摘要
滚石灾害会直接影响山区桥梁结构使用状况,甚至会导致桥墩偏位、落梁甚至造成整个桥梁发生坍塌。为了能更加真实的模拟滚石撞击桥墩这一动力过程,结合工程实例建立有限元模型,对碰撞动力学分析理论以及数值分析原理进行了介绍。运用LS-DYNA对不同滚石质量、不同滚石速度撞击桥墩时结构动力响应进行参数化分析,研究表明:滚石质量越大、速度越大对桥墩损伤产生的影响越显著。
The rolling stone disaster will directly affect the use of the bridge structure in the mountainous area,and even lead to the deviation of the bridge pier,the falling beam and even the collapse of the entire bridge. In order to simulate the dynamic process of rock-rock impact piers more realistically,this paper combines engineering examples to establish a finite element model,and introduces the theory of collision dynamics analysis and the principle of numerical analysis. The LS-DYNA is used to analyze the structural dynamic response of different rolling stone quality and different rolling stone speeds. The research shows that the greater the mass of the rolling stone and the higher the speed,the more significant the impact on the pier damage.
作者
郭森
张柳煜
郭元凯
武芳文
孟园英
张桂通
GUO Sen;ZHANG Liuyu;GUO Yuankai;WU Fangwen;MENG Yuanying;ZHANG Guitong(Chang’an University,Xi’an 710064,Shaanxi,China)
出处
《河北工程大学学报（自然科学版）》
CAS
2019年第1期17-21,112,共6页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(51408040)
陕西省自然科学基金资助项目项目(2017JM5110)
关键词
桥梁
滚石撞击
滚石质量
滚石速度
动力响应
bridge
rolling stone impact
rolling stone quality
rolling stone speed
dynamic response
