000020175 001__ 20175
000020175 005__ 20170118182358.0
000020175 04107 $$aeng
000020175 046__ $$k2017-01-09
000020175 100__ $$aSun, Yuping
000020175 24500 $$aStructural Performance of Damaged Open-Web Type Src Beam-Columns With Bolt-Connected Batten Steel Plates After Retrofitting

000020175 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020175 260__ $$b
000020175 506__ $$arestricted
000020175 520__ $$2eng$$aThe structural performance of damaged open-web type of steel encased reinforced concrete (SRC) beam-columns with bolt- connected batten steel plates after retrofitting was experimentally investigated. The experimental parameters are axial load ratio, shear span ratio, and the maximum tip displacement of the columns during the initial loading. First, each column was cyclically loaded to the targeted displacement. Subsequently, the test columns were retrofitted and reloaded. The damaged portions of each column were retrofitted with the polymer cement mortar, and the epoxy resin was injected into the cracks.       Experimental results indicated that the measured stiffness of retrofitted columns was lower than the initial ones while the experienced displacements in each column were different. The lower stiffness might be attributed to deterioration of the concrete rigidity, low rigidity of the resin, and imperfect injection of the resin. Test results also indicate the column which experienced the larger displacement and higher axial load showed lower load carrying capacity, but the others showed approximately equal capacities to those of the initial columns. The lower load carrying capacity of the column resulted from buckling of the longitudinal reinforcements.       The crack width was measured to assess the relation of crack width and the experienced drift ratio. These are valuable to predict the degree of damage from the crack width after an earthquake.        Numerical analyses were also conducted to explain the retrofitted column behavior. The effect of strain hysteresis of concrete at first loading was considered for the behavior at second loading. Results predicted the experimental behaviors fairly well, which implies the validity of the analytical methods presented in this paper for evaluating the structural performance of retrofitted SRC columns in low axial load. 

000020175 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020175 653__ $$aCracks, Stiffness, Load carrying capacity, Epoxy resin, Polymer cement mortar

000020175 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020175 720__ $$aSun, Yuping$$iFujinaga, Takashi
000020175 8560_ $$ffischerc@itam.cas.cz
000020175 8564_ $$s1783585$$uhttps://invenio.itam.cas.cz/record/20175/files/690.pdf$$yOriginal version of the author's contribution as presented on USB, paper 690.
000020175 962__ $$r16048
000020175 980__ $$aPAPER