Ahmed Kamil Tanrikulu | Çukurova University (original) (raw)

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Papers by Ahmed Kamil Tanrikulu

Structural Engineering & Mechanics

In classical higher-order discontinuous boundary element formulation for two-dimensional elastost... more In classical higher-order discontinuous boundary element formulation for two-dimensional elastostatics, interpolation functions for different boundary variables (i.e., boundary displacements and tractions) are assumed to be the same. However, there is a derivational relationship between these variables. This paper presents a boundary element formulation, called Mixed Boundary Element Formulation, for two dimensional elastostatic problems in which above mentioned relationship is taking into account. The formulations are performed by using discontinuous first and second-order mixed boundary elements. Based on the formulations presented in this study, two computer softwares are developed and verified through some example problems. The results show that the present formulation is credible.

Structural Engineering & Mechanics

An iterative procedure for the analysis of reinforced concrete frames with beams in cracked state... more An iterative procedure for the analysis of reinforced concrete frames with beams in cracked state is presented. ACI and CEB model equations are used for the effective moment of inertia of the cracked members. In the analysis, shear deformations are taken into account and reduced shear stiffness is considered by using effective shear modulus models available in the literature. Based on the aforementioned procedure, a computer program has been developed. The results of the computer program have been compared with the experimental results available in the literature and found to be in good agreement. Finally, a parametric study is carried out on a two story reinforced concrete frame.

Composite Structures, Nov 15, 2015

This paper presents a numerical procedure to determine the deflection of concrete members reinfor... more This paper presents a numerical procedure to determine the deflection of concrete members reinforced with fiber reinforced polymer (FRP) or steel bars. This procedure is implemented into the stiffness matrix to allow for general use in the structural analysis. It considers effective flexibilities of members in the cracked state using either the curvature distribution along the member or available effective stiffness models under any loading or support condition. In general, structural concrete members can be considered to have three cracked regions (two at the ends and one at midspan) and two uncracked regions along their length. In this numerical procedure, the contributions of these regions to the member stiffness matrix are computed using a numerical integration technique. Using this procedure, a software program is developed which allows for the load–deflection behavior of a member reinforced with either FRP or steel bars and subjected to any loading or support condition to be rapidly determined. This calculation procedure is evaluated using available experimental data on the load–deflection behavior of simple and two-span beams reinforced with FRP and steel bars. Through comparison of the results, it is observed that the load–deflection behaviors calculated using the proposed approach utilizing the member moment–curvature response are consistent with the experimental data. This approach can provide a useful tool for the general calculation of deflection regardless of reinforcement type and can be used throughout the entire range of member behavior up to flexural failure.

Communications in Applied Numerical Methods, 1990

Journal of Sound and Vibration, 1992

ABSTRACT A new technique is proposed for developing refined element equations for structures for ... more ABSTRACT A new technique is proposed for developing refined element equations for structures for use in dynamic finite element analysis. The proposed technique makes it possible to eliminate the discrepancy which exists between element forces and the assumed deformation shape in conventional models. In the present study, the technique is applied to frame-type structures and the equations for a typical element of such structures are established. The technique is appraised by analyzing two sample dynamic problems by using the exact, new and conventional models and by comparing the results. It is found that the new model predicts the dynamic behavior of structures significantly better than the conventional models.