| 无缝桥抗震性能的对比研究 |
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| 引用本文： | 庄一舟,应滕勇,苏浩,吴可垚,赵志方.无缝桥抗震性能的对比研究[J].世界地震工程,2021,0(3):073-84. |
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| 作者姓名： | 庄一舟 应滕勇 苏浩 吴可垚 赵志方 |
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| 作者单位： | 浙江工业大学 土木工程学院, 浙江 杭州 310023 |
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| 摘 要： | 本文以一座三跨总长60 m的整体桥为案例桥，分别试设计了同跨径的半整体桥、延伸桥面板桥和常规连续梁桥。通过Midas/Civil软件建立四种桥型的有限元模型，并对其进行了E1和E2反应谱分析和时程分析，对比了四种桥型的结构反应峰值（墩顶位移、桥墩及桩基剪力与弯矩、台底位移、桥台桩基剪力与弯矩）。计算结果表明:当桥梁存在15°的斜交角，整体桥、半整体桥在地震动沿平行于桥台长边方向及其垂直方向输入时更不利，而延伸桥面板桥和常规连续梁桥在地震动沿顺桥向和横桥向输入时更不利。四种桥型在地震作用下:整体桥抗震性能最优异，但其台底位移、桥台桩基的剪力和弯矩最大；半整体桥台底位移、桥台桩基的剪力和弯矩最小，其墩顶位移、桥墩及桩基的剪力和弯矩仅比整体桥大；延伸桥面板桥和常规连续梁桥的墩-梁相对位移远大于整体桥和半整体桥，不适用于地震基本烈度高的区域。
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| 关 键 词： | 整体式桥台桥梁 半整体式桥台桥梁 延伸桥面板桥 抗震性能分析 |
Comparative study on seismic performance of main jointless bridges |
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| ZHUANG Yizhou,YING Tengyong,SU Hao,WU Keyao,ZHAO Zhifang.Comparative study on seismic performance of main jointless bridges[J].World Information On Earthquake Engineering,2021,0(3):073-84. |
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| Authors: | ZHUANG Yizhou YING Tengyong SU Hao WU Keyao ZHAO Zhifang |
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| Affiliation: | College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China |
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| Abstract: | In this paper, taking a three-span integral bridge with a total length of 60m as a case bridge, the semi-integral bridge, deck extension bridge and conventional continuous beam bridge with the same span were designed. The finite element models of the four bridges are established with Midas / Civil software. The E1, E2 response spectrum analysis and time history analysis were performed, and the peak structural responses including the displacement of pier top, shear force and moment of pile foundation and pier, displacement of abutment bottom, shear force and moment of the pile foundation under abutment, were compared between the four bridges.The results show that under a skew angle of 15°, the integral bridge and semi-integral bridge are more disadvantageous when the ground motion is input along the direction parallel to the long side of the abutment and its vertical direction, the deck extension bridge and conventional continuous beam bridge are more disadvantageous when the ground motion is input along the bridge’s longitudinal and transverse directions. The seismic performance of these four types of bridges are as follows: the integral bridge has the best seismic performance, but its displacement of abutment bottom, shear force and bending moment of abutment pile foundation are the largest; the semi-integral bridge has the smallest displacement of abutment bottom, and its shear force and bending moment of abutment pile foundation are also the smallest, and its displacement of pier top, shear force and bending moment of pier and pile foundation are only larger than those of the integral bridge; the pier-beam displacement of the deck extension bridge and the conventional continuous beam bridge is much larger than that of the integral bridge and semi-integral bridge, which is not suitable for areas prone to earthquakes. |
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| Keywords: | integral abutment bridge semi-integral abutment bridge deck extension bridge seismic performance analysis |
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