Experimental study on flexural performance of reinforced concrete beams with HRB635 high-strength reinforcement
Flexural performance tests on 11 beams of full-scale reinforced concrete(RC)with HRB635 high-strength reinforcement were carried out to investigate their damage mechanism,failure mode as well as strength and ductility.The feasibility of the Chinese code formulae for calculating the ultimate flexural load bearing capacity and the maximum crack width of flexural components was also assessed for RC beams with high-strength reinforcement.The results indicate that the mechanical behavior and damage mechanism of the RC beams with HRB635 high-strength reinforcement are basically identical to those of RC beams with common reinforcement.The tensile high-strength reinforcements yielded first,then the compressive concrete crushed,and the tensile strength of the high-strength reinforcements can be fully utilized.The ultimate flexural moments of the test specimens calculated by the Chinese code were close to those of the test values,indicating that the flexural load bearing capacity of the beams with high-strength reinforcement can still be calculated according to the current Chinese code.The tested maximum crack widths of the specimens under serviceability limit state all exceeded the limit value of flexural structural components under short-term load,indicating that the design of RC beams with high-strength reinforcements may be controlled by the serviceability limit state rather than ultimate limit state.The calculated maximum crack widths were close to the tested ones,while the calculated results were slightly larger.
HRB635 high-strength reinforcementreinforced concrete beamflexural performanceexperimental study
NETL
NSTL
万方数据
维普
