Seismic evaluation of low-to mid-rise RC frame buildings with masonry infill walls by using modified response spectrum analysis (MRSA) | |
| Author | Suriyapoom Rujichai |
| Call Number | AIT Thesis no.ST-23-02 |
| Subject(s) | Buildings--Earthquake effects--Evaluation Earthquake engineering Structural engineering Earthquake resistant design |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | A great number of buildings were created using RC frames with masonry infills, particularly for low to medium-rise buildings. It is well known that the interactions between the frames and the infill walls can have significant effects on the seismic response. The infill walls can increase stiffness and strength of the frame, which response for higher seismic demand. In general, most of the codes do not give specific requirements or guidelines to evaluate the influence of masonry infill due to its complexities. It is crucial that the design and evaluation of earthquake resistant structures can predict seismic demands with sufficient accuracy. Most of the practicing engineers prefer Equivalent lateral Force procedure (ELF) and Standard Response spectrum procedure (RSA) to evaluate the seismic demands. However, ELF procedure has its own limitations, for example it cannot give accurate results when using with irregular building or account for higher mode effect. In addition, recent studies shown that RSA procedure underestimates the seismic demands due to using the same response reduction factor(R) for all mode which is not appropriate because different modes undergo different level of nonlinearity. The most accurate method to predict seismic demand of the buildings is Nonlinear Linear response history analysis (NLTHA). Nevertheless, this method is time consuming and nonlinear modelling techniques is needed which most practicing engineers may not have resources to do so. A simplified analysis procedure for RC building is necessary to overcome the complexity imposed by NLRHA, limitations of ELF procedure, inaccuracy of standard RSA and account for interaction effects. This study presents a Modified Response spectrum Analysis (MRSA) procedure as an alternative method to evaluate the seismic response of the building without any nonlinear modelling. MRSA procedure uses the concepts of UMRHA and Equivalent Linearization method. The underlying concept is that the linear elastic model with elongated period and additional damping can approximately represent the nonlinear seismic demands. |
| Year | 2023 |
| 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) | Thanakorn Pheeraphan;Punchet Thammarak |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2023 |