几何缺陷对HP薄壳性能的影响

摘要

针对双曲抛物面(HP)混凝土薄壳结构可能出现的几何缺陷问题,根据假设的几何缺陷函数,采用混凝土弥散开裂模型,通过对存在几何缺陷双曲抛物面薄壳结构性能采用大型通用有限元软件Abaqus进行分析.得出结构中几何缺陷削弱了结构的极限承载力,结构的几何缺陷减小了结构的刚度.%Aiming at possible geometry impedection of hyperbolic paraboloid(HP)twisted shell,fi-nite element is performed based using the Absqus program.Based 011 assumed functions of geometry im-perfection,finite element analysis colleerRing mechanical property of HP shell with geometry imperfection are performed by usiIlg concrete smeared cracking mode.In these analyses,conclusions are drawn thatthe ultimate load of HP 8heu is weakened by geometry impedection,and the stiffness of the structure de-creases.