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(同濟大學土木工程學院 上海 200092)
【提要】 基于初始狀態(tài)確定理論，針對鄭州國際會展中心鋼屋蓋的矩形單元，借助ANSYS軟件，研究了預張力對結構的靜力、動力和穩(wěn)定性能的影響，考察內容包括整體剛度、受力分布、自振特性、穩(wěn)定安全系數以及屈曲模態(tài)等。認為預張力的靜力效應可以按照線性理論進行設計，預張力對動力性能的影響不大，對于穩(wěn)定性能的影響要兼顧多方面的考慮。為斜拉索拱體系在初始狀態(tài)下的預張力取值提供了設計依據。
【關鍵詞】 斜拉索拱 初始狀態(tài) 預張力影響 設計建議
Influence Analysis of Pretensions on Mechanical Performances of Spatial Cablehybriad Structure in a Conference Exhibition Center/Ren Junchao,Zhang Qilin(School of Civil Engineering,Tongji University,Shanghai 200092,China)
Abstract:Based on the determination theory of initial configuration， the effects of pretensions on the static,dynamic and stable structural performances of a rectangular unit of steel roof in Zhengzhou International Conference Exhibition Center of stayed pretensions cablearch are analyzed by using ANSYS,including the stiffness,force distribution,selfvib
ration properties,stability safety coefficients and buckling shapes,etc. The results indicate that pretensions static effects can be designed according to linear theory and the influences of pretensions on dynamic performances may be ignored. Some factors should be taken into account when analyzing the influences of pretensions on stable performances. The result proposes the design basis for the cablearch structures.
Keywords:stayed cablearch; initial configuration,pretension effects; design suggestion