三峡成库后直立式码头结构作用效应组合研究*

利用有限元分析软件ANSYS对三峡成库后位于长江上游变动回水区河段内一新型架空直立式码头工程进行建模.建立了考虑面板刚度的空间刚架系统的有限元模型,提取了有限元静力分析下各种荷载工况各构件的力学响应值,并利用科学计算软件MATLAB编程对数据进行组合运算,得出构件在荷载工况组合作用下各力学响应量的最不利组合值与对应组合类型.找出作为构件强度验算效应值的最大合成弯矩、最大合成剪力以及最大轴力,并通过比较分析确定出排架范围内几何尺寸相同构件中受力最不利的构件位置.

On loading combinations of high-pile wharf after completion of Three-Gorges reservoir

Using the finite element analysis software ANSYS, we establish a numerical model to simulate a new high-pile wharf in the fluctuating backwater area on the upper reach of the Yangtze River after the impoundment of the Three Gorges reservoir. Mechanical response values of each component under various load cases are extracted based on the static analysis of finite element model considering the plate rigidity of space frame system. The worst case combinations and types of mechanical response values under various load cases are obtained by MATLAB programming. The maximum resultant moment, maximum resultant shear stress and maximum axial force of strength checking effect are achieved to determine the worst stress position of component in the range of frame bent with the same dimension components.