Flexural behavior of ungrouted post-tensioned concrete masonry beams with unbonded barsRevista : Construction and Building Materials
Tipo de publicación : ISI Ir a publicación
Precast and post-tensioned systems increase the efﬁciency of masonry beams in terms of labor and time of construction. This study is aimed at evaluating the ﬂexural behavior of ungrouted post-tensioned concrete masonry beams, with eccentric bars, and the effect of the main design parameters on their structural performance when subjected to monotonic and unidirectional cyclic loading until failure. All beams failed in ﬂexure by crushing of the masonry in the compression region. Masonry strength was the design parameter that had the most signiﬁcant effect on the load-deﬂection behavior of posttensioned masonry beams. The test results showed that the measured nonlinear load-deﬂection behavior and the correlation between bar stress increase and midspan deﬂection can be estimated using a multi46linear relationship. Beams tested under monotonic and unidirectional cyclic loading exhibited comparable load-deﬂection envelope response.