纵撑对框架码头水平力分配系数的影响

发布时间：2019-06-13 23:10

【摘要】：针对内河框架码头排架间设置纵撑这一特点,采用ANSYS有限元软件,计算框架码头各工况水平力作用下的分配系数,发现框架码头在水平力作用下呈刚体性质,当作用力在边跨最底层时荷载最集中,可作为桩基受力验算的控制工况。在此基础上,定量分析有无纵撑以及纵撑材料(砼和钢)改变对分配系数的影响,得出设置纵撑能使受力排架分配系数减小15%以上,且混凝土纵撑比钢纵撑的作用提高10%以上。为了减小选用钢纵撑对结构受力的不利影响,本文以钢纵撑厚度和直径为研究对象,进行分配系数的敏感性分析,结果显示增大钢纵撑直径能有效地降低构件的受力集中程度。
[Abstract]:In view of the characteristic of setting longitudinal brace between frames of inland river frame wharf, the distribution coefficient of frame wharf under the action of horizontal force under each working condition is calculated by using ANSYS finite element software. It is found that the frame wharf is rigid body under the action of horizontal force, which can be regarded as the most concentrated load when the force is at the bottom of the edge span, and can be used as the control condition for checking and calculating the force of pile foundation. On this basis, the influence of longitudinal brace and longitudinal brace material (concrete and steel) on distribution coefficient is quantitatively analyzed, and it is concluded that setting longitudinal brace can reduce the distribution coefficient of stress frame by more than 15%, and the effect of concrete longitudinal brace is more than 10% higher than that of steel longitudinal brace. In order to reduce the adverse effect of steel longitudinal brace on the force of structure, the sensitivity analysis of distribution coefficient is carried out by taking the thickness and diameter of steel longitudinal brace as the research object. The results show that increasing the diameter of steel longitudinal brace can effectively reduce the stress concentration of members.
【作者单位】：重庆交通大学国家内河航道整治工程技术研究中心;重庆交通大学水利水运工程教育部重点实验室;
【基金】：“十二五”国家科技支撑计划资助项目(2012BAB05B04) 重庆交通大学研究生教育创新基金资助项目(20130116)
【分类号】：U656.1

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