地震工程学报2016，Vol.38Issue(2)：166-175,10.DOI:10.3969/j.issn.1000-0844.2016.02.0166
高强钢筋高延性纤维增强混凝土框架结构的屈服机制和抗震性能
Yielding Mechanism and Seismic Performance of Frame Structure with High-strength Bars and High-ductile Fiber-reinforced Concrete
摘要
Abstract
To control the failure mechanism and seismic performance of reinforced concrete (RC) frame structures,our proposed system used ultra-high-strength (UHS)reinforcement in a column and had the option of using fiber-reinforced concrete (FRC)in a frame where damage is expected to occur.Disaster investigations revealed that reinforced concrete frame structures account for a high proportion of buildings destroyed.The use of UHS reinforcement was expected to result in only minimal residual deformations and a low degree of hysteretic energy dissipation.FRC was ex-pected to facilitate hysteretic energy dissipation and increase the system's damage tolerance.Using nonlinear time history analysis,we investigated three frame structures using ABAQUS finite ele-ment software,a large universal finite element software widely used in the nonlinear analysis of RC structures.In particular,we used the concrete-damaged plasticity model,which is one of the most important concrete constitutive models in ABAQUS.Based on our analysis results,we dis-cussed the seismic behavior of structures at different seismic intensities.To determine the seismic capacity of each structure,we selected the following parameters:maximum deformation,story drift,residual deformation,and energy dissipation.We found that the use of UHS reinforcement provided the system with relatively greater resistance against lateral seismic loads and resulted in less residual deformation while preventing the critical column from yielding until the drift reached 3%~4%.Thus,UHS frames should be used in columns designed for astrong column-weak beamfailure mechanism.As the drift increased,differences in residual deformation between spec-imens decreased.These research results suggest that the proposed system may be promising for improving the damage tolerance of structures in seismic regions.关键词
框架结构/纤维增强混凝土/高强钢筋/屈服机制/抗震性能/时程分析Key words
frame structure/fiber-reinforced concrete (FRC)/high-strength bars/yielding mech-anism/seismic performance/time-history analysis分类
建筑与水利引用本文复制引用
陆婷婷,梁兴文..高强钢筋高延性纤维增强混凝土框架结构的屈服机制和抗震性能[J].地震工程学报,2016,38(2):166-175,10.基金项目
国家自然科学基金项目 （）
