Evaluation of seismic performance of an existing medium-rise reinforced concrete frame building in Bangkok | |
| Author | Serbpong Kiattivisanchai |
| Call Number | AIT Thesis no. ST-01-11 |
| Subject(s) | Reinforced concrete construction--Thailand--Bangkok Buildings--Earthquake effects--Thailand--Bangkok |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Bangkok, the capital city of Thailand, is at risk of distant earthquakes due to the ability of soft soils to amplify ground motions. To mitigate the risk, buildings must be designed to resist Bangkok's ground motions. Unfortunately, most existing buildings in Bangkok are designed and constructed without any consideration of seismic loading. However, it does not mean that they will collapse and create unacceptable life-safety hazards for their occupants. That is because buildings which have good structural systems may perform well under seismic action. Therefore, the evaluation of lateral capacity and seismic performance of existing buildings in Bangkok is needed. Since most existing buildings in Bangkok are reinforced concrete building, in this study, an efficient method to evaluate the seismic performance of reinforced concrete buildings based on the capacity spectrum method (CSM) recommended in ATC-40 and FEMA-273/274 is presented. In this method, at first a finite element model that can accurately simulate the actual nonlinear response of the building to equivalent static lateral earthquake forces must be formulated. To obtain a realistic buidling model, the site-specific features such as the stiffness and strength of pile foundations in Bangkok's soil, the mechanical properties of masomy infill walls, the overstrength of reinforcing steels are studied. In addition, the seismic demand spectra of Bangkok's earthquake ground motions are also studied. Then, the seismic capacity of the building is evaluated by "pushover analysis", and the results are presented in the fmm of normalized base shear-roof displacement relationship. Finally, the seismic capacity is compared with seismic demand from the expected earthquake ground motions at the building site, and the seismic perfo1mance can be determined. To demonstrate the method, a 9-story, existing reinforced concrete building in Bangkok is chosen as an example. The evaluation results indicate that the building has sufficient capacity to withstand the highest intensity earthquake ground motions expected in the Bangkok area despite the fact that the building was design without any consideration on seismic loading. A cost effective scheme to improve the seismic capacity of the building is also identified by using the evaluation method. |
| Year | 2001 |
| 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 Wamitchai |
| Examination Committee(s) | Worsak Kanok-Nukulchai ;Noppadol Phien-wej ;Barry, William J. |
| Scholarship Donor(s) | The German Academic Exchange Service (DAAD Partial) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |