| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 98 === Bearing wall structures play an important role in common buildings and underground structures, and they usually have to make some openings in the wall structure as window, door or other facilitate essential services , which influence the performance and failure mode of RC walls very much. The objective of this investigation is to compare the bearing capacity and performance of RC walls with different reinforcements arrangement around openings.
According the American Concrete Institute 318 Standard, they have only a little guideline and information for reinforcement around openings of RC walls ,and they doesn’t mention how to design and arrange reinforcement around openings in detail in the content. Thus, the main motivation of this research is to investigate the influence of reinforcement arrangement around opening of bearing wall structure.
There are seven small-sized bearing wall specimens, and they are tested for bearing capacity under single point loading. The main variables investigated are the opening or not and reinforcement arrangement around openings. We measured the strain of rebars and concrete and observed the failure mode at the same time. The result shows that the reduction ratio of load capacity between opening specimens and non-opening specimens almost equal to the reduction ratio of cross-section area, and we can design the reinforcing steel ratio according to the value of reduction ratio. And the reinforcing steel arranged according to the trajectory of principal strain shows the most bearing capacity in walls.
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