摘要
以宁海新桥特大桥主桥为例,采用Midas Civil有限元软件,对其进行了反应谱分析和非线性时程分析。针对其下部结构刚度较大的特点,提出了纵横向限位装置联合抗震支座的抗震设计方案。计算结果表明,E1地震作用下,桥梁基本处于弹性工作状态,E2地震作用下抗震支座非滑动方向发生屈服,通过侧向滑移摩擦消能后,桥墩水平地震力大大减小,而限位装置承担余下的水平地震力,同时防止落梁。纵横向限位装置联合抗震支座的抗震设计,适合本桥,也适合下部结构刚度较大的混凝土梁桥。
Spectrum analysis and time-history analysis for the main bridge of NingHai Bridge is done on the paper. Seismic restrainers and seismic bearings are applied to the main bridge of NingHai bridge for earthquake-resistance. According to the analysis, some conclusions are drawn as follows： first- ly, the bridge works flexibly under earthquake action El; secondly, seismic bearings will yield under earthquake action E2, and the bridge will be hold on by the seismic restrainers while sliding laterally; thirdly, the seismic responses of piers are much more reduced. Finally, seismic design such as seismic restrainers and seismic bearings is effective for the main bridge of NingHai bridge and other bridges with rigid piers.
出处
《公路工程》
北大核心
2013年第2期120-124,136,共6页
Highway Engineering
关键词
宁海新桥
抗震分析
限位装置
抗震支座
NingHai bridge
seismic analysis
seismic restrainers
seismic bearings
