山东建筑大学学报2024，Vol.39Issue(2)：16-26,11.DOI:10.12077/sdjz.2024.02.003
加固后钢筋混凝土十字形柱斜向抗震性能研究
Research on the oblique seismic behavior of reinforced concrete cross-shaped columns after reinforcement
摘要
Abstract
The oblique seismic performance of reinforced cross-shaped columns is a crucial factor affecting the safety performance of structures.In this paper,three kinds of reinforced concrete cross-shaped columns strengthened by new restraint strengthening methods are designed.On the basis of verifying the effectiveness of the finite element modeling method,the oblique low-cycle cyclic loading simulation is conducted.By analyzing the seismic performance indexes of the specimens such as hysteretic curve,skeleton curve,bearing capacity and ductility,the oblique seismic performance of the specimens is studied,and the formula for calculating the compression-bending capacity of the new restraint strengthening method cross-shaped columns is obtained by referring to the code.The results indicate that the local reinforcement increases the peak deflection of specimens by 7.4%～19.4%.The peak bearing capacity is increased by 29.2%～34.2%and ductility coefficient is increased by 7.5%～22.9%when CFRP strips are inserted at column ends.The peak bearing capacity and ductility coefficient are increased by 99.9%～105.5%and 17.4%～24.8%respectively.The three strengthening methods can enhance the oblique seismic performance of reinforced concrete cruciform columns,and the improvement degree from large to small is embedded CFRP plates at the column ends,embedded CFRP strips at the column ends,and local reinforcement of reinforcement grids.关键词
钢筋混凝土十字形柱/钢筋网格局部加强型/柱端嵌贴CFRP板条/柱端嵌贴CFRP板/斜向抗震性能Key words
reinforced concrete cross columns/local reinforcement of steel bar grid/sticking CFRP slats at the end of columns/embedding CFRP plates at the end of columns/oblique seismic performance分类
建筑与水利引用本文复制引用
刘春阳,王乐超..加固后钢筋混凝土十字形柱斜向抗震性能研究[J].山东建筑大学学报,2024,39(2):16-26,11.基金项目
国家自然科学基金项目(52278507) （52278507）
山东省自然科学基金项目(ZR2022ME160,ZR2018MEE044) （ZR2022ME160,ZR2018MEE044）
