水平力在窄桩台码头排架中分配研究

摘要

针对窄桩台高桩码头排架中水平集中力的横向分力分配系数建立新的简化模型，给出模型求解方法。确定水平集中力的横向分力在窄桩台码头各排架中的分配系数时，排架简化为支撑弹簧，码头上部结构在水平方向不能再被视为刚性连续梁，而应该看作柔性连续梁。提出了排架水平刚性系数和弹性连续梁的求解公式，并编制成电子表格，只需要输入码头尺寸和材料参数等，即可直接得到分配系数。对于窄桩台码头，最不利排架可能不再是端部排架，且规范计算得到的最不利分配系数偏小，可能会存在安全隐患。用电子表格计算分配系数可提高设计精度，确保结构安全可靠。研究结果可以为结构设计和规范修订提供参考。%A new simplified model for the distribution coefficient of horizontal concentrated force in the bents of narrow high-piled platform wharf is built and solved.When determining the distribution coefficient,bents can be simplified as spring supports.The superstructure of the dock can't be simplified as reinforcing beam any more, elastic continuous beam instead. Horizontal rigidity coefficient of frame bent and the formula solving the elastic continuous beam are put forward and compiled into spreadsheet.Parameters such as terminal sizes and material properties are input and distribution coefficients are displayed.For narrow piled platform wharf,the most unfavorable bent may no longer be the head bent, and the most unfavorable distribution coefficient given by specification is smaller than actual value,which is likely to cause an accident.The experimental results show that the spreadsheet can improve design precision,ensure the safety of the structure. The research offers a reference for structure design and standard revision.