摘要
以含钢率、长细比、材料强度等为主要参数,在确定钢材和核心混凝土在循环荷载作用下的应力-应变关系模型的基础上,利用有限元软件ANSYS,对方钢管混凝土柱在循环荷载作用下全过程进行了计算,以模拟地震作用下方钢管混凝土柱的实际受力性能。研究表明:方钢管混凝土柱荷载-位移滞回曲线呈比较饱满的"梭形",没有明显的捏缩现象,达到极限荷载后,仍表现出良好的延性和后期变形能力,能够满足实际工程中大跨度、重荷载的要求,是一种良好的结构形式。
Considering the steel ratio, slenderness ratio, and the material strength as the main variable parameters, based on the determination of the cyclic loading, use the finite element steel tubular columns under cyclic loading the stress-strain relation of the steel and core concrete under software ANSYS to calculate the concrete-filled rectangular in the whole process, which simulates the mechanical properties of concrete-filled rectangular steel tubular columns in actual earthquake. Research shows that： the load versus displacement hysteretic curves of concrete-filled rectangular steel tubular columns was relatively full ＂spindle＂, without obvious pinch phenomenon. After the limit load, model structure still showed good ductility and post-deformation. The concrete-filled rectangular steel tubular columns can meet the requirements of the real projects with large span and heavy load.
出处
《西安科技大学学报》
CAS
2012年第1期76-80,共5页
Journal of Xi’an University of Science and Technology
关键词
钢管混凝土
有限元
荷载-位移滞回曲线
刚度
concrete-filled steel tubular
finite element
load versus displacement hysteretic curves
rigidity degeneration
