建筑结构非线性动力分析的有限元模型

Practical beam and wall elements for nonlinear analysis of structures

介绍具有材料非线性的梁单元和剪力墙单元.单元刚度集成采用了8点高斯积分,既保证了精度又保证了计算效率.梁截面力学特性的计算中采用高斯点积分替代通常的非线性单元集成的纤维束集合,适当减少了计算次数.在线性壳单元的模式下结合剪力墙的构造和受力特点建立起一种非线性墙单元.墙单元的每个高斯点近似考虑了双向应力作用,以满足混凝土在双向应力作用下的强度变化.

The beam and wall elements with non-linear material properties are introduced. The 8 points Guss integration was used to form the element stillness, which meets the needs of accuracy and the calculation efficiency. Instead of the fiber method, Guss integration was adopted so that the calculation frequency was reduced.