Experimental study on seismic performance of gravity load design columns retrofitted with glass fiber reinforce polymer | |
| Author | J. Yaw Sar |
| Call Number | AIT Thesis no.ST-14-03 |
| Subject(s) | Buildings, Reinforced concrete--Earthquake effects Earthquake resistance design Columns, Concrete |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-14-03 |
| Abstract | Many of reinforced concrete buildings are designed to resist gravity load exclusively. They are called GLD buildings. Those buildings are vulnerable to sudden collapse during earthquake because earthquake produces lateral shaking forces to the buildings. That force induces columns failure which triggers GLD buildings’ collapse. To make GLD buildings resistant to lateral loads, the building must be either stronger or more ductile than now. It is demanded to enhance the performance of those GLD buildings in the most effective and economical way. Many researches have done indicating plastic hinge is the weakest zone of all GLD columns where maximum bending moment is induced. The collapse mechanism and collapse location has been identified in previous studies for columns with different shear heights with or without lap splice. It was successful to retrofit the GLD columns with carbon fiber polymer in previous works. Now, the same retrofitting procedure is repeated using GFRP instead of CFRP. Therefore, the performance of GLD columns, GLD column retrofitted with CFRP and GLD columns retrofitted with GFRP can be compared simultaneously. The test includes four cantilever columns with three different aspect ratios varying from 3.14 to 5.85. A column with traditional lap splice is also included. A constant axial load ratio of 0.15 was granted representing the gravity load. All the columns are wrapped by GFRP using epoxy resins. The columns are tested under quasi-cyclic seismic loading. It is observed that the performance of all the columns is improved obviously. The brittle GLD columns become more ductile due to confinement effect of GFRP wraps. The columns previously dominated in shear failure mode have shifted to flexural failure mode after retrofitting. The displacement capacity of retrofitted columns has remarkably increased |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-14-03 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai; |
| Examination Committee(s) | Anwar, Naveed;Punchet Thammarak;Kittipoom Rodsin; |
| Scholarship Donor(s) | Greater Mekong Subregion ( GMS ) Scholarship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2014 |