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原文传递 Push-Off Tests in the Study of Cyclic Behavior of Interfaces between Concretes Cast at Different Times

题名：	Push-Off Tests in the Study of Cyclic Behavior of Interfaces between Concretes Cast at Different Times
正文语种：	英文
作者：	Diogo Figueira;Carlos Sousa;Rui Calcada;Afonso Serra Neves
作者单位：	Univ, of Porto
关键词：	Experimentation; Concrete; Joints; Cyclic loads; Shear strength; Concrete and masonry structures
摘要：	The knowledge about the cyclic behavior and effects of fatigue on interfaces between concrete cast at different times, subjected to shear stress, is still very limited. This aspect is particularly relevant in structures subjected to important cyclic loads, such as railway bridges. In this context, first, a brief state of the art on the monotonic and cyclic behavior of interfaces between concretes cast at different times is presented. Then, the test campaign, which was aimed at obtaining experimental support for modeling the behavior of such in terfaces, subjected to a high number of load cycles, is described, and the corresponding results are discussed and analyzed in terms of slip and crack opening, stress variations in the monotonic tests, failure mode, and number of resisting load cycles. It was further observed that the number of resisting load cycles increases as the maximum load level decreases. On the basis of this evidence, an experimental S-N curve was set for this type of interface. DOI: 10.106l/(ASCE)ST.1943-541X.0001364. © 2015 American Society of Civil Engineers.
出版日期：	2016.01
出版年：	2016
期刊名称：	Journal of Structural Engineering
卷：	Vol.142
期：	NO.01
页码：	04015101