Bond Behavior in Flexural Members: Numerical Studies
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International Journal of Steel Structures https://doi.org/10.1007/s13296-020-00432-3
Bond Behavior in Flexural Members: Numerical Studies Ankit Bhardwaj1 · Vasant Matsagar2 · A. K. Nagpal2 · Sandeep Chaudhary3 Received: 9 May 2020 / Accepted: 16 October 2020 © Korean Society of Steel Construction 2020
Abstract Adhesive bonding has recently emerged as an alternative to shear stud connection in steel–concrete composite flexural members. Research on adhesive-bonded steel–concrete composite flexural members is in a preliminary stage, and the behavior of the bond layer in these structures is not well understood yet. A three-dimensional finite element model is developed and used to conduct the parametric investigations. The developed model is validated with experimental results available in the literature. The behavior of the bond layer is defined in terms of normal stress, normal strain, shear stress, and shear strain. Seven different parameters are studied regarding their effect on the behavior of the bond layer. The parameters include load proportion factor, longitudinal distribution of load, transverse distribution of load, width of concrete slab, depth of the concrete slab, Young’s modulus of the adhesive and transverse location of the adhesive fiber. Parametric investigations are carried out to establish the relevance of parameters in terms of their effect on the behavior of the bond layer. The most significant parameters are identified as load proportion factor, longitudinal distribution of load, and Young’s modulus of adhesive. Keywords Composite beams · Bonded · Bond layer · Shear connection · Finite element analysis · Young’s modulus
1 Introduction The connection between steel and concrete plays an important role in determining the stiffness and strength of steel–concrete composite members. Such connection, referred to as shear connection, resists horizontal slip and vertical separation of steel and concrete components, and enables the steel and concrete components of the composite members to behave as a unit. Shear studs are most * Sandeep Chaudhary [email protected] Ankit Bhardwaj [email protected] Vasant Matsagar [email protected] A. K. Nagpal [email protected] 1
Department of Civil Engineering, Government Engineering College Bharatpur, Bharatpur 321303, India
2
Department of Civil Engineering, Indian Institute of Technology (IIT) Delhi, Hauz Khas, New Delhi 110016, India
3
Department of Civil Engineering, Indian Institute of Technology (IIT) Indore, Simrol, Indore 453552, India
popularly used for shear connection. However, shear studs cause stress concentration in the concrete and may exhibit significant slip, which results in partial interaction (Oehlers and Bradford 1995). Moreover, such construction often leads to shrinkage cracks in concrete (Lebet and Ducret 1998), as it mainly involves the in-situ casting of concrete. Composite structures have been investigated for several aspects, such as service load behavior (Chaudhary et al. 2008; Pendharkar et al. 201
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