EXPERIMENTAL STUDY ON CONFINED MASONRY WALLS PERFORMANCE UNDER EARTHQUAKE LOADS
ABSTRACT: <br /> <br /> <br /> <br /> <br /> Typical house structures in Indonesia are commonly built using masonry wall confined by reinforced concrete frame. Such structures often have insufficient performance in resisting seismic loads. Past earthquakes show th...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/13540 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | ABSTRACT: <br />
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Typical house structures in Indonesia are commonly built using masonry wall confined by reinforced concrete frame. Such structures often have insufficient performance in resisting seismic loads. Past earthquakes show that detailings of elements, such as: frame dimensions, beam-column joint and wall-frame anchorage are the factors that significantly contribute to structural performance in the event of earthquake. Very few experimental studies have been conducted to verify the performance of masonry wall confined by reinforced concrete frame. Therefore, a study was conducted to better understand the behavior of such structure under seismic loads. In this research, ten (3mx3m) wall specimens that represented simple house wall panels in Indonesia were tested. The aim of the experimentation is to study the effect of variation on the specimens frame such as: beam-column dimensions, beam column joint in form of development of reinforcement of 40d with 90 degrees hook, reinforcement type of deformed bar and plain bar, toothing on the wall-frame connection, wall-frame anchorage, continuous anchorage between columns, additional haunch on beam-column joints and lintel beam, to the overall performance of the wall in resisting lateral loads. The experimental study consisted of material tests to obtain the material properties, and tests of wall specimens. In-plane lateral cyclic loads were applied to the wall specimen to simulate the seismic loads. The performance parameters observed are: crack patterns and failure mechanism, lateral capacity, energy dissipation, ductility, and confined masonry wall overall performance. The results show that using good detailing on reinforced frame confinement for masonry wall will develop strut and tie mechanism in resisting lateral loads. Detailing of toothing and haunch shifted weak areas of the walls, which developed poor performance compared to the other specimens. Continuous anchorage between columns and lintel beam preserved frame confinement to the wall and therefore provide the best performance among all the specimens in resisting lateral loads. |
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