In-plane behavior of reinforced masonry walls subjected to lateral forces : an experimental approach | |
| Author | Thittiya Ruangsak |
| Call Number | AIT Thesis no.ST-21-19 |
| Subject(s) | Reinforced masonry Masonry |
| 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-21-19 |
| Abstract | Masonry construction which was previously built without any reinforcement as in-filled between structural frame. During earthquake occur, the damages are concentrated on masonry walls rather than frame. So, structural systems required to be more ductile to resist earthquake forces. In Thailand, it has not been listed as an acceptable lateral load resisting structure in a lot and this structure in seismic design standards. All specimen in this study were designed by strength design of masonry wall provisions following ACI 530-05. Four full-scaled reinforced masonry walls, which consists of two specimens consist of (20) DB10 for vertical reinforcement and (1) RB6 with spacing 200mm. for horizontal reinforcement. Two specimens with boundary elements consist of (24) DB10 for vertical reinforcement, (1) RB6 with spacing 200mm. for horizontal reinforcement and (1) RB6 for stirrup the boundary elements, with total dimensions of 2000 mm x 2600 mm x 190 mm were subjected to lateral cyclic loading in this research. The main purpose is to study in-plane behavior, including the effects of axial load, which is 10 percent of compressive strength of masonry, and boundary element. From the test result show that the overall behavior began with flexural cracking at the mortar masonry block surface in the lower half region and failed by flexure and shear failure. Strength design of masonry wall provisions based on ACI 530-05 can be implemented for the design of reinforced masonry walls in Thailand using local materials such as masonry block, natural river sand, and Portland cement, and the nominal shear strength from ACI 530-05 nearly matches the actual results. The effect of axial load obviously gives higher performance in terms of load resistance for both specimens without and with boundary elements. Boundary elements can delay the initial cracking and overall lateral movement, as ultimate drift, and improve load resistance on both specimens without and with axial load. In addition, boundary elements can enhance energy dissipation at the same drift. The capacity of reinforced masonry walls improves when boundary elements are designed and detailed in accordance with ACI 530-05 standards, along with local materials and general design practices in Thailand. In terms of stiffness degradation, because the specimen has both boundary elements and axial load, stiffness degradation may be improved. |
| Year | 2021 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-21-19 |
| 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;Punchet Thammarak (Co-Chairperson); |
| Examination Committee(s) | Anwar, Naveed; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2021 |