高层装配式斜支撑钢框架结构设计研究
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摘要
针对远大S30工程的高层装配式斜支撑钢框架结构体系,分别采用振型分解反应谱法和线性时程分析法对整体结构进行有限元分析,得到了结构在多遇地震作用下的内力和位移响应。进行了结构整体的弹性设计,总结了该结构体系的设计方法。按规范对柱与柱座法兰连接的承载力进行了计算,并通过有限元分析和试验研究进行了节点强度和刚度的分析与验证。对梁柱节点进行了试验,研究其刚度变化规律,提出了采用弹簧单元在整体结构中建立节点简化分析模型的方法。研究结果表明:该体系中轻型钢楼梯对整体刚度的影响可以忽略,计算时可不建模分析;结构抗震性能满足现行规范要求,结构侧向变形曲线介于框架结构和剪力墙结构变形曲线之间;斜支撑降低了节点区的应力,增大了结构体系刚度,起到了减小柱计算长度、增强梁柱节点和柱与柱座连接的作用;柱与柱座法兰连接设计既满足设计强度要求,又实现了柱的刚性连接,保证了柱承载力和刚度的连续性。
Aiming at the design of the high-rise prefabricated steel frame with inclined braces,which was applied in the S30 project of Broad Group,the methods of mode-superposition response spectrum and time history analysis were used for the finite element numerical simulation of the whole structure,and the stress and displacement responses under frequent earthquakes were obtained. The elastic design of the whole structure was performed and the design methods are summarized in the paper. The bearing capacity of column-column seat flange plate connection was designed according to specifications,and the strength and stiffness of the connection were analyzed and tested by finite element analysis and model test. The model test of beam-column joint was performed,and the stiffness changing law was obtained. The method of building simplified analysis model of beam-column joint by spring element for whole structure analysis was proposed. The structural design,numerical simulation and model test results show that the influence of steel stair to stiffness of the whole structure could be ignored,there is no need to build stair model in the whole structure. The seismic performance of this new-type structure system satisfies the requirements of current specifications,and its lateral deformation curve locates between those of frame and shear wall structures. The inclined braces decrease the stress within the connection region,increase the stiffness of the structure,and play a role of reducing the calculation length of column and protecting the column-column seat connection and beam-column connection. The column-column seat flange plate meets strength requirement and behaves as rigid connection,the continuity of strength and stiffness of column is guaranteed.
Aiming at the design of the high-rise prefabricated steel frame with inclined braces,which was applied in the S30 project of Broad Group,the methods of mode-superposition response spectrum and time history analysis were used for the finite element numerical simulation of the whole structure,and the stress and displacement responses under frequent earthquakes were obtained. The elastic design of the whole structure was performed and the design methods are summarized in the paper. The bearing capacity of column-column seat flange plate connection was designed according to specifications,and the strength and stiffness of the connection were analyzed and tested by finite element analysis and model test. The model test of beam-column joint was performed,and the stiffness changing law was obtained. The method of building simplified analysis model of beam-column joint by spring element for whole structure analysis was proposed. The structural design,numerical simulation and model test results show that the influence of steel stair to stiffness of the whole structure could be ignored,there is no need to build stair model in the whole structure. The seismic performance of this new-type structure system satisfies the requirements of current specifications,and its lateral deformation curve locates between those of frame and shear wall structures. The inclined braces decrease the stress within the connection region,increase the stiffness of the structure,and play a role of reducing the calculation length of column and protecting the column-column seat connection and beam-column connection. The column-column seat flange plate meets strength requirement and behaves as rigid connection,the continuity of strength and stiffness of column is guaranteed.
引文
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[13]刘学春,徐阿新,张爱林.模块化装配式斜支撑节点钢框架结构整体稳定性能研究[J].北京工业大学学报,2015,41(5):718-727.(LIU Xuechun,XU Axin,ZHANG Ailin.Research on the integral stability behaviors of modularized prefabricated steel structures with lean-brace joints[J].Journal of Beijing University of Technology,2015,41(5):718-727.(in Chinese))
[14]史晓娜.装配式钢结构斜撑柱的稳定承载力研究[D].北京:北京工业大学,2013:13-16.(SHI Xiaona.Study on the stable bearing capability of the column with diagonal bracing of fabricated steel structure[D].Beijing:Beijing University of Technology,2013:13-16.(in Chinese))
[15]黄欢.装配式带斜撑钢框架极限承载性能研究[D].北京:北京工业大学,2013:26-29.(HUANG Huan.Research on ultimate bearing capacity of assembled steel frame structures with braces[D].Beijing:Beijing University of Technology,2013:26-29.(in Chinese))
[16]Steel Joist Institute.Standard specifications:43rd edition load tables and weight tables for steel joists and joist girders[S].Florence,SC:Steel Joist Institute,2011:11-12.
[17]张爱林,马靖,刘学春,等.装配式斜支撑钢框架承载力性能试验研究[J].工业建筑,2014,22(8):10-13.(ZHANG Ailin,MA Jing,LIU Xuechun,et al.Experiment studies on bearing capacity of prefabricated steel frame with inclined braces[J].Industrial Construction,2014,22(8):10-13.(in Chinese))
[18]石文龙,李国强,叶志明,等.平端板连接半刚性梁柱组合节点的弯矩-转角模型[J].沈阳建筑大学学报(自然科学版),2009,25(3):414-420.(SHI Wenlong,LI Guoqiang,YE Zhiming,et al.Moment rotation models of semi-rigid composite beam to column joints with flush end plate connection[J].Journal of Shenyang Jianzhu University(Natural Science),2009,25(3):414-420.(in Chinese))
[2]张爱林.工业化装配式高层钢结构体系创新、标准规范编制及产业化关键问题[J].工业建筑,2014,44(8):1-6.(ZHANG Ailin.The key issues of system innovation,drawing up standard and industrialization for modularized prefabricated high-rise steel structures[J].Industrial Construction,2014,44(8):1-6.(in Chinese))
[3]Jaillon Lara,Poon C S.The evolution of prefabricated residential building systems in Hong Kong:a review of the public and the private sector[J].Automation in Construction,2009,18(3):239-248.
[4]Dao T N,van de Lindt J W.Seismic performance of an innovative light-frame cold-formed steel frame for midrise construction[J].Journal of Structural Engineering,ASCE,2013,139:837-848.
[5]弓晓芸,严虹.国外工业化钢结构住宅应用探讨[J].工业建筑,2001,31(8):17-19.(GONG Xiaoyun,YAN Hong.Discussion on application of prefabricated houses in foreign countries[J].Industrial Construction,2001,31(8):17-19.(in Chinese))
[6]王伟,陈以一,余亚超,等.分层装配式支撑钢结构工业化建筑体系[J].建筑结构,2012,42(10):48-52.(WANG Wei,CHEN Yiyi,YU Yachao,et al.Floorby-floor assembled steel braced structures for prefabricated buildings[J].Building Structure,2012,42(10):48-52.(in Chinese))
[7]查晓雄,王璐璐,钟善桐.构建多层集装箱改造房的方法及确保其安全性实用公式推导[J].建筑结构,2010,40(6):462-465.(ZHA Xiaoxiong,WANG Lulu,ZHONG Shantong.The method of constructing mutil-storied used shipping container buildings and the deduction of practical formula about structural security[J].Building Structure,2010,40(6):462-465.(in Chinese))
[8]邹晶.我国钢结构住宅体系适用性分析[D].上海:同济大学,2008:4-10.(ZOU Jing.Suitability analysis on application of steel residential building system in China[D].Shanghai:Tongji University,2008:4-10.(in Chinese))
[9]文俊巍.多高层钢结构住宅结构体系分析研究[D].昆明:昆明理工大学,2008:8-10.(WEN Junwei.The analysis of structure system on multi-story and highstory steel structure residence[D].Kunming:Kunming University of Science and Technology,2008:8-10.(in Chinese))
[10]陆烨,李国强.日本一种建设产业化的高层巨型钢结构住宅体系[J].建筑结构,2005,35(6):28-31.(LU Ye,LI Guoqiang.Introduction of a Japanese highrise residential building system with mega steel structure[J].Building Structure,2005,35(6):28-31.(in Chinese))
[11]周绪红,石宇,周天华,等.低层冷弯薄壁型钢结构住宅体系[J].建筑科学与工程学报,2005,22(2):1-14.(ZHOU Xuhong,SHI Yu,ZHOU Tianhua,et al.Cold-formed steel framing system of low-rise residential building[J].Journal of Architecture and Civil Engineering,2005,22(2):1-14.(in Chinese))
[12]刘飞,李元齐,沈祖炎.低层冷弯薄壁型钢龙骨式住宅结构抗震性能研究进展[J].结构工程师,2009,25(4):138-144.(LIU Fei,LI Yuanqi,SHEN Zuyan.Research advances on seismic behavior of low-rise coldformed thin-walled light-gauge steel residential structures[J].Structural Engineers,2009,25(4):138-144.(in Chinese))
[13]刘学春,徐阿新,张爱林.模块化装配式斜支撑节点钢框架结构整体稳定性能研究[J].北京工业大学学报,2015,41(5):718-727.(LIU Xuechun,XU Axin,ZHANG Ailin.Research on the integral stability behaviors of modularized prefabricated steel structures with lean-brace joints[J].Journal of Beijing University of Technology,2015,41(5):718-727.(in Chinese))
[14]史晓娜.装配式钢结构斜撑柱的稳定承载力研究[D].北京:北京工业大学,2013:13-16.(SHI Xiaona.Study on the stable bearing capability of the column with diagonal bracing of fabricated steel structure[D].Beijing:Beijing University of Technology,2013:13-16.(in Chinese))
[15]黄欢.装配式带斜撑钢框架极限承载性能研究[D].北京:北京工业大学,2013:26-29.(HUANG Huan.Research on ultimate bearing capacity of assembled steel frame structures with braces[D].Beijing:Beijing University of Technology,2013:26-29.(in Chinese))
[16]Steel Joist Institute.Standard specifications:43rd edition load tables and weight tables for steel joists and joist girders[S].Florence,SC:Steel Joist Institute,2011:11-12.
[17]张爱林,马靖,刘学春,等.装配式斜支撑钢框架承载力性能试验研究[J].工业建筑,2014,22(8):10-13.(ZHANG Ailin,MA Jing,LIU Xuechun,et al.Experiment studies on bearing capacity of prefabricated steel frame with inclined braces[J].Industrial Construction,2014,22(8):10-13.(in Chinese))
[18]石文龙,李国强,叶志明,等.平端板连接半刚性梁柱组合节点的弯矩-转角模型[J].沈阳建筑大学学报(自然科学版),2009,25(3):414-420.(SHI Wenlong,LI Guoqiang,YE Zhiming,et al.Moment rotation models of semi-rigid composite beam to column joints with flush end plate connection[J].Journal of Shenyang Jianzhu University(Natural Science),2009,25(3):414-420.(in Chinese))