Research Progress on Buckling of Longitudinal Reinforcement Under Earthquake
During the outbreak of an earthquake,the pier columns in reinforced concrete(RC)structures are usually subjected to horizontal forces and vertical forces under reciprocating loads.When the transverse constraints in the structure are insufficient,the longitudinal reinforcement may have obvious transverse deformation.The bearing capacity and ductility of the structure are thus significantly reduced,and it is difficult to repair.Therefore,it is of great significance for structural design and construction to study the buckling mechanism of longitudinal reinforcements under compression.Firstly,the research on longitudinal reinforcement buckling based on the direct compression test of a single reinforcement was summarized,and the analysis shows that the main influencing factors of reinforcement buckling are the slenderness ratio and yield strength.Secondly,the research progress of reinforcement buckling based on the direct compression test of RC short columns was summarized,and the possible factors influencing longitudinal reinforcement buckling under complex interaction were described.Moreover,combined with the development status of civil engineering,the research progress of longitudinal reinforcement buckling in pier columns with new materials and structures was discussed.Finally,it is concluded that the current research on longitudinal reinforcement buckling lacks a theoretical method for determining the direction and extent of reinforcement buckling.Further investigations are needed to address the overall buckling issues of longitudinal reinforcements and the longitudinal reinforcement buckling concerns in novel structures.Subsequent studies should comprehensively consider the effect of factors such as corrosion,loading history,cross-sectional geometry,and interactions among materials on longitudinal reinforcement buckling.
国家科技期刊平台
NSTL
万方数据
