884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 西南交通大學(xué)土木工程學(xué)院， 成都 610031；2 四川水利職業(yè)技術(shù)學(xué)院， 成都 611230)

［摘要］ 高層CFST斜交網(wǎng)格筒結(jié)構(gòu)體系具有較大的水平側(cè)向剛度，可以大幅減少水平荷載作用下的結(jié)構(gòu)水平位移響應(yīng)，其結(jié)構(gòu)的延性性能也備受關(guān)注。據(jù)此，為了研究斜柱的徑厚比、軸壓比，結(jié)構(gòu)的高寬比以及是否設(shè)置屈曲約束支撐對(duì)高層CFST斜交網(wǎng)格筒結(jié)構(gòu)的延性影響，并基于Pushover方法分析其對(duì)結(jié)構(gòu)延性的影響程度。研究表明：隨著斜柱徑厚比增大，結(jié)構(gòu)側(cè)向位移和層間位移角減小，結(jié)構(gòu)延性系數(shù)減小。斜柱軸壓比越大，結(jié)構(gòu)側(cè)向位移和層間位移角越小，結(jié)構(gòu)延性系數(shù)越小。結(jié)構(gòu)的高寬比越大，結(jié)構(gòu)側(cè)向位移越大，結(jié)構(gòu)延性系數(shù)越小。在結(jié)構(gòu)模型構(gòu)件截面尺寸保持一致的情況下，設(shè)置屈曲約束支撐可大幅提高結(jié)構(gòu)延性，建議視工程具體情況合理設(shè)置局部屈曲約束支撐。 

［關(guān)鍵詞］斜交網(wǎng)格筒結(jié)構(gòu)；Pushover分析；結(jié)構(gòu)延性；抗震性能；鋼管混凝土

中圖分類號(hào)：TU973 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)13-0037-08

Influence factors analysis on ductility of CFST diagrid tube structure in high-rise buildings 

LIU  Chengqing1,  DUAN  Suli1,  FANG  Dengjia1,  XIA  Chunlan2 

(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031， China；2 Sichuan Water Conservancy Vocational College, Chengdu 611230， China) 

Abstract: The high-rise CFST (concrete filled steel tubular) diagrid tube structural system has large lateral stiffness, which can greatly reduce the horizontal displacement response of the structure under horizontal load. While, its ductility has attracted much attention of scholars. Therefore, in order to study the influence factor such as diameter-thickness ratio, axial compression ratio of inclined column, aspect ratio and buckling restrained brace of structures on the ductility of high-rise CFST diagrid tube structure, the influence degree on the structural ductility was analyzed based on Pushover analysis. The results show that the larger the diameter-thickness ratio, the smaller the lateral displacement and inter-story drift ratio, and the smaller the ductility coefficient of the structure. The larger the axial compression ratio of inclined column, the smaller the lateral displacement and inter-story drift ratio of the structure, and the smaller the ductility coefficient of the structure. The larger the aspect ratio, the larger the lateral displacement of the structure, and the smaller the ductility coefficient of the structure. The structural ductility with buckling restrained brace is greatly improved when the section size of the structure model remains the same. It is suggested that the local buckling restrained braces should be set reasonably according to the specific conditions of the project. 

Keywords:diagrid tube structure； Pushover analysis； structural ductility； seismic performance; concrete filled steel tubular

*國家自然科學(xué)基金項(xiàng)目（51778538），國家留學(xué)基金委項(xiàng)目（201707005100）。

 作者簡介：劉成清，博士，副教授，博士生導(dǎo)師，Email：lcqjd@swjtu.edu.cn。