| dc.description.abstract | This study is a simple simulation for designing practical reinforced concrete beam-column joints with a design innovation called as design of plastic hinge relocation adopted from Guo[43] and other researchers[6-22]. A database was collected with specimens tested in failure mode of plastic hinge relocation or sliding shear. Several design recommandation was also collected to build the complete plastic hinge relocation design, basically referred from New Zealand design code NZS3101-2006. To perform the building structural analysis, commercial software ETABS and AutoDesk Revit was used.
By studying the measured values of the specimens with sliding shear failure adopted from references, it is concluded that sliding shear failure belongs to the brittle failure mode, and it often occurs after the specimen has the maximum load of the tested specimens, then the strength of the specimen drops suddenly. The statistical results show that when the shear stress is very high, the vertical sliding behavior of the specimen can be prevented by adding diagonal reinforcements.
In the design case study, using NZS3101 sliding shear design method and ACI318 shear friction design method to configure three different types of modified beams with plastic hinge relocation. Meanwhile, the reinforcement configurationwill be checked by the means of BIM for 3D visualization. In Case 1, with additional D29 bent-up rebar, the space between bending strengthening reinforcement and traditional shear design transverse reinforcement is smaller than Case 2 with combination of diagonal rebar and bent-up rebar. Considered about the steel bar constructability between Case 1 and Case2, it was recommended to utilize Case 2 to accomplish plastic hinge relocation design with sliding shear control. This will make not only reinforcement set up but also concrete casting become easier in-site. In Case3, the result shows the us longitudinal rebar can provide enough dowel force to resist shear friction, and the amount of reinforcement used in the three cases is the least, and the construction is easier. However, in this case, there is high risk for shear sliding due to the no diagonal rebar was placed. For the reason, for long-span beams with high shear sliding risk caused by high shear stress, it is recommended to adopt diagonal rebar configuration, and if the risk is low, it is recommended to adopt the form of shear friction method with longitudinal rebar as dowel bar. | en_US |