基于轮式滚动加载的正交异性钢桥面板疲劳试验设计

发布时间：2018-02-03 17:47

本文关键词： 桥梁工程轮式滚动加载疲劳试验正交异性钢桥面板疲劳强度　出处：《公路交通科技》2017年08期 　论文类型：期刊论文

【摘要】：能模拟车辆荷载通过效应的疲劳模型试验是研究正交异性钢桥面板疲劳性能的有效手段。利用国内首台自主研发的桥面结构专用轮式滚动疲劳加载装置,以广东虎门二桥坭洲水道桥为依托工程,研究了基于轮式滚动加载的正交异性钢桥面板疲劳试验设计问题。首先,根据实桥交通需求分析,合理确定实桥疲劳荷载谱;其次,计算疲劳敏感部位热点在疲劳荷载谱各车型作用下的应力历程,采用雨流计数法计算应力谱,根据Miner疲劳损伤累积理论转化为每种车型通过1次的等效应力幅,结合交通量预测计算实桥各构造细节在设计寿命期内的疲劳累积损伤;最后,根据设备性能参数,分别计算橡胶轮双轴加载和钢轮单轴加载下试验模型各细节的等效应力幅,通过与实桥钢桥面板各细节的疲劳累计损伤等效,从而确定试验加载轴类型、加载水平以及对应各细节的等效作用次数。研究成果对改进正交异性钢桥面板疲劳试验设计有重要参考意义。
[Abstract]:Can simulate the vehicle load fatigue model test is an effective method to study the effect of fatigue properties of orthotropic steel deck. Using special wheeled domestic first self-developed deck rolling fatigue loading device in Guangdong Humen bridge nizhou Waterway Bridge project, the experimental design of orthotropic steel deck fatigue loading rolling wheel based on the analysis of the real bridge. Firstly, according to the traffic demand, reasonably determine the fatigue load spectrum of bridge; secondly, the calculation of fatigue sensitive parts of the hot spot in the fatigue load spectrum of the various models under the effect of stress history, stress calculation of spectrum using rain flow counting method, according to Miner's theory of fatigue damage accumulation into each model through the equivalent of 1 times the stress amplitude, prediction and calculation of bridge each structural detail fatigue during the design life of the cumulative damage combined with the traffic volume; finally, according to the performance parameters of the equipment, respectively The details of the equivalent test model of the rubber wheel and the steel wheel biaxial loading under uniaxial loading stress amplitude, the fatigue of orthotropic steel bridge deck and the details of the cumulative damage equivalent, so as to determine the loading axis type, number of loading level and equivalent function corresponding to each detail. Research results of the improved experimental design has important reference significance the orthotropic steel deck fatigue.

【作者单位】：中交公路规划设计院有限公司;中交公路长大桥建设国家工程研究中心有限公司;
【基金】：交通运输部建设科技项目(2015 318 J41 270)
【分类号】：U441.4
【正文快照】： 投稿日期:2016-06-20design of orthotropic steel decks.0引言自20世纪50年代问世以来,正交异性钢桥面板(下面简称“钢桥面板”)凭借重量轻、承载能力强、施工速度快的优势,成为国内外大中跨度钢桥广泛采用的桥面结构形式。然而由于钢桥面板直接承受车辆轮荷载的反复作用,且

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