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Dynamic behavior of damaged concrete bridge structures under moving vehicular loads

机译:车辆荷载作用下受损混凝土桥梁结构的动力特性

摘要

The dynamic behavior of damaged reinforced concrete bridge structures under moving vehicular loads is studied. The vehicle is modeled as a moving mass or by a four degrees-of-freedom system with linear suspensions and tires flexibility, and the bridge is modeled as a continuous Euler-Bernoulli beam simply supported at both ends. The damage may or may not be varying when the load is moving on top, and a damage function representing either the open crack model or the breathing model is used to model the crack zone in the reinforced concrete beam. An experimental test is performed on a reinforced concrete beam with Tee-section subjected to vehicular loadings to check on the performance of the crack models. Effect of other parameters like the moving speed of vehicle and road surface roughness are included in the simulation study, and the dynamic deflection, relative frequency change (RFC), absolute frequency change (AFC) and phase plot of the responses are studied for their possible correlation with the damage modeled as open crack or breathing crack.
机译:研究了在移动车辆荷载下受损钢筋混凝土桥梁结构的动力特性。车辆被建模为运动质量或具有线性悬架和轮胎柔韧性的四自由度系统,桥被建模为连续两端均受支撑的连续Euler-Bernoulli梁。当负载在顶部移动时,损伤可能会或可能不会变化,并且使用表示开放式裂缝模型或呼吸模型的损伤函数对钢筋混凝土梁中的裂缝区域进行建模。在承受车辆载荷的T型截面钢筋混凝土梁上进行了实验测试,以检查裂缝模型的性能。仿真研究还包括其他参数的影响,例如车辆的行驶速度和路面粗糙度,并研究了响应的动态偏差,相对频率变化(RFC),绝对频率变化(AFC)和相位图。与以开裂或呼吸裂纹为模型的损伤之间的相关性。

著录项

  • 作者

    Law SS; Zhu XQ;

  • 作者单位
  • 年度 2004
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

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