INVESTIGATION OF HEAD AND BED MORTAR REGION EFFECT IN MICRO SCALE MODELLING OF MASONRY WALLS

Yıl 2020, Cilt: 38 Sayı: 2, 741 - 756, 01.06.2021

Muhammet Karaton Kağan Çanakçı

Öz

In this study, the effectiveness on the micro-model analysis by finite element method of masonry walls of head and bed mortar region is investigated. 3 dimensional fixed smeared crack model is preferred for the nonlinear behavior of mortar and brick regions of the walls. Failure surface of William-Warnke model is used for cracking and crushing calculations. For numerical investigation, experimental results of the Eindhoven walls are selected. The base shear force-top displacement curve and the fracture zones obtained from the experimental results of these walls are used for the comparison of the numerical results. Mortar region in finite element model is discretized two different material as bed and head regions. The effects on the numerical solutions of the two different mortar material are evaluated with regard to different material strength and different shear stress transfer coefficients. The experimental and numerical results are compared in terms of maximum base shear force, threshold displacement values and the fracture zones. According to evidence obtained from numerical solutions, it is observed that closest results to experimental results are obtained for base shear force and threshold displacement. A ratio between tensile and compressive strength of the head and the bed mortar regions are proposed. Values for shear retention factors using in opening and closing cases of the cracking regions where occurred into the two mortar materials, are recommended

Anahtar Kelimeler

Eindhoven walls, micro modelling, fixed smeared crack model, shear retention factors, head and bed mortar regions

Kaynakça

• [1] Karaton M., Aksoy, H.S., Sayın, E. and Calayır, Y., (2017) Nonlinear seismic performance of a 12th century historical masonry bridge under different earthquake levels, Engineering Failure Analysis 79, 408-421.
• [2] Chaimoon, K., Attard, M.M., (2007), “Modeling of unreinforced masonry walls under shear and compression”, Engineering Structures, 29, 2056-2068.
• [3] Caporale, A., Parisi, F., Asprone, D., Luciano, R., Prota, A., (2013), “Micromechanical analysis of adobe masonry as two-component composite: Influence of bond and loading schemes”, Composite Structures, 112, 254–263.
• [4] Adam, J. M., Brencich A., Hughes, T.G. and Tony Jefferson, T., (2010) Micromodelling of eccentrically loaded brickwork: Study of masonry wallettes”, Engineering Structures 32(5), 1244-1251.
• [5] Mohyeddin, A., Goldsworthy, H.M. and Gad, E.F., (2013) FE modelling of RC frames with masonry infill panels under in-plane and out-of-plane loading, Engineering Structures 51, 73-87.
• [6] Nazir, S., and Dhanasekar, M., (2014), “A non-linear interface element model for thin layer high adhesive mortared masonry”, Computers and Structures 144, 23-39.
• [7] Calderón, S., Sandoval, C. and Arnau O., (2017) Shear response of partially-grouted reinforced masonry walls with a central opening: Testing and detailed micro-modelling, Material and Design 118, 122-137.
• [8] Petracca, M., Pelà, L., Rossi. R., Zaghi, S., Camata, G. and Spacone, E., (2017) Microscale continuous and discrete numerical models for nonlinear analysis of masonry shear walls”, Construction and Building Material, 149, 296-314.
• [9] D’Altri, A.M., Miranda, S., Castellazzi, G. and Sarhosis V., (2018) A 3D detailed micromodel for the in-plane and out-of-plane numerical analysis of masonry panels, Computers and Structures 206, 18–30.
• [10] Drougkas, A., Roca, P. and Molins, C., (2019) Experimental analysis and detailed micromodeling of masonry walls subjected to in-plane shear, Engineering Failure Analysis 95, 82-95.
• [11] William K.J. and Warnke., (1975) Constitutive Model for the Tri-axial Behaviour of Concrete, Proceeding of the International Association for Bridge and Structural Engineering, January, Bergamo, Italy.
• [12] Zeinkiewicz, O. C. and Taylor, R. L., (1991) Finite Element Method: Solid and Fluid Mechanics Dynamics and Non-Linearity, 4th Edition. McGraw-Hill, New York, NY, USA.
• [13] Swanson Analysis System, (2015), Ansys Version 16.
• [14] Vermeltfoort, A.Th. and Raijmakers, T.M.J., (1993) Deformation Controlled Tests in Masonry Shear Walls, Part 2 (in dutch), Report TUE/BKO/93.08. Eindhoven University of Technology, Eindhoven, Netherlands.
• [15] Hemant, B. K., Durgesh, C.R., Sudnir K. J., (2007), “Stress-Strain Characteristics of Clay Brick Masonry under Uniaxial Compression”, Journal of Materials in Civil Engineering 19(9), 728-739.