Behaviour of nodal regions of reinforced concrete frames subjected to opening moments and proposals for their reinforcement

摘要: The strength and deformation capacity of concrete frames is typically governed by their nodal regions behaviour. This particularly relevant for frame corners subjected to opening bending moments, where premature brittle failures may develop depending on the reinforcement arrangement. Although some previous investigations have shown a significant dependence behaviour as function corner angle (a, measured between axes), most research has concentrated orthogonal (a =9 0). However, design recommendations obtained not be directly applicable (neither optimal) other angles, larger angles. In this paper, result an experimental theoretical investigation with = 125) presented. Sixteen tests were performed 400-mm thickness specimens representative actual moments. results are investigated means Elastic–Plastic Stress Fields strut-and-tie models leading number recom