Numerical Simulation Analysis of Mechanical Properties of Square Steel Tubular High-strength Concrete Inner Set CFRP Round Pipe Flexural Members under Reciprocating Loads

摘要

Using Finite Element Method simulating respectively Square Steel Tubular High-strength concrete inner set CFRP round pipe beam and Ordinary Square Steel Tubular High-strength concrete beam. Comparative analysis of the effect of the Mechanical Properties of inner set CFRP round pipe to components. Studying on the effect of Mechanical Properties of Square Steel Tubular High-strength concrete inner set CFRP round pipe under with different arrangement ratio of CFRP and strength grade of concrete. Based on calculation we can see under cyclic loading Square Steel Tubular High-strength concrete inner set CFRP round pipe beams have quite different failure characteristics with Ordinary beams, the curve of moment-curvature is plump, having good energy absorption capacity and seismic behavior；The arrangement ratio of CFRP and the strength grade of concrete have great influence to the seismic behavior; of Square Steel Tubular High-strength concrete inner set CFRP round pipe beams, with the increasing of the layer number of CFRP round pipe, the improving of concrete strength grade, seismic behavior; of the beams is significant strengthened. Showing that inner set CFRP round pipe can significantly increase seismic behavior of Square Steel Tubular High-strength concrete beams.