盐雾环境与交变荷载下混凝土梁的试验研究

发布时间：2018-10-09 13:17

【摘要】：为实现对海洋盐雾环境与疲劳交变荷载共同作用的模拟,研制了全国首台海洋环境与动荷载耦合试验设备,该设备包括环境箱和加载装置两部分;运用该设备对9个试件进行9种工况下的耦合试验,主要测定参数包括加载频率及梁的应力水平.结果表明:在加载频率相同的情况下,应力水平越大,同深度下的氯离子含量越大;在应力水平为0.30及0.50的情况下,加载频率越大,扩散系数越大;受拉区的氯离子传输速度较受压区明显.由试验数据拟合与由静载经验公式计算得到的混凝土氯离子扩散系数D值的对比表明,加载频率对构件的氯离子传输存在较大的影响.
[Abstract]:In order to simulate the interaction between marine salt fog environment and fatigue cyclic load, the first marine environment and dynamic load coupling test equipment is developed in China. The equipment includes two parts: environment box and loading device. The coupling tests were carried out on 9 specimens under 9 different working conditions with the equipment. The main parameters were measured including the loading frequency and the stress level of the beam. The results show that the greater the stress level, the greater the chloride content at the same depth, the higher the loading frequency is, the greater the diffusion coefficient is when the stress level is 0.30 and 0.50, respectively. The chloride ion transport velocity in the tension region is more obvious than that in the pressure zone. The comparison between the experimental data fitting and the concrete chloride diffusion coefficient D calculated from the static load empirical formula shows that the loading frequency has a great influence on the chloride ion transport of the members.
【作者单位】：华南理工大学土木与交通学院;中交四航工程研究院有限公司水工构造物耐久性技术交通行业重点实验室;华南理工大学亚热带建筑科学国家重点试验室;
【基金】：交通运输部西部交通建设科技项目(201132849A1140) 华南理工大学亚热带建筑科学国家重点实验室自主研究课题(2013ZC19);华南理工大学中央高校基本科研业务费专项资金资助项目(2015ZM187)~~
【分类号】：TU37

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