Experimental Study on Eccentric of GFRP-confined ECC Short Columns
That fiiber reinforced polymer(FRP)constrained engineering fiber reinforced cementitious composites(ECC)axial compression columns can significantly improve the bearing capacity and ductility.But the degree and mecha-nism of performance improvement of FRP constrained ECC columns under eccentric compression should be studied.Based on this,vertical loading tests were conducted on ECC short columns constrained by glass fiber reinforced polymer(GFRP)with experimental variables of eccentricity(0,10,30,50 mm)and FRP layers(0,2,4 layers).And the test results were analyzed.The research results indicate that the compression side FRP fractures and the concrete crushes during small eccentricity failure.While during large eccentricity failure,the tensile side FRP tears and transverse cracks of concrete occur almost simultaneously.Under axial compression,both the axial deformation and compressive strength significantly increase;Under the action of bias,the compressive bearing capacity de-creases with the increase of eccentricity,while the ultimate displacement shows no significant change pattern.In addition,both the bearing capacity and ductility increase with the increase of FRP layers.
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