Dynamic Coupling Analysis of a Simply Supported Beam under Two Moving Loads
石红迁 SHI Hong-qian
（广东盛翔交通工程检测有限公司，广州 511400）
（Guangdong Shengxiang Traffic Engineering Inspection Co.，Ltd.，Guangzhou 511400，China）
摘要： 交通运输行业的飞速发展伴随着车辆速度的提升与车流密度增大，车辆与桥梁之间的动力耦合研究显得越来越重要。变截面桥梁因其受力合理、节省材料等优势应用更为广泛。本文建立了两个同向移动常荷载作用下的简支变截面梁模型。通过模态叠加法，给出了问题的理论解；并对影响变截面桥梁动力响应的非均匀系数和荷载移动速度进行了深入的研究分析。其结果对相关结构设计具有一定的理论意义与实践价值。
Abstract: The continuous development of transportation system brings faster vehicle speed and greater traffic density, and the research on the dynamic coupling between vehicles and bridges is becoming more and more important. The variable-section beam is more widely used because of its advantages of reasonable force and material saving. In this paper, a simply supported and variable cross-section beam model under the action of two moving constant loads in the same direction is established. The theoretical solution of the problem is firstly given by the modal superposition method. Furthermore, the non-uniformity Coefficient and the load moving speed which affect the dynamic response of the bridge with variable cross-section are deeply studied and analyzed. The present results can provide the significant theoretical guidance and practical value for the related structural design.
关键词： 车-桥耦合；变截面桥梁；动荷载；动力响应
Key words: vehicle-bridgecoupling；variablecross-sectionbridge；dynamicload；dynamic response
中图分类号：U441+.3 文献标识码：A 文章编号：1006-4311（2022）23-151-03
DOI:10.3969/j.issn.1006-4311.2022.23.049.
文章出处：石红迁. 两个移动荷载作用下简支梁的动力耦合分析[J]. 价值工程,2022,41(23):151-153. |
