Numerical Analysis Of Seismic Performance On RC Columns Strengthened With High Performance Ferrocement Laminate (HPFL)

High performance ferrocement laminate is strengthening technology which has justemerged at home and abroad, with high performance mortar as bonding material, with highstrength steel wire mesh, steel bar, steel wire mesh as bearing material, and has thecharacteristics of high-strength, fire-resistance, corrupt-protection, non-pollution and easyconstruction, etc. At present, the study of RC column strengthened with high performanceferrocement laminate at home and abroad has the following deficiencies: the experimentalstudy on seismic performance of strengthened columns are less, and mainly for the axialcompression column; systematically have not systematically analyse the influence factors ofthe seismic behavior of columns; the restoring force model of reinforced columns is not putforward. This paper mainly investigates the influence factors of the seismic behavior ofcolumns strengthened with high performance ferrocement laminate, and establishes therestoring force model of eccentric compression column strengthened with high performanceferrocement laminate, provides a theoretical guidance for experimental research.Based on the seismic test by of RC column strengthened with high performanceferrocement laminate, This paper establish numerical model using ansys, and analysis itsseismic performance. Mainly includes the following three aspects:(1) establish the finiteelement models, which include unreinforced column of the axial compression ratio of0.24、reinforced column of the axial compression ratio of0.24、reinforced column of the axialcompression ratio of0.48, compared calculation results with test results, verify the reliabilityof finite element model and its calculation;(2) Based on the above comparative analysis, thefactors of the stirrup ratio, longitudinal reinforcement ratio, concrete strength, steel wirequantity effect on the seismic behavior of strengthened columns were researched;(3) furtherresearch the seismic performance of eccentric compression reinforced columnThrough the above research work, the following major conclusions:(1) the calculatedvalues are in good agreement with the experimental values, the finite element model canrepresent good practice;(2) with the increasing of the stirrup ratio, longitudinal reinforcement ratio, concrete strength, and steel wire quantity, ultimate bearing capacity and ductility ofstrengthening columns can be improved2%~28%;(3) with the increasing of vertical pressureeccentric, stirrup and steel wire strain of strengthening columns develop quickly, ultimatebearing capacity of strengthening columns reduce2%~13%, their ability of energyconsumption reduce35%, and their stiffness and ductility decrease;(4) based on the aboveanalysis, this paper establish the three line restoring force model and skeleton curve model ofeccentric compression column.