钢框架-支撑结构二阶侧移的分析方法
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摘要
现阶段钢结构直接分析设计法大多基于承载能力极限状态的全过程直接分析,针对侧移刚度较小的多高层钢结构按此方法设计时,验算其整体柱顶侧移大多超过规范限值的要求。因此,若采用一种基于变形性能的直接分析法,首先对结构二阶侧移预判,再按此荷载水平进行承载力极限状态的验算,可得最终结果与传统计算方法一致,从而简化设计步骤和过程。该文介绍了考虑随机初始几何缺陷数值模拟、拟合公式和神经网络预测3种分析钢框架-支撑结构二阶侧移的方法,3种方法均可得到可靠的预测结果。通过以上方法对结构进行二阶侧移预判后,与规范要求的限值进行比较,选择合理的直接分析设计方法,进行有效简便的结构设计。
Nowadays, direct analysis design method is the whole process of a direct analysis based on the ultimate limit state. When the multi-story steel structures design uses this method, checking its lateral deflections of a column are over standard requirements. Therefore, if it uses the direct analysis design method based on the deformation performance of a structure, you should predict the second-order drift of the structure at first then checking the ultimate limit state. The final result is consistent with the traditional result. Thusly, it can simplify design steps and process. The article introduces three methods of the second-order drift of a brace-steel frame structure, numerical simulation considered random defects, fitting formula and neural network. All of the methods could obtain reliable prediction results. After the second-order lateral shift prediction of a structure by the above method, the reasonable limit analysis design method is selected to compare the limit requirements of the specification, and effective and simple structural design is carried out.
Nowadays, direct analysis design method is the whole process of a direct analysis based on the ultimate limit state. When the multi-story steel structures design uses this method, checking its lateral deflections of a column are over standard requirements. Therefore, if it uses the direct analysis design method based on the deformation performance of a structure, you should predict the second-order drift of the structure at first then checking the ultimate limit state. The final result is consistent with the traditional result. Thusly, it can simplify design steps and process. The article introduces three methods of the second-order drift of a brace-steel frame structure, numerical simulation considered random defects, fitting formula and neural network. All of the methods could obtain reliable prediction results. After the second-order lateral shift prediction of a structure by the above method, the reasonable limit analysis design method is selected to compare the limit requirements of the specification, and effective and simple structural design is carried out.
引文
[1]GB50017―2017,钢结构设计标准[S].北京:中国建筑工业出版社,2017.GB50017―2017,Steel structure design standard[S].Beijing:China Building Industry Press,2017.(in Chinese)
[2]ANSI/AISC360―10,Specification for structural steel buildings[S].American Institute of Steel Construction.2010.
[3]舒赣平,孟宪德,陈绍礼.钢框架的高等分析与设计[J].建筑结构,2005,26(1):51―59.Shu Shuping,Meng Xiande,Chen Shaoli.Advanced analysis and design of steel frames[J].Building Structure,2005,26(1):51―59.(in Chinese)
[4]Chen W F,Kim S E.Advanced Analysis for Steel Design:From Theory to Practice[C].Fourth International Conference on Advances in Steel Structures,2005:61―67.
[5]金路,张壮南,王春刚.基于蒙特卡罗的考虑随机初始缺陷的分析方法[J].工程力学.2012,29(增刊2):93―96.Jin Lu,Zhang Zhuangnan,Wang Chungang.Analysis method of considering random initial defects based on Monte Carlo[J].Engineering Mechanics,2012,29(Supll 2):93―96.(in Chinese)
[6]Jin L,Si H,Jia L G.Study on deformation performances of steel braced frame structures with random imperfections[J].Applied Mechanics and Materials,2014(644/645/646/647/648/649/650):543―546.
[7]熊二刚,梁兴文,张倩.钢结构直接基于位移的抗震设计方法研究[J].地震工程与工程振动,2011,31(4):106―113.Xiong Ergang,Liang Xingwen,Zhang Qian.Study on seismic design method based on displacement directly for steel structures[J].Earthquake Engineering and Engineering Vibration,2011,31(4):106―113.(in Chinese)
[8]吕大刚,贾明明.钢框架结构基于变形可靠度的全概率抗震设计[J].工程力学,2011,28(5):117―123.LüDagang,Jia Mingming.Full probability aseismic design of steel frame structure based on deformation reliability[J].Engineering Mechanics,2011,28(5):117―123.(in Chinese)
[9]金路,刘丹,贾连光.考虑随机缺陷的钢框架-支撑结构试验研究与有限元分析[J].工程力学,2016,33(增刊):79―84.Jin Lu,Liu Dan,Jia Lianguang.Experimental study and finite element analysis on steel braced frame structures considering random imperfections[J].Engineering Mechanics,2016,33(Suppl):79―84.(in Chinese)
[10]Zhao Xin.Study on time-dependent performance based seismic design for tall building structures[J].Earthquake Engineering and Engineering Vibration,2013,33(6):115―121.
[11]刘丹.考虑随机缺陷的钢框架支撑结构高等设计方法研究[D].辽宁:沈阳建筑大学,2015.Liu Dan.Adavanced Design Method Analysis on Steel Braced Frame Stuctures Considering Random Imperfections[D].Liaoning:Shenyang Jianzhu University,2015.(in Chinese)
[12]Xue Qiang.Practical Advanced Design Considering Random Distribution of Initial Geometric Imperfections[J].Advances in Structural Engineering,2011,14(3):387―397.
[13]Jianqing Niu,Hualong Li,Artificial neural Network prediction of mechanical properties of hot rolled low carbon steel strip[J].Engineering Science,2013,11(6):8―12.
[14]韩力群.人工神经网络教程[M].北京:北京邮电大学出版社,2006.Han Liqun.Artificial neural network tutorial[M].Beijing:Beijing University of Posts and Telecommunications Press,2006.(in Chinese)
[2]ANSI/AISC360―10,Specification for structural steel buildings[S].American Institute of Steel Construction.2010.
[3]舒赣平,孟宪德,陈绍礼.钢框架的高等分析与设计[J].建筑结构,2005,26(1):51―59.Shu Shuping,Meng Xiande,Chen Shaoli.Advanced analysis and design of steel frames[J].Building Structure,2005,26(1):51―59.(in Chinese)
[4]Chen W F,Kim S E.Advanced Analysis for Steel Design:From Theory to Practice[C].Fourth International Conference on Advances in Steel Structures,2005:61―67.
[5]金路,张壮南,王春刚.基于蒙特卡罗的考虑随机初始缺陷的分析方法[J].工程力学.2012,29(增刊2):93―96.Jin Lu,Zhang Zhuangnan,Wang Chungang.Analysis method of considering random initial defects based on Monte Carlo[J].Engineering Mechanics,2012,29(Supll 2):93―96.(in Chinese)
[6]Jin L,Si H,Jia L G.Study on deformation performances of steel braced frame structures with random imperfections[J].Applied Mechanics and Materials,2014(644/645/646/647/648/649/650):543―546.
[7]熊二刚,梁兴文,张倩.钢结构直接基于位移的抗震设计方法研究[J].地震工程与工程振动,2011,31(4):106―113.Xiong Ergang,Liang Xingwen,Zhang Qian.Study on seismic design method based on displacement directly for steel structures[J].Earthquake Engineering and Engineering Vibration,2011,31(4):106―113.(in Chinese)
[8]吕大刚,贾明明.钢框架结构基于变形可靠度的全概率抗震设计[J].工程力学,2011,28(5):117―123.LüDagang,Jia Mingming.Full probability aseismic design of steel frame structure based on deformation reliability[J].Engineering Mechanics,2011,28(5):117―123.(in Chinese)
[9]金路,刘丹,贾连光.考虑随机缺陷的钢框架-支撑结构试验研究与有限元分析[J].工程力学,2016,33(增刊):79―84.Jin Lu,Liu Dan,Jia Lianguang.Experimental study and finite element analysis on steel braced frame structures considering random imperfections[J].Engineering Mechanics,2016,33(Suppl):79―84.(in Chinese)
[10]Zhao Xin.Study on time-dependent performance based seismic design for tall building structures[J].Earthquake Engineering and Engineering Vibration,2013,33(6):115―121.
[11]刘丹.考虑随机缺陷的钢框架支撑结构高等设计方法研究[D].辽宁:沈阳建筑大学,2015.Liu Dan.Adavanced Design Method Analysis on Steel Braced Frame Stuctures Considering Random Imperfections[D].Liaoning:Shenyang Jianzhu University,2015.(in Chinese)
[12]Xue Qiang.Practical Advanced Design Considering Random Distribution of Initial Geometric Imperfections[J].Advances in Structural Engineering,2011,14(3):387―397.
[13]Jianqing Niu,Hualong Li,Artificial neural Network prediction of mechanical properties of hot rolled low carbon steel strip[J].Engineering Science,2013,11(6):8―12.
[14]韩力群.人工神经网络教程[M].北京:北京邮电大学出版社,2006.Han Liqun.Artificial neural network tutorial[M].Beijing:Beijing University of Posts and Telecommunications Press,2006.(in Chinese)
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