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5th International Conference on Technologies and Innovation (CITI)

作者： Hernandez-Hernandez, Mario Luis Hernandez-Hernandez, Jose Rodriguez Maldonado, Edilia Herrera Miranda, Israel Autonomous Univ Guerrero Engn Fac Chilpancingo Mexico TecNM Technol Inst Chilpancingo Chilpancingo Mexico Autonomous Univ Guerrero Govt & Publ Management Fac Chilpancingo Mexico

ISBN: (纸本)9783030349899;9783030349882

modern, high-performance computers are built with a combination of heterogeneous resources, including multi-core and many cores processors, large cache, fast memory, mesh communication between large processes bandwidth, as well as high support for Input/Output capabilities. In order to achieve the best hardware results it is necessary to design highly-performance parallel software with faster modern code that could take full advantage of the vast amount of resources of today's modern machines. code modernization encompasses a wide range of activities that aim to improve the performance of highly parallel software. code modernization is an issue that is being discussed more and more in the field of parallel software development. In this context, the experimentation with Stencil codes through a series of strategies for reorganizing code and algorithms, has shown to increase thread parallelism, vector/SIMD operations and compute intensity in modern architectures. For example, with the use of Stencil codes we have achieved a better performance in image edge detection by a factor of three faster than we could achieved with a standard processor.

关键词： modern code Stencil Edge detection KNL Image processing

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Experimental Seismic Performance Evaluation of Coupling Beams: Comparison of Old with modern codes

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JOURNAL OF EARTHQUAKE ENGINEERING 2021年第11期25卷 2269-2284页

作者： Honarparast, Sara Chaallal, Omar Univ Quebec Ecole Technol Super Dept Construct Engn Montreal PQ H3C 1K3 Canada

This study presents the results of an experimental investigation on the seismic performance of two reinforced concrete coupling beams (CBs) for coupled shear walls, one with a conventional reinforcement layout designed according to the old National Building code of Canada (NBCC) 1941 and the other one with a diagonal reinforcement configuration designed according to modern NBCC 2015 and Canadian Standard Association (CSA) A23.3 2014 requirements. Experimental tests were conducted to investigate the behavior of specimens under reversed cyclic loading. The experimental results reveal that the diagonal reinforcement configuration could increase the load-resisting capacity and energy dissipation capacity by 4.4 and 10.2 times, respectively. Moreover, the maximum rate of stiffness degradation decreased from 96% in conventionally reinforced CB to 57% in diagonally reinforced CBs. Furthermore, diagonal reinforcement layout led to more stable hysteretic behavior without considerable pinching. In contrast and as expected, the conventionally reinforced CB did not comply with the requirements of the new design code. Therefore, such CBs should be retrofitted to upgrade their seismic performance in conformity with updated standards requirements.

关键词： Reinforced concrete coupled shear wall coupling beam seismic performance cyclic loading test old code modern code

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Non-linear time history analysis of reinforced concrete coupled shear walls: Comparison of old design, modern design and retrofitted with externally bonded CFRP composites

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ENGINEERING STRUCTURES 2019年 185卷 353-365页

作者： Honarparast, Sara Chaallal, Omar Univ Quebec Ecole Technol Super Dept Construct Engn Montreal PQ H3C 1K3 Canada

When appropriately designed, coupled shear walls (CSWs) are very effective lateral load resisting systems for medium to high rise buildings. They reduce the deformation demands on the building and distribute the inelastic deformation between the coupling beams (CBs) and the wall piers. Their seismic performance depends mainly on the ability of their CBs to provide adequate stiffness and strength. Therefore, the design of the CBs and the walls at their base is of paramount importance. However, many existing buildings with CSWs feature unsatisfactory behaviour under lateral loading as they were designed and constructed according to old codes and standards with insufficient requirements for seismic design. Their seismic retrofit is therefore inevitable. Many conventional retrofit techniques have been attempted in the past to improve the seismic behavior of CSWs. Recently, an innovative technique using externally bonded fibre reinforced polymer (EB-FRP) composite to strengthen existing reinforced concrete (RC) structural elements has emerged. The current study focuses on two objectives related to CSWs: (i) evaluate the seismic performance of old designed CSWs and highlight their deficiencies by comparing its response with that of corresponding modern design CSWs;and (ii) evaluate the effectiveness of EB-Carbon FRP (EB-CFRP) retrofitting on the seismic response of deficient CSWs. To achieve these objectives, two 20-story CSWs located in Western seismic Canadian zone were considered. One CSW was designed according to old National Building code of Canada (NBCC) 1941 and the other one designed in conformity with modern NBCC 2015 and Canadian Standard Association (CSA) A23.3-14. The nonlinear time-history analyses of the two types of CSWs as well as the CFRP retrofitted one under simulated earthquake motions are carried out using RUAUMOKO program. The observed results confirmed the effectiveness of CFRP retrofitting in enhancing the seismic performance of deficient old CSWs

关键词： Reinforced concrete coupled shear wall Coupling beam Non-linear time history analysis CFRP retrofit method Seismic performance Old code modern code

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