%0 Journal Article
%T 考虑桥面不平整度退化的简支梁桥冲击系数检测方法研究
%A 刘晨光
%A 王宗林
%A 高庆飞
%J 振动与冲击
%D 2019
%X 针对桥面不平整对桥梁冲击系数的影响机理，不平整度等级与冲击系数之间关系，以及桥梁冲击系数的检测方法等问题，进行了如下研究工作：基于车桥耦合振动理论编制了数值分析程序，计算研究了桥面不平整度的空间域和频域特性对冲击系数的影响方式；基于冲击系数的概率分布模型，给出了特征冲击系数这一新指标，以代表桥梁在不同不平整度等级下、采用不同保证率时冲击系数提高值的大小；最后在有障碍跑车试验法的基础上，给出了模拟不同桥面退化程度的障碍物尺寸与布置方式，提出了一种可预判桥面退化后桥梁冲击系数是否符合要求的新型检测方法，在桥梁动力检测方向上做出了一定的探索。</br>Abstract：Aiming at the effect mechanism of bridge deck unevenness on bridge impact coefficient, the relationship between the unevenness rank and the impact coefficient and the detecting method of the impact coefficient, based on the vehicle-bridge coupled vibration theory, a numerical analysis simulation program was developed, and effect modes of both spatial and frequency domains features of the deck unevenness on the impact coefficient were numerically studied.Based on the probability distribution model of the impact coefficient, a new indicator called the feature impact coefficient was introduced to represent the increase magnitude of the impact coefficient under different unevenness ranks with different guaranteeing rates.Finally, based on the testing method of obstacle sports cars, sizes and layout modes of obstacles to simulate different deck degradation degrees were obtained, and a new detecting method to pre-judge if the bridge impact coefficient meeting the requirements after the degradation of bridge deck was proposed to conduct a certain exploration in bridge dynamic detection.
%K 桥梁动力检测
%K 冲击系数
%K 桥面不平整度
%K 简支梁桥&lt
%K /br&gt
%U http://jvs.sjtu.edu.cn/CN/abstract/abstract8177.shtml