超重车过桥承载能力评估方法研究
发布时间:2018-06-28 14:04
本文选题:超重车 + 检算系数 ; 参考:《河北工业大学》2014年硕士论文
【摘要】:在近十多年来,随着技术的发展,通过对国内工厂石油化工、电力、冶金等工业设备的需求看来,国内制造或者国外引进的设备越来越趋于大型化和重型化。桥梁结构的设计承载能力通常小于超重货物运输的载重,因此为了维护公共安全和防止桥梁损坏,必须在超重货物通过桥梁之前对桥梁进行承载力评估。 对桥梁承载力评估最直接有效的方法是荷载试验法,然而这种方法需要长时间中断交通,影响正常的车辆通行,且需要花费大量的人力物力,代价昂贵。 鉴于以上问题,本文从实用的角度出发,提出了基于检测结果的超重车过桥承载能力评估方法,此方法根据对桥梁结构的材质外观检测结果、测定的结构固有模态参数和调查的荷载分析情况等,引入检算系数Z1、折减系数、恶化系数,并将其反应在结构抗力表达式中,通过结构检算分析,进行荷载效应和抗力效应的比较,对桥梁承载力做出评定。由于超重车通过桥梁的特殊性,车辆行驶不变速、不制动、限速3km/h且靠近桥梁的中心线行驶,,计算荷载效应时不考虑活载修正折减系数。 本文先对评估方法进行理论阐述,然后应用到实际的桥梁评估工作之中,以实践证明了此方法的正确性。
[Abstract]:In the past ten years, with the development of technology, through the demand for petrochemical, electric power, metallurgical and other industrial equipment in domestic factories, the domestic manufacturing or imported equipment is becoming more and more large and heavy. In order to maintain public safety and prevent bridge damage, the bridge bearing capacity must be evaluated before the overweight cargo passes through the bridge. The most direct and effective method to evaluate the bearing capacity of bridges is the load test method. However, this method needs to interrupt the traffic for a long time, which affects the normal traffic of vehicles, and it costs a lot of manpower and material resources. In view of the above problems, this paper puts forward a method for evaluating the bearing capacity of overweight vehicles crossing bridges based on the test results, which is based on the inspection results of the material and appearance of the bridge structures. The natural modal parameters of the structure and the load analysis of the investigation are introduced, the checking coefficient Z1, the reduction coefficient and the deterioration coefficient are introduced, and they are reflected in the structural resistance expression, and analyzed by the structural checking analysis. The load effect and the resistance effect are compared to evaluate the bearing capacity of the bridge. Because of the particularity of the overweight vehicle passing through the bridge, the vehicle does not change speed, do not brake, limit the speed of 3km/h and travel near the center line of the bridge. The load effect is calculated without taking into account the revised reduction coefficient of live load. This paper expounds the evaluation method in theory, then applies it to the practical bridge evaluation work, and proves the correctness of the method in practice.
【学位授予单位】:河北工业大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:U446
【参考文献】
相关期刊论文 前8条
1 胡胜来;郑国华;刁荣亭;;超重车辆运输中桥梁承载能力的评估[J];工程建设与档案;2005年06期
2 官世平;;基于承载能力检算系数的桥梁承载能力评价方法[J];公路交通科技(应用技术版);2010年10期
3 王向阳;季少波;石明强;;中美桥梁设计规范的内力计算比较研究[J];世界桥梁;2007年04期
4 张宇峰;徐文平;杜朝伟;张健飞;;中美公路桥梁承载能力评定方法对比研究[J];现代交通技术;2007年04期
5 李明飞,于玲,李兆明;公路桥梁超限车辆通行安全评价软件的开发[J];沈阳建筑工程学院学报(自然科学版);2002年04期
6 张建仁;王磊;;既有钢筋混凝土桥梁构件承载力估算方法[J];中国公路学报;2006年02期
7 姜海波,车惠民;基于马尔科夫过程的混凝土桥梁状态预测[J];中南公路工程;2002年03期
8 禹智涛,韩大建;既有钢筋混凝土桥梁正常使用极限状态的可靠度分析方法[J];中南公路工程;2003年01期
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