| Author | Ekkachai Yooprasertchai |
| Call Number | AIT Thesis no.ST-07-04 |
| Subject(s) | Buildings, Reinforced 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-07-04 |
| Abstract | Many existing reinforced concrete structures were designed before the introduction of modern seismic code and are thus vulnerable to collapse in the event of an earthquake. It is often more economically feasible to retrofit these structural components than to completely replace them. A brace with a stable force-displacement behavior and enable yield in compressive force as well as tensile force called buckling-restrained brace is fascinatingly introduced to retrofit reinforced concrete structures in this study. The development of three BRBs was conducted by quasi-static cyclic loading test. The specimens were made of A36 steel yielding core plate with grout fill in a hollow structural section (HSS) casing. Each specimen was bolted to gusset plates at each end of the brace. One end of the brace was connected to the base connected to strong floor, and the actuator imposed horizontal displacement to the other end of the brace. The BRB must be tightened to required force to ensure slip-critical joint condition. Furthermore, the detail of end of plastic region is critical criteria to seismic performance of the brace. The proposed weld bead and shear key system illustrates greatly improvement in that region. Finally, the completed BRB demonstrates a stable force-displacement characteristic up to a story drift of 4.00%. The successful brace was connected to reinforced concrete column by using chemical anchor studs. The overall system significantly improved the seismic performance when compared to blank concrete column. The specimen displays stable characteristic until failure at story drift of 2.50%. |
| Year | 2007 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-07-04 |
| 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) | Raktipong Sahamitmongkol;Kato, Yoshitaka;Sutat Leelataviwat; |
| Scholarship Donor(s) | THAILAND (HM King); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2007 |