Influence and Analysis on the Bearing Capacity of Reinforced- Concrete-Frame Node in Beam and Plate's Constraint

摘要

According to the domestic and foreign various building codes and a kind of limit fitting formula, to calculate and analyze the compressive bearing capacity of sandwich reinforced concrete beam-column nodes in a high-rising frame structure engineering, and to compare with the results calculated by Midas. They shown those are the facts that can't be neglected, the compressive bearing capacity of the sandwich node core area concrete in beam and plate's constraint would improve and the amplitude of improving would be great. But current Chinese building codes haven't included them in the formal design provisions, these ways have to be perfected. In the same time, beam and plate' constraint would also have a certain effect to the shear bearing capacity. By contrast, the shear bearing capacity in considering beam and plate' constraint would increase 12% to 24%, it would get to 91% of the limit fitting formula calculation value when the short side was sheared, and it is 92% when the long side was sheared. That shown it is quite perfect in considering the effect of the orthogonal beam-plate constraints in domestic seismic code.