摘要
以考虑两侧引桥与路基的高速铁路CRTSⅡ型板式无砟轨道-连续梁桥系统(HBBSS)为例,研究轨道系统中各关键构件的地震响应规律及参数影响分析,基于有限元方法建立HBBSS地震分析模型,分析HBBSS中各关键构件的地震响应规律以及刚度变化对HBBSS地震响应的影响分析。结果表明:HBBSS中各关键构件的地震损伤顺序依次为滑动层、CA砂浆和剪切钢筋;剪力齿槽和扣件在设计标准规定的设防烈度下难以损伤;CA砂浆、滑动层及剪切钢筋是HBBSS地震响应的重要影响因素,在抗震设计中应加以关注。
In order to study the seismic response laws and analyze the parameter impact of each key component of CRTSⅡslab ballastless track-continuous girder bridge for high-speed railway including the approach bridge and subgrade(HBBSS),the HBBSS simulation model is established based on finite element method.And the seismic response law of each key component in HBBSS and the influence of stiffness variation on the HBBSS seismic response are analyzed.The results indicate that the seismic damage sequence of each key component in HBBSS is sliding layer,CA mortar and shear steel bars.Shear alveolar and fasteners are hardly to be damaged under the fortification intensity specified in the design standard.CA mortar,sliding layer and shear steels are important influencing factors of HBBSS seismic response and should be stressed in seismic design.
作者
冯玉林
蒋丽忠
周旺保
何彬彬
聂磊鑫
谭志化
FENG Yulin;JIANG Lizhong;ZHOU Wangbao;HE Binbin;NIE Leixin;TAN Zhihua(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Laboratory for High Speed Railway Construction,Central South University,Changsha 410075,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;University of Chinese Academy of sciences,Beijing 100049,China)
出处
《铁道标准设计》
北大核心
2020年第10期30-34,共5页
Railway Standard Design
基金
国家自然科学基金项目(U1934207,51778630)
中央高校基本科研业务费专项资金资助项目(2018zzts189)。
关键词
高速铁路
无砟轨道
连续梁桥
地震响应
关键构件
high-speed railway
ballastless track
continuous girder bridge
seismic response
key components
