| Author | Chalise, Saroj |
| Call Number | AIT Thesis no.ST-19-11 |
| 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-19-11 |
| Abstract | Low to mid-rise reinforced concrete (RC) buildings are commonly constructed in the urban areas with brick masonry as infill walls. The effect of the infill wall is not considered by current design codes in the design process of the structure. However, infill walls add early strength and stiffness to the structure. As a result, the seismic performance of the structure is different from that predicted during an earthquake. In addition, the practicing engineers can use standard response spectrum analysis (RSA) procedure prescribed in various design codes to determine the seismic demands for structural design purpose. However, the elastic force demands of all significant vibration modes are combined and then reduced by a response reduction factor (R) to get the inelastic design demands. Recent studies have shown that it may not be appropriate to reduce demand contributed by the same factor for the different arrangement of masonry infill walls present in the structure. The current study presents the modified response spectrum analysis (MRSA) procedure based on equivalent linearization (EL) approach. The idea is that the linear elastic model with elongated natural period and with additional damping can approximately represent the nonlinear seismic demands. This procedure provides an alternative way for response reduction but without R factors. Using 4 case study buildings (2-,3-,4- and 5- story high) with different configurations of infill walls (infilled frame, soft story, open front, and bare frame), the accuracy of this procedure is examined. The inelastic demands computed by the three-dimensional nonlinear time history analysis procedure in Perform-3D is used as a benchmark for different types and levels of the earthquake. It is shown that the MRSA procedure can estimate nonlinear seismic demands with reasonable accuracy for all case study buildings in both local and global level. |
| Year | 2019 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-19-11 |
| 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; |
| Scholarship Donor(s) | AIT Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2019 |