In this work, the behavior of reinforced concrete columns under biaxial bending is studied. This work aims at studying strengthening by using carbon fiber polymer (CFRP). The experimental includes investigation eight (150*150*500mm) tested several load conditions. Variables considered in test program include; effect eccentricity and longitudinal reinforcement (Ø12mm or Ø6mm). Test results are d...

Abstract In order to study the seismic behavior of bottom large-bay frame with different special-shaped columns, numerical models columns ordinary, dark and square at are established using finite element analysis in ANSYS. The three type Frame performed nonlinear time-history dynamic method under earthquakes. characteristics response RC conducted. weak parts development plastic hinges on end be...

This study presents the results of a refined numerical investigation meant at understanding time-dependent cyclic behavior reinforced concrete (RC) bridge columns under chlorides-induced corrosion. The chloride ingress in cross-section column is simulated, taking into account effects temperature, humidity, aging, and corrosion-induced cover cracking. Once partial differential equations governin...

Given the deterioration of civil infrastructure throughout world, developing more efficient repair and strengthening is essential. Jacketing one most common methods for retrofitting reinforced concrete (RC) columns. Notably, using engineered cementitious composite (ECC) within jacketing area increases bearing capacity significantly enhances ductility The recent development ECC with suitable com...

Based on tests on six L-shaped RC columns with 500 MPa steel bars, the effect of axial compression ratios and stirrup spacing on failure mode, bearing capacity, displacement, and curvature ductility of the specimens is investigated. Test results show that specimens with lower axial load and large stirrup characteristic value (larger than about 0.35) are better at ductility and seismic performan...

The enhanced structural performance of Reinforced Concrete (RC) columns retrofitted by Fiber Reinforced Polymer (FRP) composite jackets, has been well demonstrated and an increasingly large number of bridge and building columns have been retrofitted with such jackets in the United States and elsewhere. However, seismic damage such as debonding between the jacket and the column that can consider...

When a difficult separation cannot be accomplished by changing the column and mobile phase conditions, two alternate methods are available. The most common approach is to increase the column length with identical packing material, and the second approach is to recycle the sample through the column. However, the former approach might lead to a limitation to the separation efficiency due to an in...