摘要
针对公路连续刚构桥梁的车桥耦合共振判定问题,首先提出基于ANSYS的车桥耦合振动响应数值分析方法,进而对车桥耦合振动的特殊情况下,车桥耦合共振效应进行研究。以单车辆及多车辆行驶时的公路连续刚构桥梁为背景,分别给出车桥耦合共振效应的判定方法及相关公式,并给出不同行驶工况下的判定算例。研究结果表明:连续刚构桥梁存在与单车辆或等间距车流发生车桥耦合共振响应的可能性,需运用所提出的公式进行判定;共振发生时,桥墩截面处荷载效应值成倍增长,主梁截面处荷载效应增量不明显;建议在连续刚构桥各车道纵向不同位置设置减速标志,以"打乱"车流,减小共振概率。
A numerical analysis method based on ANSYS was presented to judge the coupled vibration resonance of vehicle-bridge of continuous rigid frame bridges. Based on the method, one special condition of vehicle-bridge coupled vibration and resonance effect was carried out. Finally, the criterion and the relative formulas of the resonance effect was presented through the models of continuous rigid frame bridge in both single and multiple vehicles driving conditions.The results show that for the continuous rigid frame bridges there exist the possibility that the coupled vibration resonance of vehicle-bridge would occur with the single vehicle and evenly spaced traffic flow, which can be judged by the equation presented in this paper. The load effect number of bridge pier has rapid growth, while the beam section is approximately the same when the resonance occurs. Therefore, setting up the traffic sign of deceleration in different longitudinal positions can reduce the possibility of the resonance.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第11期4050-4058,共9页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51008028)
中央高校基本科研业务专项基金资助项目(CHD2011JC155)~~
关键词
桥梁工程
车桥耦合振动
连续刚构桥梁
车桥耦合共振
冲击系数
bridge engineering
coupled vibration of vehicle-bridge
continuous rigid frame bridge
coupled vibration resonance of vehicle-bridge
impact effect
作者简介
王凌波（1984-），女，陕西西安人，博士，讲师，从事桥梁安全评价及动力性能研究：电话：13772159869；E-mail：dr．wlb@qq．com
