A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic retrofit of substandard beam-column joint by planar joint expansion
Abstract A seismic retrofit technique for existing reinforced concrete beam-column connections using planar joint expansion is proposed. The method is based on a two-dimensional expansion of beam-column joint using cast in-situ concrete and dowel bars. The method is economical and architecturally acceptable. Three half-scale sub-standard beam-column specimens were tested under quasi-static cyclic loading. One was control specimen and the other two were retrofitted specimens with triangular and square joint expansion. According to test results, the control specimen showed brittle joint shear failure while retrofitted specimens showed beam flexural failure. The strength, stiffness, energy dissipation and ductility of retrofitted specimens were greatly improved. The planar joint expansion is effective to reduce joint shear stress and improve anchorage bond of beam bar within the joint. The plastic hinge formation can be moved away from column face, thus preventing joint shear failure. The triangular and square expansions perform almost equally well. The construction joints formed at the interfaces between specimen and joint expansion do not produce an adverse effect in cyclic behavior.
Seismic retrofit of substandard beam-column joint by planar joint expansion
Abstract A seismic retrofit technique for existing reinforced concrete beam-column connections using planar joint expansion is proposed. The method is based on a two-dimensional expansion of beam-column joint using cast in-situ concrete and dowel bars. The method is economical and architecturally acceptable. Three half-scale sub-standard beam-column specimens were tested under quasi-static cyclic loading. One was control specimen and the other two were retrofitted specimens with triangular and square joint expansion. According to test results, the control specimen showed brittle joint shear failure while retrofitted specimens showed beam flexural failure. The strength, stiffness, energy dissipation and ductility of retrofitted specimens were greatly improved. The planar joint expansion is effective to reduce joint shear stress and improve anchorage bond of beam bar within the joint. The plastic hinge formation can be moved away from column face, thus preventing joint shear failure. The triangular and square expansions perform almost equally well. The construction joints formed at the interfaces between specimen and joint expansion do not produce an adverse effect in cyclic behavior.
Seismic retrofit of substandard beam-column joint by planar joint expansion
Chaimahawan, Preeda (author) / Pimanmas, Amorn (author)
Materials and Structures ; 42 ; 443-459
2008-05-31
17 pages
Article (Journal)
Electronic Resource
English
Substandard beam-column connection , Joint shear failure , Seismic retrofit , Planar joint expansion , Plastic hinge Engineering , Building Materials , Civil Engineering , Operating Procedures, Materials Treatment , Theoretical and Applied Mechanics , Materials Science, general , Structural Mechanics
Seismic retrofit of substandard beam-column joint by planar joint expansion
| Online Contents | 2009
Seismic retrofit of substandard beam-column joint by planar joint expansion
| Online Contents | 2008
Seismic retrofit of substandard beam-column joint by planar joint expansion
| British Library Online Contents | 2009
Rehabilitation of substandard beam-column joint using geopolymer
| Elsevier | 2021
Cyclic stress development in substandard beam–column joint
| Online Contents | 2011