钢管混凝土拱桥拱肋横撑对动力和稳定性的影响
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摘要
针对钢管混凝土拱桥拱肋横撑对整体桥梁结构的竖向抗弯刚度和扭转刚度的影响作用,运用通用有限元分析软件ANSYS对某一跨径为400 m的钢管混凝土拱桥建立空间有限元计算模型,分8种工况计算了该桥的动力特性和稳定安全系数,对比分析了横撑的位置、形式及数量等因素对这类型桥梁结构的动力性能和稳定性能的影响。计算结果表明,大跨度钢管混凝土拱桥的拱脚和拱顶必须设置横向联系,拱脚横撑对面内基频的影响不大,对面外基频和结构稳定性影响大,而拱顶横撑对面外基频、面内竖弯基频以及稳定性影响不大,但对扭转基频影响显著,另外,"K"撑对动力和稳定性能的影响比"米"撑显著,建议在不改变横撑数量的情况下优先采用"K"撑。
Considering the influence of that crossbars of arch rib of CFST arch bridge on vertical bending rigidity and torsional rigidity of the whole bridge system,the space finite element calculating model for a CFST arch bridge with span of 400 m was set up by using common software ANSYS.Based on 8 operating mode,the dynamic performance and steady safety factor were calculated,and the effects of location,formation and quantity of crossbars on dynamic and stabilization characteristics were compared and analyzed.The results show that,transverse affiliations must be setup for arch springing and crown of large-span CFST arch bridge;arch springing crossbar have less effects on in-plane basic-frequency than that on out-of-plane basic-frequency and structural stability;arch crown crossbar have less influence on out-of-plane basic-frequency,in-plane vertical basic-frequency and stability than that on torsional basic-frequency.When the quantity of crossbars is hardly changed,it is suggested to use "K" crossbar which has more obvious influence on the dynamic and stabilization characteristics than "米"crossbar has.
Considering the influence of that crossbars of arch rib of CFST arch bridge on vertical bending rigidity and torsional rigidity of the whole bridge system,the space finite element calculating model for a CFST arch bridge with span of 400 m was set up by using common software ANSYS.Based on 8 operating mode,the dynamic performance and steady safety factor were calculated,and the effects of location,formation and quantity of crossbars on dynamic and stabilization characteristics were compared and analyzed.The results show that,transverse affiliations must be setup for arch springing and crown of large-span CFST arch bridge;arch springing crossbar have less effects on in-plane basic-frequency than that on out-of-plane basic-frequency and structural stability;arch crown crossbar have less influence on out-of-plane basic-frequency,in-plane vertical basic-frequency and stability than that on torsional basic-frequency.When the quantity of crossbars is hardly changed,it is suggested to use "K" crossbar which has more obvious influence on the dynamic and stabilization characteristics than "米"crossbar has.
引文
[1]陈宝春.钢管混凝土拱桥设计与施工[M].北京:人民交通出版社,1999.CHEN Bao-chun.Design and Construction of CFST Arch Bridge[M].Beijing:China Communications Press,1999.
[2]彭卫,张新军.大跨径钢管混凝土拱桥的稳定与振动[J].公路,2006(4):120-124.PENG Wei,ZHANG Xin-jun.Stability and Vibration of LongSpan CFST Arch Bridges[J].Highway,2006(4):120-124.
[3]陈水盛,陈宝春.钢管混凝土拱桥动力特性分析[J].公路,2001(2):10-14.CHEN Shui-sheng,CHEN Bao-chun.Analysis of DynamicCharacteristics of Concrete Filled Steel Tubular Arch Bridge[J].Highway,2001(2):10-14.
[4]欧碧峰,赵灿晖,乐建平.大跨度钢管混凝土拱桥的动力特性分析[J].公路交通技术,2005(3):84-87.OU Bi-feng,ZHAO Can-hui,YUE Jian-ping.Analysis of Dy-namic Characteristics of Large Span Concrete-filled Arch Bridg-es[J].Technology of Highway and Transport,2005(3):84-87.
[5]赵跃宇,金波,劳文全.横撑对钢管混凝土拱桥力学性能的影响分析[J].湖南交通科技,2006,32(3):100-102.ZHAO Yue-yu,JIN Bo,LAO Wen-quan.Analysis of Influ-ence of Crossbars on Mechanical Properties of CFST ArchBridge[J].Hunan Communication Science and Technology,2006,32(3):100-102.
[6]黄福云,陈宝春.钢管混凝土拱桥初应力问题[J].公路交通科技,2006,23(11):68-72.HUANG Fu-yun,CHEN Bao-chun.Review of Initial Stress onConcrete Filled Steel Tubular Arch Bridge[J].Journal ofHighway and Transportation Research and Development,2006,23(11):68-72.
[7]陈政清,李玲瑶,李瑜.钢管混凝土拱桥四管与六管拱肋之比较[J].湖南大学学报(自然科学版),2005,32(5):6-10.CHEN Zheng-qing,LI Ling-yao,LI Yu.Comparison of ArchRib between Four-tube CFST Arch Bridge and Six-tube CFSTArch Bridge[J].Journal of Hunan University(Natural Sci-ence Edition),2005,32(5):6-10.
[8]尹浩辉,吴滨生.丫髻沙大桥主拱拱肋钢管混凝土的灌注与线形控制[J].桥梁建设,2000(4):49-51.YIN Hao-hui,WU Bin-sheng.Casting of Concrete in SteelTubes of the Main Arch Bibs and the Control of the Alinementof Yajisha Major Bridge[J].Bridge Construction,2000(4):49-51.
[9]陈宝春,韦建刚.钢管混凝土(单圆管)拱肋刚度对其动力特性的影响[J].地震工程与工程振动,2004,24(3):105-109.CHEN Bao-chun,WEI Jian-gang.Effect of Rigidities of Con-crete Filled Steel Tubular(Single Tube)Arch Rib on Its Dy-namic Characteristics[J].Earthquake Engineering and Engi-neering Vibration,2004,24(3):105-109.
[10]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992.LI Guo-hao.Stability and Vibration of Bridges Structures[M].Beijing:China Railway Publishing House,1992.
[11]陈宝春.钢管混凝土拱桥计算理论研究进展[J].土木工程学报,2003,36(12):47-57.CHEN Bao-chun.State-of-the-art Theory of Calculation for Con-crete-filled Steel Tubular Arch Bridge[J].China Civil Engi-neering Journal,2003,36(12):47-57.
[12]梅青.大跨度上承式钢管混凝土拱桥的稳定性分析与计算[D].南京:东南大学,2000.MEI Qing.Analysis and Calculation of Stability of Deck and LargeSpan CFST Arch Bridge[D].Nanjing:Southeast University,2000.
[13]王宗林,王潮海.大跨径钢管混凝土拱桥的动力性能改造[J].公路交通科技,2006,23(11):73-77.WANG Zong-lin,WANG Chao-hai.Dynamic Performance Im-provement for Steel-tube Confined Concrete Arch Bridge[J].Journal of Highway and Transportation Research and Develop-ment,2006,23(11):73-77.
[2]彭卫,张新军.大跨径钢管混凝土拱桥的稳定与振动[J].公路,2006(4):120-124.PENG Wei,ZHANG Xin-jun.Stability and Vibration of LongSpan CFST Arch Bridges[J].Highway,2006(4):120-124.
[3]陈水盛,陈宝春.钢管混凝土拱桥动力特性分析[J].公路,2001(2):10-14.CHEN Shui-sheng,CHEN Bao-chun.Analysis of DynamicCharacteristics of Concrete Filled Steel Tubular Arch Bridge[J].Highway,2001(2):10-14.
[4]欧碧峰,赵灿晖,乐建平.大跨度钢管混凝土拱桥的动力特性分析[J].公路交通技术,2005(3):84-87.OU Bi-feng,ZHAO Can-hui,YUE Jian-ping.Analysis of Dy-namic Characteristics of Large Span Concrete-filled Arch Bridg-es[J].Technology of Highway and Transport,2005(3):84-87.
[5]赵跃宇,金波,劳文全.横撑对钢管混凝土拱桥力学性能的影响分析[J].湖南交通科技,2006,32(3):100-102.ZHAO Yue-yu,JIN Bo,LAO Wen-quan.Analysis of Influ-ence of Crossbars on Mechanical Properties of CFST ArchBridge[J].Hunan Communication Science and Technology,2006,32(3):100-102.
[6]黄福云,陈宝春.钢管混凝土拱桥初应力问题[J].公路交通科技,2006,23(11):68-72.HUANG Fu-yun,CHEN Bao-chun.Review of Initial Stress onConcrete Filled Steel Tubular Arch Bridge[J].Journal ofHighway and Transportation Research and Development,2006,23(11):68-72.
[7]陈政清,李玲瑶,李瑜.钢管混凝土拱桥四管与六管拱肋之比较[J].湖南大学学报(自然科学版),2005,32(5):6-10.CHEN Zheng-qing,LI Ling-yao,LI Yu.Comparison of ArchRib between Four-tube CFST Arch Bridge and Six-tube CFSTArch Bridge[J].Journal of Hunan University(Natural Sci-ence Edition),2005,32(5):6-10.
[8]尹浩辉,吴滨生.丫髻沙大桥主拱拱肋钢管混凝土的灌注与线形控制[J].桥梁建设,2000(4):49-51.YIN Hao-hui,WU Bin-sheng.Casting of Concrete in SteelTubes of the Main Arch Bibs and the Control of the Alinementof Yajisha Major Bridge[J].Bridge Construction,2000(4):49-51.
[9]陈宝春,韦建刚.钢管混凝土(单圆管)拱肋刚度对其动力特性的影响[J].地震工程与工程振动,2004,24(3):105-109.CHEN Bao-chun,WEI Jian-gang.Effect of Rigidities of Con-crete Filled Steel Tubular(Single Tube)Arch Rib on Its Dy-namic Characteristics[J].Earthquake Engineering and Engi-neering Vibration,2004,24(3):105-109.
[10]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992.LI Guo-hao.Stability and Vibration of Bridges Structures[M].Beijing:China Railway Publishing House,1992.
[11]陈宝春.钢管混凝土拱桥计算理论研究进展[J].土木工程学报,2003,36(12):47-57.CHEN Bao-chun.State-of-the-art Theory of Calculation for Con-crete-filled Steel Tubular Arch Bridge[J].China Civil Engi-neering Journal,2003,36(12):47-57.
[12]梅青.大跨度上承式钢管混凝土拱桥的稳定性分析与计算[D].南京:东南大学,2000.MEI Qing.Analysis and Calculation of Stability of Deck and LargeSpan CFST Arch Bridge[D].Nanjing:Southeast University,2000.
[13]王宗林,王潮海.大跨径钢管混凝土拱桥的动力性能改造[J].公路交通科技,2006,23(11):73-77.WANG Zong-lin,WANG Chao-hai.Dynamic Performance Im-provement for Steel-tube Confined Concrete Arch Bridge[J].Journal of Highway and Transportation Research and Develop-ment,2006,23(11):73-77.
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