护工程， 2004， 硕士

【摘要】 张弦梁结构是一种用撑杆连接抗弯构件和受拉构件而形成的自平衡体系。根据单榀张弦梁结构的不同布置形式可分为单向张弦梁结构、双向张弦梁结构和多向张弦梁结构等不同形式，其中单榀张弦梁结构的性能对整体结构的性能起决定性的作用，所以充分了解单榀张弦梁结构的性能非常重要。虽然张弦梁结构体系在实际工程中已经得到较多的应用，但其设计计算中还有一些问题没有很好地解决，例如确定结构的零状态放样几何尺寸、初状态结构预应力分布以及对于结构在荷载作用下的形状优化等；对于空间张弦梁结构的研究尚处于起步阶段。 本文主要对张弦梁结构的找形和受力性能进行了研究。文中首先对张拉结构中素的预应力引入方法进行了一定的探讨，提出了一种新的适合张弦梁结构初始形态确定的方法即初应变逆迭代法，并对其进行了算例验证；然后通过对影响结构性能的各主要参数进行受力性能分析，首次提出了结构的较优高跨比的概念，并从工程实例得到了验证，从而初步实现了结构在荷载态下形状优化；最后本文对空间双向张弦梁结构的受力性能进行了初步的研究，并把空间双向张弦梁结构的受力性能和单榀张弦梁结构进行了对比，得出一些有价值的结论。 通过本文研究工作，初步提出了关于张弦梁结构初状态和荷载态下找形的方法，并对空间双向张弦梁结构的受力性能进行了研究，本文研究有助于对空间张弦梁结构体系的应用。更多还原

【Abstract】 Beam string structure (abbrev. BSS) is an inner equilibrium system which bending resistance member and tension member is linked by brace strut. According the different disposing type in single BSS, there are unidirectional BSS , bi-directional BSS and multi-directional BSS etc, and the behavior of single BSS is determine to the whole body’s behavior. It is very important to understand the behavior of single BSS. BSS is widely applied in the engineering practice, but there are many problems haven’t solved perfectly in design and calculate. For example, no mature theory can be used for determination of stress distribution in initial equilibrium state and the initial geometry in geometry zero state till now; no mature theory can be used for the form optimization in loading equilibrium state till now; there are few study on the behavior of space BSS.In this paper, form-finding and mechanical behavior of BSS is studied. At first, based on discussing the introduce method of the prestress in cable, a new efficient method named initial strain inverse iteration method is put forward, and some calculation examples are done to evaluate the correct of this method; secondly, the better depth-span ratio is firstly presented on the base of analyzing the structural mechanical behavior in a variety parameter, so the form of BSS is optimized by the better depth-span ratio; at last, a tentative research is done on the mechanical behavior of space BSS. The research of this paper is good to apply the space BSS system.更多还原