高震区波形钢腹板PC连续刚构桥地震响应分析
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摘要
波形钢腹板PC组合箱梁是一种用波形钢腹板替代普通箱梁的混凝土腹板的新型钢—预应力混凝土组合结构,与普通混凝土箱梁相比,桥梁上部结构自重大约减轻了20%-30%,减少了下部结构工程量。近年来世界各地地震灾害频发,特别是我国2008年发生的四川汶川大地震和今年的雅安大地震都给我们带来了十分惨重的教训,作为生命线工程的桥梁的抗震性能也越发受到人们的重视。工程实践表明,中、大跨径的桥梁采用波形钢腹板PC箱梁结构能够减轻桥梁上部结构的重量,地震激励作用效果显著降低,抗震性能有一定提高。所以,波形钢腹板PC箱梁桥在地震多发区域的应用前景十分广阔。我们有必要对波形钢腹板PC连续刚构桥这类新型桥梁结构进行动力特性和地震响应的研究。
本文的主要内容包括：
(1)本文论述了波形钢腹板PC箱梁桥的发展概况及其特点,介绍了大跨度桥梁抗震分析方法及连续刚构桥抗震设计现状,归纳了桥梁结构地震反应分析方法。
(2)在理论基础上以一座波形钢腹板PC连续刚构桥—大渡河桥为工程背景,利用Midas Civil结构分析软件,研究静力作用下的空间结构行为；进行了动力特性分析；分析了桩—土—结构相互作用对桥梁动力特性的影响,并与普通PC连续刚构桥作对比分析。
(3)对比分析了反应谱法和动态时程分析法对该桥E1地震作用下的地震响应的结果,其中,反应谱法采用规范加速度反应谱作为输入的谱曲线,分别就顺桥向、横桥向、竖向以及三向组合作用分析得到了该桥位移及内力地震响应的一般规律；动态时程分析法则采用El-Centro波、Taft波以及由规范反应谱拟合而成的人工波对大渡河桥进行了时程反应分析,然后相互校核并对比分析了两种方法得出的计算结果,同时对比分析了波形钢腹板PC连续刚构桥与普通PC连续刚构桥的地震响应的差异。
Corrugated steel web PC box girder is a new kind of steel-prestressed concrete composite structure, it use corrugated steel web alternative to the ordinary concrete web. Compared with ordinary concrete box girder bridge, the dead weight of bridge superstructure about reducing from20%to30%, it reducing the quantities of substructure. As the earthquake disaster happened frequently in recent years, especially the WenChuan earthquake of SiChuan which happened in2008and the Yaan earthquake of SiChuan happened in this year bringed disastrous lessons, now the bridge as a lifeline,its seismic capacity has been paid more and more attention. Engineering practice shows that medium-sized span or large span bridge with corrugated steel web PC box girder structure can reduce the weight of the bridge superstructure, so that the seismic excitation effect is significantly reduced and the seismic performance must be improve. So corrugated steel web PC box girder bridges can be widely used in earthquake-prone area. It is nessary to do research on seismic response and seismic performance of such a new bridge structure as corrugated steel web PC continuous rigid frame bridge.
The main content of this paper includes:
1、The development situation and the characteristics of corrugated steel web PC rigid frame bridges is discussed in this paper. Some methods of seismic analysis and continuous continuous rigid frame bridge seismic design on long-span bridge, concluded the method of seismic response analysis is introduced.
2、Based on the theory, With the project background of a corrugated steel web PC continuous steel bridge-Dadu River Bridge, The space structural behavior of static force and dynamic behavior by Midas Civil is researched on in this paper. Then the effect of pile-soil-structure interaction on dynamic behavior is analysised. For comparative analysis with traditional PC continuous rigid frame bridge at the same time.
3、In use of response spectrum method and dynamic response history analysis method, The seismic response in the level of E1is analyzed and compared the results. The response spectrum analysis used the standard acceleration response spectrum as the input spectrum curve, Then the general rule of the bridge displacement and stress seismic response in axial direction, transverse direction, vertical direction and3direction is analysed. The dynamic time history analysis on DaDu River bridge used the seismic waves of El-Centro, Taft and artificial wave fitted by the standard response spectrum, then checked and comparatively analyzed the results of the two methods. Comparatively analyzed seismic performance difference between the corrugated steel web PC continuous steel bridge and the traditional PC continuous steel bridge at the same time.
本文的主要内容包括：
(1)本文论述了波形钢腹板PC箱梁桥的发展概况及其特点,介绍了大跨度桥梁抗震分析方法及连续刚构桥抗震设计现状,归纳了桥梁结构地震反应分析方法。
(2)在理论基础上以一座波形钢腹板PC连续刚构桥—大渡河桥为工程背景,利用Midas Civil结构分析软件,研究静力作用下的空间结构行为；进行了动力特性分析；分析了桩—土—结构相互作用对桥梁动力特性的影响,并与普通PC连续刚构桥作对比分析。
(3)对比分析了反应谱法和动态时程分析法对该桥E1地震作用下的地震响应的结果,其中,反应谱法采用规范加速度反应谱作为输入的谱曲线,分别就顺桥向、横桥向、竖向以及三向组合作用分析得到了该桥位移及内力地震响应的一般规律；动态时程分析法则采用El-Centro波、Taft波以及由规范反应谱拟合而成的人工波对大渡河桥进行了时程反应分析,然后相互校核并对比分析了两种方法得出的计算结果,同时对比分析了波形钢腹板PC连续刚构桥与普通PC连续刚构桥的地震响应的差异。
Corrugated steel web PC box girder is a new kind of steel-prestressed concrete composite structure, it use corrugated steel web alternative to the ordinary concrete web. Compared with ordinary concrete box girder bridge, the dead weight of bridge superstructure about reducing from20%to30%, it reducing the quantities of substructure. As the earthquake disaster happened frequently in recent years, especially the WenChuan earthquake of SiChuan which happened in2008and the Yaan earthquake of SiChuan happened in this year bringed disastrous lessons, now the bridge as a lifeline,its seismic capacity has been paid more and more attention. Engineering practice shows that medium-sized span or large span bridge with corrugated steel web PC box girder structure can reduce the weight of the bridge superstructure, so that the seismic excitation effect is significantly reduced and the seismic performance must be improve. So corrugated steel web PC box girder bridges can be widely used in earthquake-prone area. It is nessary to do research on seismic response and seismic performance of such a new bridge structure as corrugated steel web PC continuous rigid frame bridge.
The main content of this paper includes:
1、The development situation and the characteristics of corrugated steel web PC rigid frame bridges is discussed in this paper. Some methods of seismic analysis and continuous continuous rigid frame bridge seismic design on long-span bridge, concluded the method of seismic response analysis is introduced.
2、Based on the theory, With the project background of a corrugated steel web PC continuous steel bridge-Dadu River Bridge, The space structural behavior of static force and dynamic behavior by Midas Civil is researched on in this paper. Then the effect of pile-soil-structure interaction on dynamic behavior is analysised. For comparative analysis with traditional PC continuous rigid frame bridge at the same time.
3、In use of response spectrum method and dynamic response history analysis method, The seismic response in the level of E1is analyzed and compared the results. The response spectrum analysis used the standard acceleration response spectrum as the input spectrum curve, Then the general rule of the bridge displacement and stress seismic response in axial direction, transverse direction, vertical direction and3direction is analysed. The dynamic time history analysis on DaDu River bridge used the seismic waves of El-Centro, Taft and artificial wave fitted by the standard response spectrum, then checked and comparatively analyzed the results of the two methods. Comparatively analyzed seismic performance difference between the corrugated steel web PC continuous steel bridge and the traditional PC continuous steel bridge at the same time.
引文
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[3]刘玉擎,组合结构桥梁,北京：人民交通出版社,2005
[4]ElgaalyM. Girders with Corrugated webs Under Partial Compressive Edge Loading. American Society of Civil Engineers, Structural Journal,1997 (6):285-299.
[5]Johnson R.P, Cafolla J. Local flange buckling in plate girders with corrugated webs. Proceedings of the Institution of Civil Engineers[J].Structures and Buildings,1997,122 (2):148-156.
[6]常兴文.全比例波形钢腹板PC箱粱力学特性试验研究[J].桥梁建设,(4),2006.
[7]李明元.泼河大桥的施工与动力特性试验研究.交通标准化.2005,(152).
[8]汤意.30米波形钢腹板预应力组合箱梁试验梁模型试验研究.中外公路,2007,(3).
[9]万水,汤意,王劲松.波形钢腹板PC组合箱梁结构特点分析与试验研究[J].南京理工大学学报.28(5)。2004.
[10]万水,蒋正国,孟文节.波形钢腹板PC箱梁桥的结构特点与施工.第十五届全国结构工程学术会议论文集.2006.
[11]吴文清,万水,叶见曙,方太云.波形钢腹板PC组合箱梁剪力滞效应的空间有限元分析[J].土木工程学报.37(9).2004.31-36
[12]刘玉擎.波折腹板组合箱梁桥结构体系分析[J].桥梁建设,(1),2005.
[13]李宏江,叶见署,万水等。波形钢腹板箱梁横隔板间距的研究[J]。公路交通科技,21(10),2004：51-54
[14]徐岳,朱万勇,杨岳.波形钢腹板PC组合箱梁桥抗弯承载力计算[J].长安大学学报,(2),2005.
[15]刘磊,钱冬生.波纹钢腹板预应力结合梁桥[J]国外公路,19(1),1999.
[16]顾安邦,徐君兰.波形钢腹板组合箱梁桥的结构与受力分析[J].重庆交通学院学报.24(2),2005.1-4
[17]胡旭辉,顾安邦,徐君兰.腹板倾角对波形钢腹板箱梁受力性能的影响[J].重庆交通学院学报.25(1),2006.
[18]杨明,孙筠,张树仁,黄侨.波纹钢腹板体外预应力箱梁桥的发展与展望[J].公路交通科技,(12),2006.
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[21]宋建永,任红伟,黄德耕.波折腹板组合梁桥参数化建模与计算模块开发[J].公路交通科技,(3),2006.
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