高速公路桥梁随机车流下参数分析与冲击系数的研究

发布时间：2018-04-11 02:01

本文选题：高速公路桥梁 + 车-桥耦合振动　；参考：《长安大学》2014年硕士论文

【摘要】：本文针对高速公路桥梁的随机交通量问题，通过对高速公路桥梁车-桥耦合振动的分析研究，以西宝高速上某桥梁为实例，进行实测调查，对其随机特性进行了详细分析研究，并对随机车流下的各种参数数据统计分析，进而研究出各参数对桥梁冲击系数的影响作用。随着对车-桥耦合振动作用的深入研究与发展的需要，，随机车流各种参数与冲击系数等相关问题还应该进一步的完善。本人总结和借鉴了前人的研究结论和成果,针对高速公路随机车流问题而展开,其主要研究工作包括： 1.对西宝高速上的某桥进行了全天24小时连续的交通流量的实测调查，对车型、车速、车辆行驶横向位置及车重等重要参数进行了采集记录，进而对采集到的样本数据的各车型占有的比例、行驶车道的分布比、车速分布、车重等重要参数进行详尽的统计并分析； 2.本次的随机车流实测调查过程中，采集记录了全天24小时车轮荷载连续作用下，8片梁的动响应极值参数，并对不同车型的动响应影响进行统计分析，找出各车型对各片梁产生的响应极值的统计规律性； 3.在本次随机车流实测调查过程中，通过采集到的各梁体动响应极值的数据，进行统计分析，计算出各车辆过桥引起的冲击系数，并进一步分析研究出车型、车重、车速以及车道等因素对冲击系数的影响关系。通过对以上内容分析研究，最后得出了以下结论：（1）随机车流的各参数分布与实际情况较为符合，比如车道的分配、不同时间段的车速分布等；（2）各片梁的动响应极值间接反映出了车辆在不同车道、不同时间段的行驶情况；（3）车速与冲击系数呈现出了正相关的特性，而车重与冲击系数呈现出了负相关特性。
[Abstract]:Aiming at the problem of random traffic volume of expressway bridge, through the analysis and research of vehicle-bridge coupling vibration of expressway bridge, taking a bridge on Xibao Expressway as an example, the paper carries out a practical survey, and makes a detailed analysis and study on its random characteristics.The influence of each parameter on the impact coefficient of the bridge is studied by statistical analysis of the data of the random vehicle flow.With the need of further research and development of vehicle-bridge coupling vibration, some related problems such as random vehicle flow parameters and impact coefficient should be further improved.This paper summarizes and draws lessons from the previous research conclusions and results, aiming at the problem of freeway random traffic flow. The main research work includes:1.The traffic flow of a bridge on Xibao Expressway was investigated 24 hours a day. The important parameters such as vehicle type, speed, lateral position and vehicle weight were collected and recorded.Then the proportion of each vehicle type, the distribution ratio of driveway, the speed distribution, the vehicle weight and other important parameters of the sample data collected are analyzed and analyzed in detail.2.In the course of the survey of random traffic flow, the dynamic response extreme parameters of 8 beams under the continuous load of 24 hours wheel load were collected and recorded, and the dynamic response of different vehicle models was analyzed statistically.Find out the statistical law of the response extremum of each type to each beam;3.In the course of the survey of the random traffic flow, through the collected data of the extreme value of the dynamic response of each beam body, the impact coefficient caused by each vehicle crossing the bridge is calculated, and the vehicle type and vehicle weight are further analyzed and studied.The influence of speed and driveway on the impact coefficient.Through the analysis and study of the above contents, the following conclusions are drawn: 1) the distribution of the parameters of the random traffic flow is in good agreement with the actual situation, such as the allocation of the driveway.The extreme value of dynamic response of each beam indirectly reflects the vehicle driving conditions in different driveways and different periods of time.The vehicle weight and impact coefficient showed a negative correlation.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.3;U448.14

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