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A Fateh, F Hejazi, M R Khojasteh

Seismic Performance Evaluation of Steel Shear Wall by Equivalent Truss Approach Modeling

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Series: w78:2014 (browse)
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Al-Tabtabai H, Alex A P, James R

Slab formwork design using genetic algorithm

Abstract: A method to design cost-optimum slab formwork components is proposed in this paper. Genetic Algorithms (GAs), a technique based on the principles of natural selection and evolution, is applied to solve the optimisation problem. GAs search from a population of possible solutions limited by a set of constraints. The cost of form components and labor involved, were considered for the formulation of the objective function of the optimisation problem. The bending moment, shear, maximum deflection, imposed ACI code provisions, etc., were used as constraints for the optimisation problem. Application of GA to the formwork design problem provides optimum design parameters such as the optimum cross section for form members, optimum spacing of form members, etc., while minimising the total cost. Formwork made either from wood, wood-metal composite or metal alone can be designed using the proposed technique. The paper presents the case of general formwork design, however, the method as a whole readily applies to the design of formwok for elevated slabs and high rise concrete elements.

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Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.economic (0.011489) class.analysis (0.007703) class.retrieve (0.007266)
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Permission to reproduce these papers has been graciously provided by the Research Press of the National Research Council of Canada. The support of the editors, particularly Dr. Dana Vanier, is gratefully appreciated.


Alekhin V,Antipin A,Gorodilov S,Khramtsov S

Numerical simulation of wind loads on high rise buildings

Abstract: Article presents a methodology of the numerical simulation of the wind on high-rise buildings, which was developed by the Department of Computer-aided design of structures of the Ural Federal University named after the first President of Russia B.N. Yeltsin. Paper includes the results of researches on development of a technique of determination of wind pressure upon high-rise buildings by means of numerical modeling in an ANSYS package. The investigation was carried out within the grant of the Russian Academy of Architecture and Building Sciences. The results are applied to calculation of wind pressure upon a number of high-rise buildings under construction in Yekaterinburg City (Russia). Simulation is performed in the program ANSYS. The simulated building is placed in a domain that is the numerical analogue of wind tunnel. Domain sizes are chosen in such a way that simulated buildings do not affect the flow of air on its boundaries. Shear stress transport (SST) turbulence model has been used. This model effectively combines the stability and accuracy to the standard k-? model in the areas, which are placed near the walls and the effectiveness of the k-e model at a distance from the walls with a smooth transition between them (input expansion functions). For the numerical solution of the governing equations the finite volume method was used (FVM). The scale of the turbulence is assumed to be 200-300m. Use of the developed technique is shown on the example of calculation of wind pressure and wind velocities in pedestrian area for high-rise building under construction in the City of Ekaterinburg.

Keywords: high-rise building,wind impact,simulation,wind loads

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Series: convr:2013 (browse)
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El sheikhy R A I

Crack path prediction using computer model fracture mechanics analysis

Abstract: A general approach of crack path technique during fracture process is developed according to " Directional Fracture approach " (DFA). This technique is presented for cracks under kth-mixzd mode tension-shear and compression-shear. It is applied for all directional fracture criteria [S , G , S, , Ge . x] . The hypothesis of this technique depend on the hypothesis of the used criterion , crack angle@), crack length (a), fracture increment length (r), and fracture angle@) . Computer programs using Quick Basic language are developed . Several examples of cracked specimens have been analysed covering the experimentally tested samples recording a good agreement.

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Series: ecce:1997 (browse)
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J. S. Kuang and Bartlomiej Jan Baczkowski

Shear Capacity Of Steel Fibre Reinforced Concrete Coupling Beams

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Series: w78:2006 (browse)
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Jack C.P. Cheng and Mohit Mangal

Automated Optimization of Steel Reinforcement in RC Building Frames Using BIM and Hybrid GA

Abstract: Design of steel reinforcement is an important and necessary task for designing reinforced concrete (RC) structures. Currently, steel reinforcement design is performed manually or semi-automatically using computer software such as ETABS, with reference to building codes. These methods are time consuming and sometimes error-prone. With the aid of advanced BIM technology, steel reinforcement design could be automated for fast, economical and error-free procedures.This paper presents a BIM-based framework for automated optimization of steel reinforcement in RC building frame using developed three-stage hybrid genetic algorithm (GA). Optimization includes selection and alignment of steel reinforcement in RC building frame for the minimum steel reinforcement area, including longitudinal and shear/confinement steel reinforcement. The first and second stages optimize the longitudinal reinforcement while the final stage optimizes the shear/confinement steel reinforcement incorporating design code (BS8110) and buildability constraints. A three-storey RC building frame is analysed to check the applicability of the developed optimization framework and its improvement over current design approaches. The results show that the developed optimization framework can minimize the steel reinforcement area quickly. Automated 2D view of RC elements is then created to visualize the optimized steel reinforcement results.

Keywords: Building Information Modelling, Optimization, Interoperability, Steel Reinforcement Design, RC Frame

DOI: https://doi.org/10.24928/JC3-2017/0226

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Kilar V, Krstulovič-Opara N

Seismic behavior of high-performance fiber reinforced composite frames

Abstract: The paper explores the possibilities to use a High-Performance Fiber Reinforced Concretes (HPFRCs) for design of seismic resistant cost-effective and durable buildings. Composite frame buildings are made through selective use of different HPFRCs: Slurry Infiltrated Mat Concrete (SIMCON), Slurry Infiltrated Fiber Concrete (SIFCON) and High Strength - Lightweight Aggregate Fiber Reinforced Concrete (HS-LWA FRC) which further minimizes dead and seismic loads. The first part of the paper briefly describes used HPFRCs and proposed composite building system consisted of composite columns, beams and specially designed fuses that connect the two. In the second part of the paper the results of the nonlinear static analysis of an isolated composite beam as well as of the nonlinear dynamic analysis of a whole four-story example composite building are presented. The response in terms of forcedisplacement relationships and rotational ductility factors as well as in terms of base shear, top displacements and global damage index histories is compared to the response of an identical classical four-story building made of reinforced concrete.

Keywords: fiber reinforced concrete, high performance fiber reinforced concrete, composite building structures, seismic behavior, frame structures, nonlinear analysis

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Series: itaec:2003 (browse)
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L Xie, X Lu, X Lu, Y Huang, L Ye

Multi-Layer Shell Element for Shear Walls in OpenSees

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Series: w78:2014 (browse)
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L-Y Xu, J-G Nie, J-S Fan

Experiment Investigation and Numerical Analysis on the Low-Yield-Point Steel Shear Panel Dampers

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M Zhou, J-G Nie, J-S Fan

Nonlinear Full-Process Shear Analysis of RC Structural Members Using Planar Membrane Element: Implementation and Application

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