摘要
以西南片区某库区的深水高墩大跨波形钢腹板连续刚构桥为工程背景,考虑梁端碰撞作用、动水压力以及二者同时作用的影响,采用OpenSees代码平台进行建模,并分别建立混凝土腹板连续刚构桥模型进行对比分析。分析天然地震动与人工地震动下各个模型的地震响应,对比响应结果以探究梁端碰撞和动水压力对波形钢腹板桥的抗震性能影响。结果表明:动水压力对于桥梁自振特性影响主要在第十阶振型之后,梁端碰撞主要影响桥梁第四阶~七阶振型;动水压力会明显增加桥梁动力响应峰值;梁端碰撞作用会降低桥梁纵桥向位移响应,但会增大墩底弯矩;两者共同作用时会降低桥墩的位移与剪力,但会增加墩底的弯矩。
Taking a deep water high pier and large span corrugated steel web continuous rigid frame bridge in a reservoir area in southwest China as the engineering background,considering the impact action of beam end impact,hydrodynamic pressure and their simultaneous effects,OpenSees program code platform is used to model the bridge,than the corrugated steel web continuous rigid frame bridge and the concrete web continuous rigid frame bridge models were established and analyzed respectively.The seismic responses of each model under natural and artificial ground motions were analyzed and compared to explore the effects of beam end impact and hydrodynamic pressure on the seismic performance of continuous rigid frame bridge with corrugated steel web.The results show that the hydrodynamic pressure has an important influence on the natural vibration characteristics of the bridge mainly after the 1Oth vibration mode and the impact at the ends of the beams mainly affects the 4th to 7th vibration mode of the bridge.The hydrodynamic pressure will obviously increase the peak dynamic response of the bridge.Beam end impact will reduce the longitudinal displacement response of the bridge,but will increase the pier bottom bending moment.When they work together,displacement and shear of pier will be reduced,but bending moment of pier bottom will be increased.
作者
屈俊童
补孟强
王卓
崔茂俊
刘茜
雷真
Qu Jun-tong;Bu Meng-qiang;Wang Zhuo;Cui Mao-jun;Liu Xi;Lei Zhen(School of Architecture and Planning,Yunnan University,Kunming 650504,China)
出处
《工程抗震与加固改造》
北大核心
2024年第2期77-86,共10页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金面上项目(52268038)
云南省应用基础研究计划面上项目(202201AT070159)。
