Seismic Performance Evaluation of Existing RC Frame Structure with Non-Seismic Steel Bar
CHEN Binbin
LYU Wenlong
LIN Huiting
LIANG Haodong
Abstract：To evaluate existing reinforced concrete(RC)frame structures using non-seismic steel bars,the influences of the tensile strength to yield strength ratio,over yield strength ratio,and elongation of the steel bars on member performance were compared.A seismic performance evaluation method for existing frame structures was discussed by sampling inspection of steel bars and elastoplastic time history analysis under severe earthquakes,so as to quantitatively analyze the influences of three seismic material indexes of the non-seismic steel bars on the structural performance.An existing residential building was investigated,and the performance states of the structure and the members under severe earthquakes were demonstrated by using the above evaluation method.The results show that although the non-seismic steel bars fail to meet the material specifications for the seismic steel bars,the members meet the stated performance levels with a failure mode of"strong column and weak beam",when subjected to severe earthquakes.In addition,the structure satisfies the stated seismic performance objective.
Keywords：Non-seismic steel barTensile strength to yield strength ratioOver yield strength ratioElongationExisting frame structureSeismic performance evaluation
Publication Date：2024-09-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 91-98 )