Seismic Damage Behavior of Aeolian Sand Concrete Columns with an Inner Square Steel Tube

Abstract

Inordertopromotetheapplicationofaeoliansandinsteel-concretecompositestructures,theaeoliansandconcretecolumnswith aninnersquaresteeltubeisproposedinthispaper.Thiskindofcolumniscomposedofaeoliansandconcrete,reinforcingsteel, and an inner square steel tube. The seismic damage behavior of the column was studied through cyclic loading test and damage analysisonsevenspecimenswithdifferentstructuralforms.Theseismicdamageindicesofthespecimensinthisstudyincludethe failuremode,bearingcapacity,ductility,stiffness,hysteresisbehavior,andenergydissipation.Then,adamagemodelofthiskind of column is proposed. The study results show that installing an inner square steel tube can significantly improve the seismic damagebehaviorofaeoliansandconcretecolumns.Thismodeofconstructioncanbeusedtoenhancethereplacementpercentage ofaeoliansand.Inaddition,thedamagemodelproposedinthispaperagreeswellwiththeexperimentalresultsandcanbeusedto evaluate the damage degree of the aeolian sand concrete columns with an inner square steel tube.