碳纤维布加固钢筋混凝土柱的弯矩-曲率关系分析

Analyses of the Moment-Curvature Relationship of RC Columns Strengthened with Carbon Fiber Sheets

编制了碳纤维布加固钢筋混凝土柱截面的弯矩 -曲率关系分析程序 ,并采用该程序探讨了多种工况下碳纤维布配箍特征值、轴压比、截面尺寸、箍筋配箍特征值、纵筋配筋率和混凝土强度等参数对碳纤维布加固钢筋混凝土柱截面的弯矩 -曲率关系的影响 .在此基础上 ,提出了截面弯矩 -曲率关系三折线模型中各无量纲特征参数的确定方法 .结果表明 ,所提出的的截面弯矩 -曲率关系三折线模型中 。

A computer program was developed to analyze the moment-curvature relationship o f RC columns strengthened with carbon fiber sheets (CFSs). By using the proposed program, the effects of various parameters—the characteristic value correspond ing to carbon fiber sheets, the axial compression ratio, the sectional dimension , the characteristic value corresponding to transverse reinforcement, the longit udinal reinforcement rate and the concrete strength—on the moment-curvature re lationship were analyzed in different operation conditions. On the basis of the analytical results, methods to determine the nondimensional characteristic param eters in a trilinear model describing the sectional moment-curvature relationsh ip of the RC columns were then proposed. The results show that the regression fo rmulas for the characteristic parameters in the proposed trilinear model are of excellent precision.