【作者】 孙芬；

【导师】 王元清；

【作者基本信息】 清华大学 ， 土木工程， 2005， 硕士

【摘要】 点支式玻璃建筑单层索网体系是一种新型的柔性玻璃幕墙体系,因其具有通透性好、轻盈美观和施工灵活等特点得到广泛应用。目前对单层索网的设计和分析一般不考虑玻璃的贡献,本文考虑玻璃和索网的相互作用,对单层索网体系承载性能的影响因素进行分析,并研究玻璃刚度的贡献。结合北京新保利大厦二期工程单层索网幕墙的投标方案,设计了1:10比例的试验模型,对该模型的预应力施加过程以及承载性能进行研究。本文的主要内容包括:1.点支式玻璃建筑单层索网体系承载性能的影响因素分析:建立考虑玻璃和索网节点约束刚度的有限元模型,采用该模型计算值与相关试验和计算结果进行比较,分析该模型的可靠性,并初步确定一定条件下节点约束刚度的取值。对玻璃和索网结构共同工作的单层索网幕墙承载的影响因素进行分析,并研究在不同影响因素下玻璃刚度的贡献。2.对北京新保利大厦二期工程的试验模型进行预应力施加和承载性能研究:完成该模型玻璃幕墙的设计,分级进行预应力施加,监控该过程中索力变化,探讨张拉方法的可行性;在分级预应力下以及安装玻璃前后对索网幕墙施加水平荷载,测量索网结构的承载和变形,分析预应力和玻璃刚度的影响。3.对试验模型进行有限元建模分析,通过和试验结果的对比,验证有限元计算模型的可靠性。对于玻璃和索网共同承担荷载,有限元计算中考虑玻璃作用,对模型中考虑玻璃滑移和不考虑滑移两种计算结果进行讨论,并结合该试验对本文提出的玻璃和索网节点约束模型进行探讨。4.对北京新保利大厦二期工程单层索网幕墙进行方案设计和分析,对索网幕墙的承载和变形进行验算,并结合该工程的设计对规范中提出的变形控制指标进行讨论。以上研究成果。为点支式玻璃建筑单层索网体系技术的发展,规范的修订和工程设计提供参考。更多还原

【Abstract】 Monolayer cable net is a new kind flexible point supported system andused widely for its fine transparence, light weight and flexible constructionetc. Now in the design and analysis of monolayer cable net, the contributionof glass is not considered. In this paper, the interaction between glass andcable net is considered. The factors which determine the loading capacity ofmonolayer cable net and the contribution of glass are studied. Referring to theschematic design of monolayer cable net for point supportd glass curtain wallof Beijing New Poly Plaza, a scale of 1:10 test model was devised and built inthe structural engineering laboratory of Tsinghua University. The process ofpretension was carried out and the loading capacity of the cable net wasresearched. The contents are as follows:1. Factors analysis on loading capacity of monolayer cable net: Restraintrelationship between glass and cable net is simulated and the calculationresults of the finite element model are compared with the correlativeexperiment and calculation result. The factors determining loading capacity ofmonolayer cable net under different restraint ability of joints are analysed andthe contribution of glass is summarized.2. Study on prestressing and loading capacity of the test model of BeijingNew Poly Plaza: The process of pretension of the test model is simulated. Thedeflection of cable net and the cable force under horizontal load at differentprestress phases and after installing the glass are measured. Then influence ofprestress and rigidity of glass is analysed.3. By comparing the analysis results by the finite element model and thetest data, the reliability of the model is verified. The case with and withoutconsideration of the glass slipping are compared when the rigidity of glass isincluded in the model. The model with restraint joint between glass and cablenet is also discussed.4. The paper also introduces the schematic design of glass curtain wall ofBeijing New Poly Plaza and discusses the deflection control of the code.All the results described above provide some references for thedevelopment of monolayer cable net for point supported technology, revisionthe code and project design.更多还原