In-plane behavior of reinforced masonry walls subjected to lateral forces : an analytical approach | |
| Author | Klewvarin Sonthisuwan |
| Call Number | AIT Thesis no.ST-23-01 |
| Subject(s) | Reinforced masonry Structural design 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 | The damage or collapse of the low-rise building due to the earthquake often occurred on the masonry wall which is an unreinforced structure. To improve the performance of the wall to resist the lateral force, many researchers have developed reinforced masonry wall. However, with the lack of research and acceptable supporting evidence for using reinforced masonry wall system in Thailand, Thai Seismic Standard (DPT 1302-61) does not permit the use of reinforced masonry wall system. Thus, this study represents the in-plane behavior of reinforced masonry wall subjected to lateral force in analytical approach. The finite element modeling of reinforced masonry wall is formalized the modeling method and verified the accuracy by comparing the results with the experiment. The comparison displays a good match with the experimental response. This modeling method will be used for the parametric study on the in-plane response of fully grouted reinforced masonry wall with various influencing parameters consist of aspect ratios (0.65, 0.85, 0.93, and 1.22), horizontal reinforcement ratios (min.{u1D70C}â, 2*min.{u1D70C}â), axial stress (0, 10% fâm), and wall thicknesses (190, and 140 mm.). The results illustrate that increasing horizontal reinforcement ratio, axial stress, and wall thickness can lead to an increase of the shear capacity while the influence of aspect ratio has the opposite result. To generate the shear capacity equation considering the effects of different parameters, the shear resistance on the parametric study will be classified into two groups which separate the result for the observation of the accuracy. Two equations are validated with the several experiments of the previous researchers and was observed that the equation which limits aspect ratio between 0.85 and 1.22 is able to predict shear capacity quite accurately compared with the experiment results. Sometime, this equation is too conservative. For the equation which limits aspect ratio between 0.65 and 0.85, the results appear to be overly conservative hence, the equations of both aspect ratio ranges were modified by include the effect of vertical reinforcement ratio and limiting the maximum shear capacity. It was observed that the modified equations were conservative for shear capacity prediction while the initial equations were also conservative when including the limit on maximum shear capacity because the contribution from the effect of vertical reinforcement ratio is less than other parameters under shear dominated behavior. Consequently, both equations are considered safe and conservative for shear prediction capacity. The initial equations were chosen for generating the design charts with material strength of grouted masonry commonly use in Thailand which provide good prediction on shear capacity as well. |
| 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;Punchet Thammarak (Co-chairperson) |
| Examination Committee(s) | Anwar, Naveed; |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2023 |