Grouted sleeve connections used in precast reinforced concrete construction – Experimental investigation of a column-to-column joint. (15th November 2016)

• Record Type: Journal Article
• Authors: Tullini, Nerio; Minghini, Fabio
• Is Part Of: Engineering structures. Volume 127(2016:Nov. 15)
• Page Start: 784
• Page End: 803
• Publication Date: 2016-11-15
• Subjects: Precast concrete columns -- Column-to-column connection -- Grouted sleeve connection -- Static tests -- Cyclic tests; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2016.09.021
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A column-to-column grouted sleeve connection using lap splice of the steel bars is analyzed. The tension test shows bar failure outside the splice region. In bending tests with and without axial load failure is localized at the joint section. The design moment resistance of traditional RC members is exceeded. The shear test shows yielding of all bars crossing the joint section. Abstract: The results of an experimental campaign concerning full-scale tests on precast reinforced concrete column-to-column connections made with grouted sleeve splices are presented. The precast column units had a square cross-section with the side of 500 mm. Eight 20 mm-diameter bars protruding from one unit were grouted into corrugated steel sleeves encased in the other unit. The column-to-column connections were subjected to three monotonic tests (axial tension and four-point bending with and without axial compression) and to two cyclic tests (four-point bending and shear) . In the tension test failure took place far from the interface between the precast units and highlighted the effectiveness of the stress transfer along the splice region. In all other tests, damage developed at the interface between the two units. In the bending tests with and without axial compression significant over-strengths with respect to design resistances computed for equally-reinforced monolithic members were attained. Because of the reduced thickness of the interface between the precast units, the rotation that concentrated at the interface led to a moderate reduction of the global bending stiffness. In the shear test the pure shear capacity of the bars crossing the joint was achieved. The cyclic bending test showed a ductile and stable hysteretic behavior of the connection.