摘要
以安徽省梅山南路桥为工程实例,采用软件MIDAS/Civil 2012进行建模分析,计算其自振特性和地震响应,运用反应谱法和时程法分析三向地震同时作用于桥梁时产生的影响,对比2种方法所得结果。分析表明,斜靠式拱桥在地震作用下动力效应显著,振型集中,阶次越高,振型越复杂;三向地震输入时,拱脚部位的内力最大,应加强其构造。采用2种计算方法所得地震响应基本一致,差别很小。
Taking Mei-Shan South Bridge in Anhui as the research project,the finite element model of the bridge was established by using software MIDAS/Civil 2012.The natural vibration characteristics and seismic response of seismic wave input in three directions were calculated by the response spectrum analysis and time history analysis.The results show that the dynamic response on earthquake is obvious and the vibration shapes are centralized,the high order vibration shapes are more complex;the internal forces of arch feet are maximum under the action of three directions waves input,which should be strengthened;the larger the vice arch inclination angle,the stronger the lateral stability,the weaker the vertical stability.There is a little difference between the results calculated by the two methods.
出处
《交通科技》
2017年第1期44-46,59,共4页
Transportation Science & Technology
关键词
斜靠式拱桥
自振特性
地震响应
反应谱分析
时程分析
leaning arch bridge
natural vibration characteristics
seismic response
response spectrum analysis
time-history analysis
