Experimental study on flexural properties of high-strength stainless steel UHPC beams
In this experiment,six UHPC beams are designed,four with duplex stainless steel bars,one with austenitic stainless steel bars,and one with ordinary steel bars as the control group.The beams are subjected to bending tests by three-point loading.The change of bearing capacity of high strength stainless steel reinforced UHPC beam is studied by the changes of parameters such as steel bar diameter,steel bar type,and section size.Through experiments,it is found that the bearing capacity of UHPC beams configured with duplex stainless steel bars is higher than that of ordinary steel bars.The bearing capacity of beams equipped with austenitic stainless steel bars is also improved to a certain extent than that of beams configured with duplex stainless steel bars.With the increase of reinforcement ratio,the development speed of cracks can be slowed down.According to the assumption of plane section,the stress of UHPC and stainless steel bars-The strain relationship is proposed to express the flexural bearing capacity of the stainless steel UHPC beam,which can better reflect the flexural performance of the beam.The maximum crack width correction factor is introduced,and the revised maximum crack width formula can more accurately calculate the maximum crack width of stainless steel UHPC beams.
high strength stainless steel rebarUltra High Performance Concrete(UHPC)bending capacitycrack width
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