钢管混凝土系杆拱桥静力参数敏感性分析
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摘要
为了研究设计参数对某钢管混凝土系杆拱桥结构响应的影响,对常用3种参数敏感性分析方法进行对比。并在ANSYS有限元模型中选用响应面法(RSM)对钢管混凝土系杆拱桥进行静力参数敏感性分析,求得各设计参数对拱顶位移、拱座水平推力及拱圈内力等结构响应的敏感因子与敏感百分比。研究结果表明:敏感因子能够体现结构响应随着设计参数变化的程度及规律,而根据敏感百分比的大小能更直观地判断出各设计参数对结构响应的重要程度。为钢管混凝土系杆拱桥的参数敏感性分析与参数识别提供参考。
To study the influence degree of design various parameters on the structural response of concrete-filled steel tubular tied arch bridge,three common parameter sensitivity analysis methods was compared.In a finite element model established by ANSYS,response surface method(RSM) was used to carry out parameter sensitivity analysis on this bridge,and obtained sensitive factor and sensitive percentage of various design parameters on some structure responses,such as deflection in the top of main arch,horizontal force of arch abutment,moment and axial force in the top of main arch.The results show:sensitive factor of design parameters can reflect the degree and regularities of the structural response changing with design parameters,while according to the size of the sensitive percentage could quantitatively distinguish the importance of various design parameters on the structural response.The method can offer some reference to the parameter sensitivity analysis and parameter identification of concrete-filled steel tubular tied arch bridge.
To study the influence degree of design various parameters on the structural response of concrete-filled steel tubular tied arch bridge,three common parameter sensitivity analysis methods was compared.In a finite element model established by ANSYS,response surface method(RSM) was used to carry out parameter sensitivity analysis on this bridge,and obtained sensitive factor and sensitive percentage of various design parameters on some structure responses,such as deflection in the top of main arch,horizontal force of arch abutment,moment and axial force in the top of main arch.The results show:sensitive factor of design parameters can reflect the degree and regularities of the structural response changing with design parameters,while according to the size of the sensitive percentage could quantitatively distinguish the importance of various design parameters on the structural response.The method can offer some reference to the parameter sensitivity analysis and parameter identification of concrete-filled steel tubular tied arch bridge.
引文
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[2]王学伟,卜一之,祝兵,等.六塔斜拉桥主梁制造阶段参数敏感性研究[J].公路交通科技,2015,32(1):76-82.WANG Xuewei,BU Yizhi,ZHU Bing,et al.Analysis on parameter sensitivity at manufacturing stage of main beam of 6-pylon cable-stayed bridge[J].Journal of Highway and Transportation Research and Development,2015,32(1):76-82.
[3]郭鹏.中承式钢管混凝土系杆拱桥施工控制及参数敏感性分析[D].合肥:合肥工业大学,2016.GUO Peng.Construction control and parameter sensitivity analysis of half-through concrete-filled steel tubular tied arch bridge[D].Hefei:Hefei University of Technology,2016.
[4]周越.下承式钢管混凝土桁架拱桥模态参数敏感分析[D].郑州:郑州大学,2013.ZHOU Yue.The sensitivity analysis of a bottom-through concrete-filled steel tube truss arch bridge's modal parameter[D].Zhengzhou:Zhengzhou University,2013.
[5]刘世明,刘永健.无背索曲塔曲梁斜拉桥参数敏感性分析[J].公路交通科技,2014,31(2):54-59.LIU Shiming,LIU Yongjian.Analysis of parameter sensitivity for curved-pylon and curved-girder cablestayed bridge without back-stay[J].Journal of Highway and Transportation Research and Development,2014,31(2):54-59.
[6]谢明志,卜一之,张克跃,等.特大跨度混合梁斜拉桥几何控制法参数敏感性[J].长安大学学报(自然科学版),2014,34(3):66-73.XIE Mingzhi,BU Yizhi,ZHANG Keyue,et al.Sensitivity of parameters of super long-span hybrid girder cable-stayed bridge based on geometry control method[J].Journal of Chang'an University(Natural Science Edition),2014,34(3):66-73.
[7]刘沐宇,孙向东,涂开智,等.四塔单索面矮塔斜拉桥结构参数敏感性分析[J].华中科技大学学报(城市科学版),2009,26(4):10-14.LIU Muyu,SUN Xiangdong,TU Kaizhi,et al.Sensitivity analysis for the structural design parameters of four-tower extradosed cable-stayed bridge with single plane[J].Journal of HUST(Urban Science Edition),2009,26(4):10-14.
[8]刘旭政,黄平明,许汉铮.独塔斜拉桥参数敏感性分析[J].长安大学学报(自然科学版),2007,35(6):63-66.LIU Xuzheng,HUANG Pingming,XU Hanzheng.Analysis of parameters'sensitiveness of cable-stayed bridges with single tower[J].Journal of Chang'an University(Natural Science Edition),2007,35(6):63-66.
[9]张治成.大跨度钢管混凝土拱桥施工控制研究[D].杭州:浙江大学,2006.ZHANG Zhicheng.Construction control of CFST arch bridge with long span[D].Hangzhou:Zhejiang University,2006.
[10]刘剑,王达.基于响应面法的大跨径斜拉桥静力参数敏感性分析[J].公路交通科技,2015,32(8):100-106.LIU Jian,WANG Da.Static parameter sensitivity analysis of long-span cable-stayed bridge based on RSM[J].Journal of Highway and Transportation Research and Development,2015,32(8):100-106.
[11]WEI Chunming,CHEN Huai,WANG Yan.Parameters'sensitivity analysis of extradosed cable-stayed bridge[J].Journal of Zhengzhou University(Natural Science),2007,39(3):178-182.
[12]WANG F S.Uncertainties in dynamic soil-structure interaction[J].Journal of Engineering Mechanics,1984,110(2):308-324.
[13]WANG F S.Slope reliability and response surface method[J].Journal of Geotechnical Engineering Mechanics,1985,111(1):32-53.
[14]Bucher C G,Bourgund U A.Fast and efficient response surface approach for structural reliability problems[J].Structural Safety,1990,7(1):57-66.