半整体式桥台无缝化斜交桥的抗震性能分析

发布时间：2018-01-16 01:09

本文关键词：半整体式桥台无缝化斜交桥的抗震性能分析　出处：《建筑科学与工程学报》2017年03期 　论文类型：期刊论文

【摘要】：为了掌握半整体无缝斜交桥的动力特性和地震响应特点,采用MIDAS/Civil建立了湖州贯边桥的有限元模型,进行了动力特性分析,并运用反应谱法和地震时程法对无缝化斜交桥进行了地震响应分析。结果表明:梁端台后土对桥梁的约束作用随斜交角的增大而逐渐减弱;主梁梁端台后土的作用对桥梁结构是有利的,可以有效约束桥梁纵飘;在进行地震安全性分析时,用反应谱法所得的墩底内力和墩顶位移均大于时程分析法;在进行半整体无缝斜交桥的工程设计时,应以垂直于盖梁方向输入地震动计算固定支座所产生的墩顶位移来控制桥梁的抗震安全性;所得研究成果为半整体式桥台无缝化斜交桥的抗震设计和研究提供了可参考资料,对该桥型的实际工程应用和发展起到了推动作用。
[Abstract]:In order to master the dynamic characteristics and seismic response characteristics of semi-integral seamless skew bridge, the finite element model of Huzhou traverse bridge is established by using MIDAS/Civil, and the dynamic characteristics are analyzed. The seismic response of seamless skew bridge is analyzed by using the response spectrum method and seismic time process method. The results show that the restrained action of the earth behind the beam abutment gradually weakens with the increase of the oblique angle. The function of the earth behind the main beam end abutment is advantageous to the bridge structure, and can effectively restrain the bridge longitudinal floating. In seismic safety analysis, the internal force and displacement of pier bottom obtained by response spectrum method are larger than that of time history analysis method. In the engineering design of the semi-integral seamless skew bridge, the seismic safety of the bridge should be controlled by the input of ground motion perpendicular to the cover beam to calculate the displacement of the pier top caused by the fixed support. The research results provide reference for seismic design and research of semi-integral abutment seamless skew bridge, and promote the practical engineering application and development of the bridge.
【作者单位】：福州大学土木工程学院;
【基金】：国家自然科学基金项目(51278126,51578161) 福建省自然科学基金项目(2013J01187)
【分类号】：U442.55
【正文快照】： 0引言随着中国经济的迅猛发展,交通压力日益增大,现有常规桥梁的伸缩缝损坏普遍且严重[1]。无缝桥梁的提出不仅很好地解决了这一问题,还大幅节省了桥梁的建造及维护费用[2]。实际工程中,因地形情况等限制,往往需要将桥台与桥梁纵向设置成一定的角度[3-4]。斜交式半整体桥梁作

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