Results 171 to 180 of about 644 (222)

The cyclic performance of reinforced concrete columns using the lap‐spliced crosstie and lap‐spliced inner hoop

Structural Concrete, 2017
A lap‐spliced crosstie consists of two J‐shaped steel bars (rebars) that have a straight end and an end featuring a 180° hook. A lap‐spliced inner hoop is the lap splice of two U‐bars. In this study, cyclic load test was conducted on four large‐sized reinforced concrete (RC) columns to investigate the cyclic performance of RC columns comprising lap ...
Tai‐Kuang Lee, Cheng‐Cheng Chen, Kai‐Shen Zhan   +2 more
openaire   +2 more sources

State of Bond along Lap Splices

Journal of Structural Engineering, 2015
AbstractDesign requirements for development length of lap-spliced reinforcing bars in concrete refer to the associated rules for anchorage, practically treating the two problems as one. This was based on the empirical observation that development capacity of reinforcement obtained from both lap-splice and anchorage tests converge to the same ...
Tastani, S. P., Brokalaki, E., Pantazopoulou, Stavroula J., Tastani, S. P., Brokalaki, E., Pantazopoulou, Stavroula J.   +5 more
openaire   +2 more sources

Lapped Tensile Reinforcement Splices

Journal of the Structural Division, 1982
The bond action between concrete and deformed bars in lap splices is analysed in its different working stages. The principal tensile stress generated by bond stress cracks the concrete after which bond gives rise to splitting forces. These forces cause longitudinal cracking of the cover. A method for determination of this cracking load is proposed. The
openaire   +1 more source

Lap Splices in Confined Concrete

ACI Structural Journal, 1999
This paper presents an investigation of the behavior of spirally confined lap splices of deformed reinforcing bars in concrete. A total of 119 specimens were tested in axial tension in two phases. The first phase focused on determining the best splicing detail. In the second phase, the chosen splice detail was more extensively studied.
openaire   +1 more source

Evaluation of Bundled Bar Lap Splices

ACI Structural Journal, 2009
Building codes allow the use of bundled reinforcement in groups of up to four bars. Placing reinforcing bars in bundles can overcome some of the practical limitations of using single bars with larger diameters. This paper examines the behavior of tension lap splices of bundled bars in cracked concrete under flexural loads.
openaire   +1 more source

Bond Strength of Lap-Spliced Bars

ACI Structural Journal, 2005
The performance of reinforced concrete structures depends on adequate bond strength between concrete and reinforcing steel. This article reports on a study of the bond strength of lap-spliced bars. The authors note that calculation methods to evaluate the strength of tension lap splices are based primarily on nonlinear regression analysis of test ...
openaire   +1 more source

Lap Splices Anchored by Headed Bars

ACI Structural Journal, 2006
This research aimed to experimentally study the anchorage behavior of headed reinforcement in lap splices. Observations of cracking behavior, strain measurements of reinforcement, and strength are reported. The behavior of unconfined laps is compared to confined laps, and the behavior of nonheaded and headed bar laps are also compared. Bar stresses are
openaire   +1 more source

Lap Splicing of Deformed Reinforcing Bars

ACI Journal Proceedings, 1976
Tests are described which were carried out to establish an efficient experimental technique for evaluating critical lap length. The results indicate that it is possible to determine the critical lap length, which is just sufficient to develop yield stress in reinforcement, from a very few splice test results and a knowledge of the actual yield strength
openaire   +1 more source

Fundamental Analysis of RC lap Splices

SP-180: Bond and Development of Reinforcement - A Tribute to Dr. Peter Gergely, 1998
An analytical model is presented to evaluate the local bond-slip relationship in RC lap splices considering the influence of splitting cracks, friction between the concrete and rib face, microscopic fracture of concrete in front of rib face, flexural deformation of the cover concrete and stirrups.
openaire   +1 more source

The influence of percentage of bars lapped on performance of splices

Materials and Structures, 2014
Most design codes encourage the staggering of lapped splices in a section, such that a portion of the bars in the cross section remains continuous throughout the lap zone. A penalty on lap length may be imposed if all bars are lapped at one section. In the literature, however, almost all tested specimens have had all reinforcement lapped at the same ...
METELLI, Giovanni, Cairns, John, PLIZZARI, Giovanni   +2 more
openaire   +1 more source