建筑结构学报2017，Vol.38Issue(9)：54-61,8.DOI:10.14006/j.jzjgxb.2017.09.007
钢筋混凝土框架梁柱节点灌浆套筒连接抗震性能研究
Study of seismic performance of reinforced concrete frame beam-column joints connected with grouted sleeves
摘要
Abstract
Four scaled specimens of RC frame beam column interior joints (two cast-in-place beam-column joints and two assembled monolithic beam-column joints) were designed.The specimens were tested under low-cycle repeated loading under different axial compression ratios (0.3 and 0.4).The important evaluation indexes of failure modes,hysteretic characteristics,stiffness degradation,energy dissipation capacity and splicing strain variation of grouted sleeves were studied.The results show that the energy dissipation capacity of assembled monolithic joints is slightly lower than those of cast-in-place joints,and the crack distribution and failure modes are different obviously.The cracks distribution of assembled monolithic joints is centralized.The mainly regions of cracks are beam-column interfaces,grouted sleeve regions and middle cross sections of beam,but the cracks distribution of cast-in-place joints are uniform.The effect of axial compression ratio on hysteretic characteristics is not obvious in prime period of loading,but the effects of axial compression ratio on slippage of reinforcing bar and shear deformation are obvious in the later loading stage.Based on the experimental results,a simplified method of material equivalent treatment is proposed and different regions of specimen can adopt different section properties.There is a good agreement between the analytical results by OpenSees and the experimental results.关键词
预制装配梁柱节点/灌浆套筒连接/轴压比/低周循环加载试验/数值模拟/抗震性能Key words
assembled monolithic beam-column joint/grout-filled coupler/axial compression ratio/low-cycle repeated loading experiment/numerical analysis/seismic performance分类
建筑与水利引用本文复制引用
刘洪涛,闫秋实,杜修力..钢筋混凝土框架梁柱节点灌浆套筒连接抗震性能研究[J].建筑结构学报,2017,38(9):54-61,8.基金项目
国家自然科学基金项目(51421005,51678018),北京市交通行业科技项目(2016-gdsbssc-01-029). （51421005,51678018）
