In order to study the flexural behavior of the new steel bar with high strength,high strain and high corrosion resistance instead of ordinary steel bar applied to concrete beam members,the short-term flexural behavior tests of two new high-strength reinforced concrete beams and ordinary reinforced concrete beams with equal strength design were carried out.The bearing capacity,deformation,cracks and failure modes of the two beams were compared and analyzed.Based on the test results,the test values of the flexural bearing capacity,maximum crack width,and deflection of the new high-strength reinforced concrete beam were compared with the code calculation values.The results show that the bearing capacity of the two beams with equal strength design is similar,but the failure modes are quite different.Under the same external force,the deflection,maximum crack width and crack height of new high-strength reinforced concrete beams are larger than those of ordinary reinforced concrete beams.The cracking moment and ultimate moment of new high-strength reinforced concrete beams are calculated according to the current code formula,which has enough safety reserves.In normal use stage,the deflection test value of new high-strength reinforced concrete beams under short-term load is in good agreement with the code calculation value,and the maximum crack width test value is larger than the code calculation value.
new high-strength steel barreinforced concrete beamsteel bar strainflexural bearing capacitycrackdeflection
NETL
NSTL
维普
万方数据
