高架渡槽跨下公路行驶车辆动力系统响应的数值分析  

Numerical analysis of the dynamic system response of the vehicles running under the elevated aqueduct

作　　者：钟莉[1] 冷艳杰[1] 马怀发[2,3] ZHONG Li;LENG Yanjie;MA Huaifa(Beijing IWHR Corporation,China Institute of Water Resources and Hydropower Research,Beijing 100048,China;China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Earthquake Engineering Research Centre,China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]中国水利水电科学研究院北京中水科总公司,北京100048 [2]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [3]中国水利水电科学研究院工程抗震研究中心,北京100048

出　　处：《中国水利水电科学研究院学报》2020年第6期439-446,共8页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家重点研发计划项目(2017YFC0404906);国家自然科学基金资助项目(51679265);中国水利水电科学研究院“十三五”重点专项(EB0145B412016)。

摘　　要：本文将渡槽及其跨下公路上高速行驶重型车辆作为动力系统,建立了车辆-路基-渡槽结构系统的动力有限元模型。该模型考虑了跨下高速行驶重型车辆对渡槽的动力作用,采用黏弹性边界作为路基有限域的人工边界,并采用"移动确定荷载法"模拟行驶车辆对路面的作用。首先采用该数值模型模拟在设定现场测试工况下重型车辆以特定速度行进所产生的动力响应,得到了与现场实测数据基本一致的计算结果,从而验证了所提出的计算模型的正确性和有效性。在此基础上,数值模拟了在公路上正常工况和可能发生的极端工况的车辆行驶过程。数值分析显示,渡槽跨下公路上高速行驶重型车辆不会影响其上方渡槽结构的安全。We take an elevated aqueduct and heavy vehicles that are travelling at high speed on the highway under the aqueduct as a dynamical system,and a dynamic finite element model of the vehicle-roadbed-aqueduct structure system is established.The model takes into account the dynamic effects of heavy vehicles traveling at high speeds on the aqueduct.Visco-spring boundaries are used to model artificial boundaries of the finite area of the roadbed,and the"moving determinative load method"is used to simulate the effects of the vehicles on the road.The calculation results are basically consistent with the measured data on site,which verifies the correctness and effectiveness of the proposed calculation model and method.The vehicle driving process under normal and possible extreme conditions on the road is further simulated.The numerical analysis shows that the safety and stability of the aqueduct structure will not be affected by the high-speed driving heavy vehicles on the highway under the aqueduct.

关 键 词：高架渡槽 车辆荷载 动力响应 有限元 

分 类 号：X523[环境科学与工程—环境工程]