@article { author = {Kashefizadeh, Mohammad Hossein and Azimzadeh Koocheh, Mohammad and Amiri, Behtash and Esmaeilabadi, Reza}, title = {Steel Plate Shear Wall with Different Infill Steel Plates}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {1-14}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.118244.1011}, abstract = {The steel plate shear wall (SPSW) system is one of the most common and acceptable lateral-resisting structural systems for steel structures. Although the advantages of SPSW over the other structural systems are somehow well-known, the wall-farm interaction of the system is not comprehensively investigated. Therefore, the present study aims at investigating the interaction of the infill steel walls and the moment frames with RBS beams, using finite element method. For this purpose, different finite element model of SPSWs with various span lengths and infill steel plates are developed. The models have the low-yield, medium-yield, and high-strength infill steel plates. At first, eigenvalue buckling analysis is accomplished and those buckling mode shapes were used to introduce the initial imperfection for a realistic simulation. In the study, the important seismic parameters−including the lateral stiffness, the ultimate shear capacity, energy absorption, and ductility−are investigated using nonlinear pushover analysis.  Finite element results of the study indicate utilizing the low-yield steel plate affects inversely the contribution to the wall-frame interaction and reduces significantly the shear capacity of SPSWs. However, using high-strength structural steel plate enhances the shear capacity. Moreover, using infill steel plates with different properties does not change the initial elastic stiffness of the shear wall. Additionally, increasing the span length of steel plate shear wall, the ultimate shear strength and energy dissipation increase significantly, but the ductility of the system decreases.}, keywords = {steel plate shear wall,Finite element method,Nonlinear behavior,Pushover analysis}, url = {https://www.jcepm.com/article_62799.html}, eprint = {https://www.jcepm.com/article_62799_49cd144d2f178c6477045a7e025788a3.pdf} } @article { author = {Mahdi, Mofid and Marie, Iqbal}, title = {Three-Dimensional Modelling of Concrete Mix Structure for Numerical Stiffness Determination}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {15-27}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.118218.1010}, abstract = {A three dimensional (3-D) numerical model with explicit representation of two distinctive phases is used for precise prediction of the stiffness and Poisson’s ratio of concrete mixture, CM. Using ANSYS code, a 3-D macro scale numerical finite elements model was developed. The aggregates size, shape and distribution are created randomly using enclosing spheres. The sizes of spheres determine the nominal sizes of stone aggregates. Uniform simplified regular spherical stones aggregates are also considered for comparison purposes. The obtained results are compared with experimental and numerical models ones from the literature. The comparison shows a reliable and reasonable agreement. The results are found to be bounded by the upper and the lower bound of the mixtures rule. The results show a close agreement with Hobbs model as well. Therefore, the finite element model perform well under induced compression loading for predicting the stiffness and the Poisson’s ratio of the concrete mix.}, keywords = {Compression Stiffness,Macro-scale model,Concrete Mix,Ansys,Three-Dimensional FEM modelling}, url = {https://www.jcepm.com/article_64894.html}, eprint = {https://www.jcepm.com/article_64894_d16e9dccc28003bfd6e900733b892737.pdf} } @article { author = {Chawhan, Babu and Quadri, S.S.}, title = {Experimental and Numerical Investigations of Laterally Loaded Pile Group in Multilayered Cohesionless soil}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {28-45}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.108513.1005}, abstract = {This paper presents the results of experimental and numerical analysis of laterally loaded bamboo pipe piles embedded in multilayered cohesionless soil. An experimental investigation on model piles had been carried out using bamboo pipe pile with outer diameter of 24mm and inner diameter of 20mm in a multilayered cohesionless soil. In first case, a loose layer is maintained between the dense layers with H/D ratio of 0.50 and in second case, only dense sand layer of H/D ratio 0.0 is maintained with the depth of 0.0m. Where, H is the depth of middle soil layer and D is the embedment depth of pile of different slenderness (L/d) ratio of 25, 30 and 38. An experiment was carried out to study the behaviour of lateral load on bamboo pipe piles of different slenderness ratio of 25, 30 and 38. The experimental results of first case and second case show that the lateral load –lateral displacement response depends on the slenderness ratio of the piles. The experimental program was further verified by a two dimensional finite-element technique. The experimental results were compared with numerical analysis and are in a close agreement.}, keywords = {finite element analysis,Laterally loaded pile,lateral displacement,Lateral response,slenderness ratio}, url = {https://www.jcepm.com/article_82840.html}, eprint = {https://www.jcepm.com/article_82840_741f2cbe90689d7aa7df3a6245936b69.pdf} } @article { author = {Wang, L. and Wang, P.}, title = {Modeling of the New Boundary of Reaction Force Based on Particle Collision in the Smoothed Particle Hydrodynamics}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {46-66}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.141232.1037}, abstract = {A new reaction force model of particle collision is built, which is based on the conservation of momentum and the conservation of energy. Combined with weakly compressible smoothed particle hydrodynamics and the artificial compressibility, the new model and a conventional reaction force model of Lennard-Jones is used to simulate the phenomenon of shear driven cavity and the flow around a square cylinder, respectively. For verifying the accuracy of the new model, the DNS method is also used to simulate the flow phenomenon. By comparing and analyzing the calculating results, it can be concluded that: The new reaction force model can effectively prevent particles from unphysically penetrating through the boundary, and the variation of velocity and tangential stress near the boundary can be relatively accurate calculated. The new model helps to enhance the calculation accuracy of smooth particle hydrodynamics (SPH) for the whole flow field, and it has relatively good stability.}, keywords = {Smoothed particle hydrodynamic,boundary conditions,reaction force,particles collision}, url = {https://www.jcepm.com/article_82841.html}, eprint = {https://www.jcepm.com/article_82841_d181690227c879ae211dc1efa297f28c.pdf} } @article { author = {Ahani, Ali and Ahani, Elshan and Abbaszadeh, Hadi}, title = {The Effects of Outrigger Type and Distribution on Seismic Behavior of Super-Tall Building}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {67-78}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.125321.1016}, abstract = {Seismic performance and behavior of super-tall building is one of significant place of doubt while using energy dissipated outriggers. To enhance the seismic performance of super-tall building structures using outrigger is one common method; however, the performance and behavior of the outrigger varies based on the outrigger section and more importantly the elevation and multitude of outrigger in structure, that could cause great differences in seismic behavior of outrigger and the compressive force that is going to apply to mega columns. To evaluate the seismic performance of the building, a case study was carried out. The models was provided with two different outrigger and two different outrigger distribution and results was find out for each model to compare and present the best model that has the higher performance in whole building. The numerical models for the structures in different condition were established with the aid of ETABS software. The responses of the modeled buildings were obtained for TSC 2007 and TSC 2017 and compared. The results show that using outrigger at roof level could significantly affect the story displacement; however, it increases the periods at both X and Y directions.}, keywords = {Super-tall building,Outrigger system,seismic behavior,Numerical modeling}, url = {https://www.jcepm.com/article_82843.html}, eprint = {https://www.jcepm.com/article_82843_dab50bfd8c91a80cf3d9e2d37719e737.pdf} } @article { author = {Kiran, K.K. and Kori, Jagadish}, title = {Controlling Blast Loading of the Structural System by Cladding Material}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {79-99}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.141294.1038}, abstract = {Shelter is one of the main component of the living creature, it should be safe, uneconomical, hygenic and protective. Now a days shelter should be protective from blast load due to terrorist attack, nuclear explosive, chemical reactions occurring inside the building may be internal blast or external blast.A SDOF structural system subjected to blast load on Front wall, rear wall and roof is studied.The response of the structure is determined. The Pressure impulse curve is determined. Pressure impulse curve plays a vital role in determining the damage level of structure subjected to blast load.A LCS model is considered and studied. A LCS model made up of aluminium foam plays a vital role in the protection of structures subjected to blast load. A parameter of non dimensional parameters κ and τ are studied.A non dimensional parameters κ and τ plays a vital role in finding the damage level of the structure.}, keywords = {LCS,Blast load,Pressure impulse diagram,Non dimensional parameters κ and τ}, url = {https://www.jcepm.com/article_82849.html}, eprint = {https://www.jcepm.com/article_82849_f45d66c16002028d39346e8b7dd45829.pdf} } @article { author = {Azimi, Alla and Farahnaki, Reza}, title = {Flexural Capacity Prediction for Reinforced Concrete Beams by Group Method of Data Handling Approach}, journal = {Computational Engineering and Physical Modeling}, volume = {1}, number = {3}, pages = {100-110}, year = {2018}, publisher = {Pouyan Press}, issn = {2588-6959}, eissn = {2588-6959}, doi = {10.22115/cepm.2018.136502.1033}, abstract = {Application of group method of data handling (GMDH) to predict the capacity of reinforced concrete beams strengthened with CFRP laminate has been investigated in this paper. The proposed model considers nine parameters including concrete compressive strength, width of beam, effective depth, area of tension reinforcement, area of compression reinforcement, yield strength of steel, modulus of elasticity of steel, width of CFRP sheet, length of CFRP sheet. There are fourteen second order polynomials in three middle layers and an output layer. The coefficients of these polynomials are determined based on a collection of experimental laboratory tests, which were collected from the literature. In addition, 66 datasets were used to estimate unknown coefficients of the polynomials. To validate the model, 17 datasets were considered from the collected database. The results of the proposed GMDH showed that it can use as a predictive model for determining the ultimate flexural capacity of reinforced concrete beams strengthened with CFRP laminates.}, keywords = {Flexural capacity,reinforced concrete,FRP,GMDH}, url = {https://www.jcepm.com/article_82844.html}, eprint = {https://www.jcepm.com/article_82844_9553fc5a4dda5f54a30bef0c1d0cc3a7.pdf} }