Time-Dependent Shear Transfer in Cracked Reinforced Concrete

摘要

The study begins with a literature survey reviewing recent experimental research efforts of shear transfer across a crack in concrete; the aggregate interlock and dowel action mechanisms are both treated for the monotonic loading case. Chapter 2 also deals with some theoretical models which describe the observations on an empirical or a phenomenological basis. Chapters 3 and 4 outline the set-up of an experimental program and include the most important test results, especially regarding the time-dependent displacement increases of the opposing crack faces due to an external sustained shear loading. Chapter 5 is concerned with modelling: the crack response is related to the time-dependent behavior of cement-based materials (creep) and of the embedded bars across the crack (bond). Chapter 6 addresses the application of the research for a two-dimensional cracked concrete panel subjected to sustained shear loading. Today, the engineering models have only been developed for monotonic loading conditions. The notation and a list of references are given in the last part of the study.