悬索桥主缆与索鞍间侧向力分布模式的模型试验研究
发布时间：2018-07-17 22:04
【摘要】：为明确主缆与索鞍间侧向力分布模式并为理论研究提供支撑,需开展针对性试验研究。通过在模型设计、加载方式及测试方法等方面的探索实践,形成了可行的侧向力试验方案。根据测试结果,研究了侧向力的分布模式及变化规律,并验证了理论研究成果的准确性。研究表明:侧向力与索力间基本呈线性变化关系,即在通常范围内增加索力所引起的接触挤压力的增大对鞍槽内离散体间的接触关系及传力机理并无明显影响;侧向力在层间分布差异明显,且不同高度处的侧向力随索力的变化率不同,说明侧向力与径向力间并非Janssen公式所述的固定比值关系;侧向力发展具有单向不可逆性;钢丝排列高宽比越大,其对应高度处的侧向力越小,但沿全高范围内的侧向合力越大;试验结果与理论结果吻合较好,证明所建立的主缆侧向力理论计算方法与公式是准确的。
[Abstract]:In order to clarify the distribution mode of lateral force between main cable and cable saddle and to provide support for theoretical research, it is necessary to carry out targeted experimental research. By exploring the model design, loading method and testing method, a feasible lateral force test scheme is formed. According to the test results, the distribution pattern and variation law of lateral force are studied, and the accuracy of the theoretical research results is verified. The results show that there is a linear relationship between lateral force and cable force, that is, the increase of contact extrusion force caused by increasing cable force in normal range has no obvious effect on the contact relationship and force transfer mechanism between discrete bodies in saddle trough. The distribution of lateral force between layers is obviously different, and the variation rate of lateral force with cable force is different at different heights, which indicates that the relationship between lateral force and radial force is not a fixed ratio as described in Janssen's formula, and the lateral force development has unidirectional irreversibility. The larger the aspect ratio of steel wire arrangement is, the smaller the lateral force is at the corresponding height, but the greater the lateral force is along the whole high range. The experimental results are in good agreement with the theoretical results, which proves that the theoretical calculation method and formula of the lateral force of the main cable are accurate.
【作者单位】： 西南交通大学;浙江省交通规划设计研究院;
【基金】：国家自然科学基金(51178396) 浙江省交通运输厅科技计划(2011H03)
【分类号】：U448.25
本文编号：2131069
[Abstract]:In order to clarify the distribution mode of lateral force between main cable and cable saddle and to provide support for theoretical research, it is necessary to carry out targeted experimental research. By exploring the model design, loading method and testing method, a feasible lateral force test scheme is formed. According to the test results, the distribution pattern and variation law of lateral force are studied, and the accuracy of the theoretical research results is verified. The results show that there is a linear relationship between lateral force and cable force, that is, the increase of contact extrusion force caused by increasing cable force in normal range has no obvious effect on the contact relationship and force transfer mechanism between discrete bodies in saddle trough. The distribution of lateral force between layers is obviously different, and the variation rate of lateral force with cable force is different at different heights, which indicates that the relationship between lateral force and radial force is not a fixed ratio as described in Janssen's formula, and the lateral force development has unidirectional irreversibility. The larger the aspect ratio of steel wire arrangement is, the smaller the lateral force is at the corresponding height, but the greater the lateral force is along the whole high range. The experimental results are in good agreement with the theoretical results, which proves that the theoretical calculation method and formula of the lateral force of the main cable are accurate.
【作者单位】： 西南交通大学;浙江省交通规划设计研究院;
【基金】：国家自然科学基金(51178396) 浙江省交通运输厅科技计划(2011H03)
【分类号】：U448.25
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1 张士铎;单箱梯型梁侧向力近似计算[J];重庆交通学院学报;1988年02期
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