详情

原文传递 Lateral Strain-to-Axial Strain Relationship of Confined Concrete

题名：	Lateral Strain-to-Axial Strain Relationship of Confined Concrete
其他题名：	Albanesi,T.,Nuti,C.,and Vanzi,I.(2007)."Closed form constitutive relationship for concrete filled FRP tubes under compression."Constr.Build.Mater.,21(2),409–427.
正文语种：	英文
作者：	Jian C. Lim
关键词：	Concrete;Fiber-reinforced polymer (FRP);Confinement;Dilation;Lateral strain;Axial strain;Stress-strain models;Concrete and masonry structures
摘要：	The use of fiber-reinforced polymers (FRP) has become widely accepted engineering practice for strengthening reinforced concrete members. It is well established that lateral confinement of concrete with FRP composites can significantly enhance its strength and ductility. As the confinement pressure generated by FRP on the confined concrete depends on the lateral expansion of concrete, the mechanism of concrete expansion inside the FRP shell is of significant interest. A review of the existing stress-strain models of FRP-confined concrete revealed the need for a model that accurately predicts the dilation characteristic of confined concrete as it provides the essential link between the response of the concrete core and the passive confinement mechanism of the FRP shell. It is also understood that knowledge established from the research area of actively confined concrete can be employed in the development of a model applicable for both FRPconfined and actively confined concretes. Based on a large number of experimental test results of both FRP-confined and actively confined concretes, a generic model is proposed to describe the lateral strain-to-axial strain relationship of confined concrete. The instrumentation arrangements of the tested specimens have allowed for the lateral strain-axial strain relationships of confined concrete to be captured throughout the tests. The trend of the lateral strain-to-axial strain relationship of confined concrete is shown to be a function of the confining pressure, type of confining material and concrete strength. Assessment of models with the experimental databases showed that the predictions of the proposed model are well above existing models and in good agreement with the test results of both FRP-confined and actively confined concretes.
出版年：	2015
论文唯一标识：	P-26Y2015V141N05011
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)ST.1943-541X.0001094
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	141
期：	05
页码：	93-110