Abstract
This research work thus presents rational procedure to design a grouted sleeve splice connection using a basic material such as standard pipes with little workmanship this provides the design with a good advantage in comparison to just using selection tables for costly proprietary similar connection. The mechanical behavior of such splices is a function of two important mechanisms: the bar-to-grout bond behavior and the sleeve-to-grout bond behavior. To accomplish the goal of this examination work, three arrangements with an all-out number of 66 grouted splice sleeve specimens were fabricated and tested under incremental axial tensile load. The specimens were preliminary designed according to the equations available in the literature to determine the initial sleeve dimensions. Different parameters have been examined, namely: grout compressive strength, bar embedded length, bar diameter, sleeve inner diameter, sleeve wall thickness and sleeve configuration. The examined parameters provide to have a significant impact on the mechanical behavior of the grouted splices. Considering the results, it was clear that steel bars with 18 mm, 25 mm and 32 mm diameter and 044 Mpa yield stress can be adequately spliced and the tensile strength can be reached. The steel sleeve to the grouted splice sleeve connectors significantly improve the bar-to-grout bond strength through the confinement action added by the sleeve wall. Also welding interlocking steel rings can prevent the grout-to-sleeve bond Failure. Feasibility study for tested grouted sleeves reporting their adequacy in accordance with the code provisions of ACI 318-14[1] and ECP 203-2018[5] is presented. Moreover, design equations capturing the parameters affecting the bond strength, the confining pressure, and the required embedment length are derived.
Highlights
Precast concrete construction, as a rule, of the requires connecting precast concrete components, such as columns, wall panels, and pier caps, to make the completed structure whether it may be a building or bridge
The specimens were tested to investigate the mechanical behavior of the splices and the effect of the interacting parameters on the bond behavior
The results of the experimental work of this study showed that reinforcing steel bars with 18 mm, 25 mm, and 32 mm diameter can be adequately spliced using grouted splice sleeves fabricated from commercially available standard steel pipes and cementitious high strength non-shrink grouts
Summary
As a rule, of the requires connecting precast concrete components, such as columns, wall panels, and pier caps, to make the completed structure whether it may be a building or bridge. There are exceptionally few companies worldwide that can produce sleeve grouted splice pre- engineered and proprietary. The main idea of grouted splice sleeves depends on splicing two adjusted reinforcing steel bars by surrounding them with a high strength bonding material (grout) in a steel pipe as a mean of applying a confinement action to the grout to enhance the bond strength as shown in Fig.. Column to column connection on the right with grouted splice sleeve connectors
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Published Version
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