Comparison on construction of strut-and-tie models for reinforced concrete deep beams

• 作 者: QIU Yi-ke LIU Xia
• 机 构: School of Civil Engineering
• 出 处: 中南大学学报（英文版）
• 发表日期: 2004年期
• 关键词: reinforced concrete deep beam topology optimization strut-and-tie model genetic

With consideration of the differences between concrete and steel,three solutions using genetic evolutionary structural optimization algorithm were presented to automatically develop optimal strut-and-tie model for deep beams.In the finite element analysis of the first method,the concrete and steel rebar are modeled by a plane element and a bar element,respectively.In the second method,the concrete and steel are assigned to two different plane elements,whereas in the third method only one kind of plane element is used with no consideration of the differences of the two materials.A simply supported beam under two point loads was presented as an example to verify the validity of the three proposed methods.The results indicates that all the three methods can generate optimal strut-and-tie models and the third algorithm has powerful capability in searching more optimal results with less computational effort.The effectiveness of the proposed algorithm III has also been demonstrated by other two examples.