摘要
文中建立了考虑地震作用的地铁列车-高架桥的动力分析模型.以一座三跨四线地铁高架桥为研究对象,利用“承台底等效刚度”法考虑桩-土相互作用,对比分析在地震、列车分别作用及两者共同作用下地铁高架桥的内力、位移和加速度响应,同时对比分析了列车车速对车桥系统振动响应的影响.结果表明:在地震及列车荷载共同作用下,桥梁结构的位移、加速度及内力响应均大于两者单独作用下的结果.桥梁横桥向响应主要受地震荷载影响,而竖桥向地震响应主要受列车荷载影响.车速会对桥梁的地震响应产生较大的影响,桥梁的峰值响应与车速并不是线性关系,在车速为70 km/h时,桥梁的位移、加速度及内力响应达到峰值.
A dynamic analysis model of metro train-viaduct considering earthquake action was established. Taking a three-span four-line metro viaduct as the research object, the pile-soil interaction was considered by the method of “equivalent stiffness at the bottom of the pile cap”, and the internal force, displacement and acceleration responses of the subway viaduct under the action of earthquake, train and both were compared and analyzed, and the influence of train speed on the vibration response of the vehicle-bridge system was also compared and analyzed. The results show that under the combined action of earthquake and train load, the displacement, acceleration and internal force response of bridge structure are greater than those under the separate action of both. The transverse seismic response of the bridge is mainly affected by the seismic load, while the vertical seismic response is mainly affected by the train load. Vehicle speed will have a great influence on the seismic response of the bridge. The peak response of the bridge is not linear with the vehicle speed. When the vehicle speed is 70 km/h, the displacement, acceleration and internal force response of the bridge reach the peak.
作者
武隽
杨铭
董凯
苗通
董志兴
WU Jun;YANG Ming;DONG Kai;MIAO Tong;DONG Zhixing(Highway College,Chang’an University,Xi’an 710064,China;Guangzhou Metro Design Institute Co.Ltd.,Guangzhou 510010,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2023年第1期132-136,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
陕西省自然科学基金面上项目(2020JM-230)
中央高校基本科研业务费专项资金(CHD 300102219220)。
关键词
桥梁工程
列车-桥耦合振动
地震作用
数值模拟
地铁高架桥
列车车速
bridge engineering
train-bridge coupling vibration
seismic excitation
numerical simulation
subway viaduct
train speed
