Numerical Investigation on Steel Square HSS Columns Strengthened with Polymer-mortar

Abstract

This paper presents the results of finite element (FE) analysis of axially loaded square hollow structural steel (HSS) columns, strengthened with polymer-mortar materials. Three-dimensional nonlinear FE model of HSS slender columns were developed using thin-shell element, considering geometric and material nonlinearity. The polymer-mortar strengthening layer was incorporated using additional layers of the shell element. The FE model has been performed and then verified against experimental results obtained by the authors [1]. Good agreement was observed between FE analysis and experimental results. The model was then used in an extended parametric study to examine selected AISC square HSS columns with different cross-sectional geometries, slenderness ratios, thicknesses of mortar strengthening layer, overall geometric imperfections, and level of residual stresses. The effectiveness of polymer-mortar in increasing the column’s axial strength is observed. The study also demonstrated that polymer-mortar strengthening materials is more effective for higher slenderness ratios. An equivalent steel thickness is also accounted for the mortar strengthened HSS columns to discuss the effectiveness of polymer-mortar strengthening system. The polymer-mortar strengthening system is more effective for HSS columns with higher levels of out-of-straightness. Level of residual stress has a slight effect on the gain in the column’s axial strength strengthened with polymer-mortar.

Synthesis, characterization, and multifunctional applications of novel metal complexes based on thiazolylazo dye

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“…EB is a sensitive fluorescent probe that emits enhanced emissive properties in the presence of DNA, as is well known. [ 76 ] In order to improve and support the type of complex binding with CT‐DNA, the absorption and emission measurements of EB bound DNA were tested using Mn (II), Co (II), Ni (II), and Cu (II) complexes. The absorption and emission spectra of EB bound CT‐DNA in the absence and presence of various concentrations of the metal complexes were shown in Figure 11.…”

Characterization, theoretical computation, DNA‐binding, molecular docking, antibacterial, and antioxidant activities of new metal complexes of (E)‐1‐([1H‐1,2,4‐triazol‐3‐yl]diazenyl)naphthalen‐2‐ol

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Effect of Nitrogen Doping on Threshold Voltage in Amorphous Ga2Te3 for Application of Selector Devices

“…The optical bandgap energy () of the thin films is determined from Tauc plots based on the relation ( αhν ) n = α 0 ( hν − ), where α , h , ν , n , and α 0 are the absorption coefficient, the Planck's constant, the frequency of the photon, the exponent that characterizes the optical absorption process, and an adjustable constant, respectively. [ 10,21,22 ] In case of a‐Ga 2 Te 3 , n = 1/2 is applied because of its nature of an indirect bandgap semiconductor. [ 23–26 ] The can be estimated from the x intercept on the plots of ( ahν ) 1/2 versus hν, as shown in Figure 1a.…”