| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 106 === In Taiwan, reinforced concrete is the one of the major materials used for the
construction of low-rise buildings. At present, the production technology of BCR and BCP is gradually matured. The advantage of BCR or BCP is that the welding volume is small and the cost is lower than that of the box column. If BCR and BCP are combined for construction, it will increase their chance in the construction market of the mediumrise and low-rise buildings. The ductility of BCP decreases due to the cold work. Therefore, the toughness of the BCP should be tested by means of structural tests. Because two thicknesses and two different types of beam-column connections, the internal diaphragm system and the external diaphragm system, are tested in this study. Therefore, four different types of beam-column structural specimens are produced for repeated load test to test its flexural toughness.
The experimental results show that: (1) The external transverse diaphragm test
column is affected by the welding at the corner of the bCP. The toughness is worse than that of the internal diaphragm type system. (2) Under the same column section, although the R25 series width-to-thickness ratio is slightly lower than the upper limit, it meets the deformation capacity (0.04 radians) of the maximum interlayer displacement angle required for seismic resistance. (3) For the internal diaphragm system specimen, there are truncations in the four corners and column plates are not supported as good as the case of the external transverse diaphragm. As a result, local buckling deformation is more likely to be occurred. (4) In the joint between the Rectangular hollow section column and the beam, in addition to controlling the welding heat, it is necessary to pay attention to the gap of the bead stack and whether or not the weld is generated. (5)results of ABAQUS simulation have the similar trends compared to those of testing results. However, numerical simulation is not able to reproduce the cracking damage and strain hardening.
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