SHEAR FRICTION OF REINFORCED CONCRETE MEMBERS IN SELF-COMPACTING CONCRETE

摘要：

The shear resistance of reinforced concrete members is provided by the shear reinforcement and by the shear capacity of the concrete itself. In cracked concrete the aggregate interlock (the interlock of aggregate particles from one side of the crack with the opposite face to resist shear displacements) defines the shear capacity of the concrete itself. The composition of self-compacting concrete (SCC) is different from conventional vibrated concrete (CVC). The amount of coarse aggregates is significantly lower and an SCC mixture has a larger amount of fine materials (e.g. Fillers). The change in grading of the aggregates could have a significant influence on the aggregate interlock of the material. To study this effect, push-off tests are carried out. Two self-compacting concretes and one CVC are studied. The shear plane of the push-off specimen is 150 x 300 mm or 150 × 200 mm and is reinforced with various diameters of steel bars resulting in reinforcement ratios ranging from 0.45 to 2.68％.It follows that the experimentally determined shear friction of self-compacting concrete is slightly higher than the shear friction of CVC. However the vertical displacement corresponding with the ultimate shear strength is larger.

作者: Pieter Desnerck Geert De Sehutter Lue Taerwe

作者单位: Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University

会议类型: 国际会议

会议名称: 第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC2009-China)

会议地点: 长沙

会议语种:英文

页码: 416-425

在线出版日期: 2009-06-05（万方平台首次上网日期，不代表论文的发表时间）