- 摘 要
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藺建中 孫守榮 王 剛
(中國建筑西北設計研究院 西安 710003)[提要] 運用有限元程序，對某大學活動中心結(jié)構(gòu)的整體和局部構(gòu)件受力性能、薄弱部位及影響因素、大跨度屋蓋對主體結(jié)構(gòu)受力性能影響等問題進行了模擬分析。結(jié)果表明，結(jié)構(gòu)具有扭轉(zhuǎn)不規(guī)則和承載力突變特性，薄弱部位出現(xiàn)在錯層部位、轉(zhuǎn)角部位和弱連接部位；空曠框架部分存在著相對變形大和兩向內(nèi)力差異大現(xiàn)象，P-△效應明顯; 大跨度鋼屋蓋在水平力作用下對主體結(jié)構(gòu)有不可忽視的影響。闡述了有關(guān)設計方法。
[關(guān)鍵詞] 大開洞不規(guī)則結(jié)構(gòu) 結(jié)構(gòu)分析 受力性能 設計方法Behavior of Irregular Structure with Big OpeningsLin Jianzhong, Sun Shourong, Wang Gang(China Northwest Building Design Research Institute, Xi'an 710003, China)Abstract: For a thorough understanding of the overall and local structural behaviors of a university student sorts center, including weak parts and influence of large- span roof on the main structure, a finite element software are used to analyze the structure. The analysis result shows that the structure has torsion effect and the mutation of resistance ability. Weak parts appear in slit levels, corners and weak links. Opening part of the frameuork has relatively large deformation and big difference of the forces in two orthogonal directions. The P-△effect is obvious. Influence of large-span on the main structure under horizontal seismic effect is not negligible. The specifc design method is represented.
Keywords: irregular structure with big openings; structural analysis; force behavior; design method
