Paper Compared to traditional cast-in-place concrete
structures, the precast Concrete structures are usually constructed
in a controlled environment , i.e. plants, and then assembled
through certain links at the construction site. The concrete precast
concrete structures can therefore have better concrete quality and
help to reduce labor costs and increase construction speed.
Because of these advantages, in recent years the precast concrete
structures have received much attention. This research work
therefore presents a reasonable procedure for designing a grouted
sleeve splice connection using a simple material such as standard
pipes with little workmanship which gives the design a good
advantage compared to just using selection tables for expensive
proprietary similar connection. Such splices' mechanical
behavior is a function of two essential mechanisms: bar-to-grout
bond behavior, and sleeve-to-grout bond behavior. To achieve the
purpose of this analysis work , three arrangements were
manufactured and checked under incremental axial tensile load
with an all-out number of 66 grouted splice sleeve specimens.
While experimental methods of investigation are extremely useful
in obtaining information about the grouted splice sleeve
connection behavior, the use of numerical models helps to develop
good comprehension of behavior at lower cost. Models of
non-linear finite-element analysis for grouted splice sleeve
connection were presented in this research. The research utilized
the commercial Finite Element modeling software (ANSYS) to
study the effects of some parameters that are important in the
bond behavior of the grouted splice sleeve connection and
compare the analytical results with the experimental results to
confirm the analytical model. The average efficiency of the finite
element models using ANSYS was 92.5%. Having the finite
element model validated, a parametric study was performed using
ANSYS to evaluate the effect of the following parameters on the
behavior of grouted splice sleeve: bar diameter, embedded length,
grout compressive strength, sleeve wall thickness, and sleeve inner
diameter
The shear friction capacity calculated using clauses 11.6.4 to 11.6.10 in ACI 318-14 or clauses 11.5.1 to 11.5.6 in CSA-A23.3-14 do not take into consideration the effect of edge distance on the shear friction capacity. The main objectives of this research are to study the effect of edge distance on the shear friction capacity by means of a specifically designed experimental program, to determine the minimum edge distance to develop the shear friction capacity, and to derive an expression for reduction of shear friction capacity for edge distances less than the minimum edge distance. The study involved testing eight specimens. In four specimens, a steel plate was anchored using welded reinforcing steel bars, and in the other four specimens the steel plate was anchored using headed concrete anchors (bolts) (HCA). The steel plates were tested under shear load at edge distances of 75, 150, 225, and 300 mm (3.0, 6.0, 9.0, and 12.0 in), for the two types of anchorage. The results were compared to design values according to ACI 318-14 and CAN/CSA-A23.3-14 standards. An equation is derived to compute the minimum edge distance after which the full shear friction capacity is developed. Another equation is derived to compute the proposed shear capacity for reinforcing bar anchors for edge distances less than the minimum edge distance.
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