再生混凝土无腹筋梁剪切强度尺寸效应试验及仿真

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中图分类号：TU528；TB115.1 文献标志码：B

Abstract：To studythe size efect of shear strength of recycled concrete beams without web reinforcement，a group of physical tests are carried out under the condition of a constant shear span ratio. The results show that the shear strength of the test beam generally decreases with the increase in beam section height，and a regression formula of the shear strength is obtained，which can quantify this effect. The rationale and feasibility of the explicit finite element method solving the ultimate load of concrete structures are briefly demonstrated，and an explicit finite element simulation of test beams is carried out. The results show that an obvious and phenomenologically regular size fect of the shear strength of recycled concrete beams without web reinforcement，which can be beter simulated by the explicit finite element method.

Key words： structural engineering；static analysis；test；explicit finite element；recycled concrete （ReC）beam；shear strength；size effect

0引言

再生混凝土（recycledconcrete，ReC）[']是以废弃混凝土加工形成的块状物为粗骨料，与细骨料、水泥、水等拌和形成的无机黏合材料。（剩余12772字）