配筋工程水泥基复合材料复合受扭柱抗震性能研究和损伤分析
Research on Seismic Performance and Damage Analysis of Reinforced ECC Composite Torsional Columns
洪宇 1邵永健 1祁明涛1
作者信息
- 1. 苏州科技大学土木工程学院,江苏苏州 215011
- 折叠
摘要
为研究配筋工程水泥基复合材料(Engineered Cementitious Composite,ECC)柱在压弯剪扭复合受力状态下的抗震性能,对11根配筋ECC试件和1根钢筋混凝土(Reinforcement Concrete,RC)试件进行拟静力试验,探究轴压比、扭弯比、剪跨比、纵筋配筋率、配箍率、纤维含量、原材料等参数对抗震性能和损伤指数的影响.结果表明:相较于RC柱,ECC柱的抗变形能力更强,复合受扭承载力和抗震性能也有显著提升;达到极限位移后ECC柱的扭矩下降平缓,其损伤进程也较为缓慢;对于ECC试件,适当提高轴压比、扭弯比、剪跨比和纤维含量能够有效抑制地震作用下构件的损伤;配箍率对于ECC柱的复合受扭承载力影响不大,但配置箍筋是必要的.
Abstract
To study the seismic performance of reinforced Engineered Cementitious Composite(ECC)columns under the combination of compression,bending,shear and torsion,quasi-static tests were con-ducted on 11 reinforced ECC specimens and 1 reinforcement concrete(RC)specimen to investigate the effects of axial compression ratio,torsion bending ratio,shear-span ratio,longitudinal reinforcement rati-o,stirrup ratio,fiber content,raw materials and other factors on seismic performance and damage de-gree.The research results indicated that compared to traditional reinforced concrete,ECC specimens showed better deformation resistance and significant improvements in seismic performance and composite torsional bearing capacity;after reaching the ultimate displacement,the torque of the ECC specimen de-creased smoothly,and the damage process was also relatively slow;for ECC specimens,increasing the axial compression ratio,torsion-bending ratio,shear-span ratio,and fiber content appropriately could ef-fectively suppress the damage of components under seismic action;the reinforcement ratio had little effect on the composite torsional bearing capacity of ECC specimens,but it was necessary to configure stirrups.
关键词
配筋ECC柱/拟静力加载/复合受扭/抗震性能/Park-Ang法/累积损伤指数Key words
reinforced ECC columns/quasi-static loading/composite torsion/seismic performance/Park-Ang method/cumulative damage index引用本文复制引用
基金项目
江苏省研究生实践创新计划(2023)(SJCX23_1727)
出版年
2024
NETL
NSTL
万方数据