地震作用下动水压力对深水桥墩的影响

英文篇名：Seismic response comparison of hydrodynamic pressure on bridge pier in deep water
中文刊名：交通科技与经济
英文刊名：Technology & Economy in Areas of Communications
作者：孙竞飞 ; 潘亦苏
英文作者：SUN Jing-fei ; PAN Yi-su(School of Mechanics and Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; China)
中文关键词：地震响应 ; 深水桥墩 ; Morison方程 ; Westergarrd方程 ; 流固耦合
英文关键词：seismic response ; pier in deep water ; Morison equation ; Westergarrd equation ; fluid-structure interaction
出版日期：2013-05-05
机构：西南交通大学力学与工程学院;
年：2013
期：03
出版单位：交通科技与经济

摘要

采用Morison方程、Westergarrd方程、流固耦合分析动水压力对桥墩的影响。研究发现:随着水深的增加地震响应会增大;流固耦合理论计算得到的结果小于附加质量法得到的结果;当相对水深较小时,Morison方程计算结果偏于保守,相对水深增大,Westergarrd方程计算结果更加保守,且随着水深增大,响应增大较快;水深对墩底弯矩的影响小于对墩底剪力的影响。
Morison equation,Wetergarrd equation and fluid-structure interaction theory are used to analyze the influence of hydrodynamic pressure on bridge pier and to compare the differences of the three methods in seismic response.Research finds that hydrodynamic pressure reduces the natural frequency of structure while seismic response increases in deeper water,so the results calculated by fluid-structure interaction is less than the result of the added mass method;Morison equation gets the more conservative results at smaller relative depth while Westergarrd equation calculation results are more conservative and while the relative depth increases,response increases faster in deeper water;impaction on bottom shear generated by water depth is greater than the impaction on bottom bending moment.

引文

[1]中华人民共和国铁道部.GB50111-2006(2009年版)铁路工程抗震设计规范[S].北京:中国计划出版社,2006.
    [2]Westergarrd H M.Water pressures on dams duringearthquakes.ASCE.1933,57(9):418-433.
    [3]Morison J R,O&Brien M P,Johnson J W,et al.TheForce Exerted by Surface Wave on Piles[J].PetroleumTransactions,AIME,1950,189:149-154.
    [4]李远林.近海结构水动力学[M].广州:华南理工大学出版社,1999.
    [5]高学奎.地震时作用于深水桥墩上的动水力及对桥墩动力响应的影响[J].北京交通大学学报,2006,30(1):55-58.
    [6]柏晓东,郭安薪,李惠.深水悬臂桥墩动力特性及地震响应分析[J].防灾减灾学报,2011,31(5):506-511.
    [7]李悦,宋波,黄帅.地震时作用于深水桥墩上的动水力及对桥墩动力响应[J].北京科技大学学报,2011,33(3):388-394
    [8]黄信,李忠献.动水压力作用对深水桥墩地震响应的影响[J].土木工程学报,2011,44(1):65-73.
    [9]赖伟,王君杰,胡世德.地震下桥墩动水压力分析[J].同济大学学报,2004,32(1):5
    [10]袁迎春,赖伟,王君杰,等.Morison方程中动水阻力项对桥梁桩柱地震反应的影响[J].世界地震工程,2005,21(4):88-94.