典型高速公路实际运行车辆荷载模型研究
发布时间：2018-09-12 18:23
【摘要】：汽车活载和疲劳荷载是公路桥梁车辆荷载中最重要的两种荷载。一方面,我国幅员辽阔,各地区发展不平衡导致不同地区间车辆荷载模型存在显著差异；另一方面,既有桥梁实际运行车辆荷载可能和设计荷载有很大差别。因此本研究主要基于动态称重(WIM)系统实测数据进行公路桥梁实际运行汽车活载模型和疲劳荷载模型的研究。主要进行的工作如下：(1)本文以京沪高速新沂河大桥为工程背景,基于1500万辆左右WIM系统实测数据,统计分析各车辆参数的分布特征。继而,运用规范方法建立包括新沂河大桥在内的六种桥型在正常运行状态下的汽车活载模型。(2)同样以新沂河大桥为工程背景,基于平衡更新过程理论计算并道和拥堵运行状态下汽车活载模型。(3)以沿海高速灌河大桥为工程背景,对比分析国内外公路桥梁规范中疲劳荷载模型的模式和取值。在统计分析WIM系统实测数据中车辆参数的基础上,计算实际运行车辆疲劳荷载谱和标准疲劳车,并以灌河大桥斜拉索的疲劳评估为目标,对比分析在所得多种疲劳荷载模型作用下的拉索疲劳作用。得到的主要结论如下：(1)新沂河大桥WIM系统长期监测数据表明,从车辆数来看,夜间重型车较白天多,各季节差异明显,整体数量是平稳中略有增长；从车重上来看,重车比例从外侧车道到内侧车道依次减少,且南行一侧重车明显较北行的多。新沂河大桥右幅实际运行汽车活载模型是公路-I级的1.4倍,左幅为1.22倍。(2)并道运行时,新沂河大桥左幅实际荷载为规范荷载的1.25倍,与正常运行相近；拥堵运行状态下,右幅的荷载达到了公路-I级的2.1倍,左幅为1.8倍,相对于正常运行分别提高了0.7倍和0.6倍。(3)为灌河大桥建立三个车辆疲劳荷载模型：“疲劳荷载模型1”为由5种车型组成的车辆疲劳荷载谱；“疲劳荷载模型2”为一辆由6个轴组成的标准疲劳车；“疲劳荷载模型3”为直接应用实测车辆数据。分别通过荷载模型1和3获得的拉索疲劳作用结果非常相近,同时也都表明灌河大桥拉索具有较高的疲劳可靠性,而且基于疲劳荷载谱的计算结果更加保守。
[Abstract]:Vehicle live load and fatigue load are the two most important loads in highway bridge vehicle load. On the one hand, because of the vast territory of our country, the unbalanced development of different regions leads to significant differences in vehicle load models between different regions; on the other hand, the actual running vehicle loads of existing bridges may differ greatly from the design loads. Therefore, based on the measured data of dynamic weighing (WIM) system, this paper mainly studies the active load model and fatigue load model of highway bridge. The main works are as follows: (1) based on the measured data of about 15 million WIM system, the distribution characteristics of the parameters of each vehicle are statistically analyzed based on the background of Beijing-Shanghai Expressway Xinyi River Bridge. Then, six kinds of bridge models, including Xinyi River Bridge, are established by using the normative method. (2) the Xinyi River Bridge is also used as the engineering background. Based on the theory of equilibrium renewal process, the dynamic load model of vehicles under the condition of parallel road and congested operation is calculated. (3) taking the coastal high-speed Guanhe Bridge as the engineering background, the fatigue load models in the codes of highway bridges at home and abroad are compared and analyzed. Based on the statistical analysis of the vehicle parameters in the measured data of the WIM system, the fatigue load spectrum and the standard fatigue vehicle of the actual running vehicle are calculated, and the fatigue assessment of the stayed cables of the Guanhe Bridge is taken as the objective. The fatigue behavior of cables under various fatigue load models is analyzed. The main conclusions are as follows: (1) the long-term monitoring data of WIM system of Xinyi River Bridge show that, from the view of the number of vehicles, the number of heavy vehicles at night is more than that of the daytime, the difference between seasons is obvious, the overall number of vehicles is slightly increased steadily, and from the point of view of vehicle weight, The proportion of heavy vehicles decreased from the outside lane to the inside lane, and the southbound one focused on the vehicle more than the northbound. The actual running model of the right side of Xinyi River Bridge is 1.4 times that of highway class I and 1.22 times of that of the left. (2) the actual load on the left side of Xinyi River Bridge is 1.25 times of the normal load, which is close to that of normal operation under the condition of congested operation, (2) the actual load on the left side of Xinyi River Bridge is 1.25 times that of the normal load. The load on the right side is 2.1 times that of the highway class I, and on the left is 1.8 times. Compared with normal operation, it increases 0.7 times and 0.6 times respectively. (3) three vehicle fatigue load models are established for Guanhe Bridge: "fatigue load model 1" is composed of five types of vehicle fatigue load spectrum; "fatigue load model 2" is a standard fatigue vehicle composed of six axes, and "fatigue load model 3" is the vehicle data directly applied. The results obtained from load models 1 and 3 are very similar, which also show that the cable of Guanhe Bridge has high fatigue reliability and the calculation results based on fatigue load spectrum are more conservative.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.2
本文编号：2239862
[Abstract]:Vehicle live load and fatigue load are the two most important loads in highway bridge vehicle load. On the one hand, because of the vast territory of our country, the unbalanced development of different regions leads to significant differences in vehicle load models between different regions; on the other hand, the actual running vehicle loads of existing bridges may differ greatly from the design loads. Therefore, based on the measured data of dynamic weighing (WIM) system, this paper mainly studies the active load model and fatigue load model of highway bridge. The main works are as follows: (1) based on the measured data of about 15 million WIM system, the distribution characteristics of the parameters of each vehicle are statistically analyzed based on the background of Beijing-Shanghai Expressway Xinyi River Bridge. Then, six kinds of bridge models, including Xinyi River Bridge, are established by using the normative method. (2) the Xinyi River Bridge is also used as the engineering background. Based on the theory of equilibrium renewal process, the dynamic load model of vehicles under the condition of parallel road and congested operation is calculated. (3) taking the coastal high-speed Guanhe Bridge as the engineering background, the fatigue load models in the codes of highway bridges at home and abroad are compared and analyzed. Based on the statistical analysis of the vehicle parameters in the measured data of the WIM system, the fatigue load spectrum and the standard fatigue vehicle of the actual running vehicle are calculated, and the fatigue assessment of the stayed cables of the Guanhe Bridge is taken as the objective. The fatigue behavior of cables under various fatigue load models is analyzed. The main conclusions are as follows: (1) the long-term monitoring data of WIM system of Xinyi River Bridge show that, from the view of the number of vehicles, the number of heavy vehicles at night is more than that of the daytime, the difference between seasons is obvious, the overall number of vehicles is slightly increased steadily, and from the point of view of vehicle weight, The proportion of heavy vehicles decreased from the outside lane to the inside lane, and the southbound one focused on the vehicle more than the northbound. The actual running model of the right side of Xinyi River Bridge is 1.4 times that of highway class I and 1.22 times of that of the left. (2) the actual load on the left side of Xinyi River Bridge is 1.25 times of the normal load, which is close to that of normal operation under the condition of congested operation, (2) the actual load on the left side of Xinyi River Bridge is 1.25 times that of the normal load. The load on the right side is 2.1 times that of the highway class I, and on the left is 1.8 times. Compared with normal operation, it increases 0.7 times and 0.6 times respectively. (3) three vehicle fatigue load models are established for Guanhe Bridge: "fatigue load model 1" is composed of five types of vehicle fatigue load spectrum; "fatigue load model 2" is a standard fatigue vehicle composed of six axes, and "fatigue load model 3" is the vehicle data directly applied. The results obtained from load models 1 and 3 are very similar, which also show that the cable of Guanhe Bridge has high fatigue reliability and the calculation results based on fatigue load spectrum are more conservative.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.2
【相似文献】
相关期刊论文 前10条
1 李誉;;基于有限元法的隧道荷载模型位移反分析[J];中国民航学院学报;2006年01期
2 王君杰;孟德巍;欧碧峰;;轮船艏部正撞刚性墙面的基本冲击荷载模型[J];振动与冲击;2010年11期
3 卢文良;冯德飞;;城市桥梁拥堵状况下车辆荷载模型及其对桥梁的影响研究[J];科学技术与工程;2007年20期
4 郭琦;田巨峰;尹海军;闫雯;汪洁;;连续刚构桥超高墩的风荷载模型与抗风构造研究[J];西安建筑科技大学学报(自然科学版);2010年05期
5 许肇峰;王强;刘仰韶;;基于WIM的广东省公路桥梁车辆荷载模型研究[J];桥梁建设;2012年06期
6 宗周红;李峰峰;夏叶飞;袁微微;;基于WIM的新沂河大桥车辆荷载模型研究[J];桥梁建设;2013年05期
7 钱国平;白诗尧;;车辆竖向振动荷载模型计算[J];中外公路;2012年03期
8 陈隽;王玲;王浩祺;;单人跳跃荷载模型及其参数取值[J];同济大学学报(自然科学版);2014年06期
9 徐毅峰;;受损钢筋混凝土板桥的可靠性[J];西南公路;1999年02期
10 ;[J];;年期
相关会议论文 前1条
1 戴福忠;周孝贤;;蒙脱卡洛法在荷载组合中的应用[A];全国桥梁结构学术大会论文集（上册）[C];1992年
相关博士学位论文 前1条
1 王强;基于轮轴特征的公路桥梁车辆荷载模型研究[D];福州大学;2010年
相关硕士学位论文 前4条
1 张曦霖;新型元胞自动机交通流荷载模型及其应用[D];长安大学;2015年
2 杨泽刚;典型高速公路实际运行车辆荷载模型研究[D];东南大学;2015年
3 杨军;现役混凝土桥梁剩余承载力评估研究[D];太原理工大学;2009年
4 刘加湾;既有混凝土桥梁可靠性分析[D];浙江大学;2003年
，本文编号：2239862
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2239862.html
