Seismic evaluation of beam-column frame buildings with nonductile reinforcement details | |
| Author | Pichit Phatiwet |
| Call Number | AIT Thesis no.ST-02-15 |
| Subject(s) | Reinforced concrete construction Concrete construction--Mathematical models Concrete beams--Mathematical models |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Most existing buildings in Bangkok are reinforced concrete buildings, which are designed and constructed by considering only gravity loads without significant lateral loads. Many critical nonductile reinforcement details typically found in existing buildings in Bangkok can be identified as follows: 1) the discontinuity of positive beam reinforcements into columns, 2) lapped splices of column reinforcements just above floor level, and 3) little or no transverse reinforcement within beam-column connections. Development of modeling techniques of these features is carried out fundamentally based on the recommendations in ATC-40 and FEMA-273/274. Several analysis case studies are conducted to investigate the effects of each nonductile reinforcement detail on overall seismic capacity of buildings. In the analysis, one typical existing RC beam-column frame building is selected and used as an example. In the process of modeling, realistic approaches that consider actual loadings and inelastic behavior of building components are used. Furthermore, in the seismic capacity evaluation, several important factors that significantly affect the seismic performance of building (i.e. rigid end offsets and formulations of local failure within the span of beam components) are taken into account. The analysis method is nonlinear static pushover. The obtained results are presented in the form of normalized base shear - roof displacement relationship. For the building analyzed in this study, considering rigid end offsets, the overall stiffness of building can considerably increase. Furthermore, the obtained results mainly indicate that the lack of transverse reinforcements within beam-column connections is the most important issue that can lead to brittle shear failure of connections in the building. With considering this issue in the seismic evaluation, the ductility and deformability of the building are greatly reduced due to failure in beam-column connections. In summary, improvements of the capability of mathematical building models are carried out to make a reliable prediction of the real behavior of RC beam-column frame buildings under seismic loadings. |
| Year | 2002 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| 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) | Worsak Kanok-Nukulchai ;Kim, Kidu |
| Scholarship Donor(s) | Royal Thai Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |