FINITE ELEMENT ANALYSIS OF INTERIOR SLAB-COLUMN CONNECTION REINFORCED WITH FRP BARS

Hamdy K. Shehab El-dein, Mohamed M. Husain, Youssef L. Zaki, Bahaa M. Gouda

Abstract


This paper describes the non-linear behavior of interior slab-column connection reinforced with fiber reinforced polymers (FRP) bars,under monotonically increasing vertical loads.The non-linear 3D finite element (FE) analysis program (ANSYS V13) [1] is used. A full scale interior slab column connection measuring 2500 x 2500 mm, simply supported over its perimeter line located at 250 mm from edges was subjected to th present analysis.Two types of FRP bars were used, namely glass fiber reinforced polymers (GFRP) and carbon fiber reinforced polymers (CFRP). The behavioris studied in comparison to reference models reinforced with conventional steel bars. A total of 35 interior slab-column connection models were constructed and tested up to failure. The studied parameters are; i) tension reinforcement ratios (0.48 to 1.74%); ii) compresion reinforcement ratios (0.16 to 0.41%); iii) concrete compressive strength (28 to 60 MPa); iv) column size to slab depth ratio, (c/d), and v) slab depth (150 to 350 mm). The accuracy of the proposed FE model was verified against test results obtained byDuludeel [2]. Finally, a proposedequation of punching shear resistance of slab reinforced with FRP barsis devised. The prediction of the proposed modified punching resistance equation is compared with current codes and other equations given in the literature , and is shown to be more accurate

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