Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection  

作　　者：Siu-Lai CHAN Yaopeng LIU Andy LEE 

机构地区：[1]Department of Civil and Structural Engineering,The Hong Kong Polytechnic University,Hong Kong,China [2]Ove Arup and Partners(Hong Kong)Limited,Hong Kong,China

出　　处：《Frontiers of Structural and Civil Engineering》2010年第3期376-382,共7页结构与土木工程前沿（英文版）

基　　金：the support of the Research Grant Council of the Hong Kong Government on the project“Advanced Analysis Allowing for Load and Construction Sequences”funded jointly by Construction Industry Institute-Hong Kong(CII-HK);the Hong Kong Polytechnic University and“Advanced Analysis for Progressive Collapse and Robustness Design of Steel Structures”(PolyU 5115/07E).

摘　　要：Pre-tensioned high strength trusses using alloy steel bar are widely used as glass wall supporting systems because of the high degree of transparency.The breakage of glass panes in this type of system occurs occasionally,likely to be due to error in design and analysis in addition to other factors like glass impurity and stress concentration around opening in a spider system.Most design does not consider the flexibility of supports from finite stiffness of supporting steel or reinforced concrete beams.The resistance of lateral wind pressure of the system makes use of high tension force coupled with the large deflection effect,both of which are affected by many parameters not generally considered in conventional structures.In the design,one must therefore give a careful consideration on various effects,such as support settlement due to live loads and material creep,temperature change,pre-tension force,and wind pressure.It is not uncommon to see many similar glass wall systems fail in the wind load test chambers under a design wind speed.This paper presents a rigorous analysis and design of this type of structural systems used in a project in Hong Kong,China.The stability function with initial curvature is used in place of the cubic function,which is only accurate for linear analysis.The considerations and analysis techniques are believed to be of value to engineers involved in the design of the structural systems behaving nonlinearly.

关 键 词：tension system glass wall nonlinear analysis pre-tensioning second-order analysis 

分 类 号：TG1[金属学及工艺—金属学]