List of Articles Tube system

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  1 - Comparative Analysis of Energy Absorption Capacity of Single and Nested Metal Matrix Composite Tubes Under Quasi-Static Lateral and Axial Loading
  S Dehghanpour K Hosseini Safari F Barati M.M Attar
  10.22034/jsm.2020.1889852.1537
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  2 - Flow-Induced Instability Smart Control of Elastically Coupled Double-Nanotube-Systems
  V Atabakhshian A Ghorbanpour Arani A.R Shajari S Amir
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  3 - Comparison of exploitation criteria and acceleration of diagrid steel structures with tube system based on wind dynamic analysis
  mehdi hooshmand Hassan Haji Kazemi Seyed Alireza Zareei
  10.30495/civil.2023.1983329.1348
  Considering the widespread use of diagrid systems in high-rise buildings, it seems necessary to investigate the behavior of this structural system against the wind and control comfort criteria based on acceleration. The purpose of this research is to compare the comfort More

  Considering the widespread use of diagrid systems in high-rise buildings, it seems necessary to investigate the behavior of this structural system against the wind and control comfort criteria based on acceleration. The purpose of this research is to compare the comfort criterion based on acceleration in the diagrid system with the tube system. For this purpose, the effect of various parameters such as the acceleration of floors and base shear under dynamic wind load has been evaluated. It is expected that the performance of the diagonal network will be evaluated with a more detailed understanding of the diagonal network in tall structures and the evaluation of the performance and comfort criteria based on the acceleration against the wind load using the dynamic analysis of time history using Cholsky, ergodic and AP methods. Investigations show that the acceleration of the diagrid system floors, based on the ASCE7 wind dynamic response prediction equations, has exceeded the permissible limit of the ASCE 7 regulation of milli-g20. This article is due to the overestimation of ASCE 7 equations compared to the results of wind time history analysis. So, in the 50-story structure, the maximum acceleration of the roof obtained from the ASCE equation is 71.83 times the results of the dynamic analysis of wind time history, and in the 70-story structure, it is 2 times, and in the 100-story structure, it is 1.87 times the results of the dynamic analysis of the wind time history. Manuscript profile
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  4 - Spatial Analysis and Handling of High-rise Buildings from Reinforced Concrete Core Internal Resistant Pipe System under Dynamic Loads on the Tube
  Saeed Ghani Shayesteh Ashkan khodaBandehLou
  The construction of high-rise structures around the world is rapidly increasing and this trend has been accelerated following the rapid economic growth and expansion of cities and increasing demand for space in populated areas. As these skyscrapers reach higher heights, More

  The construction of high-rise structures around the world is rapidly increasing and this trend has been accelerated following the rapid economic growth and expansion of cities and increasing demand for space in populated areas. As these skyscrapers reach higher heights, they become a symbol of the power and superiority of technology advancement and economic development. Therefore, the use of new structural systems and modern construction technologies with the aim of reaching taller buildings considered by designers and engineers. In this study, a 26-story structure with 3-story underground with retaining walls is required to design against the lateral soil force of the surrounding area, that has a dual core system with tubular core modelled and dynamic analysis was performed under the influence of earthquake lateral force, and extent of lateral displacement of the structure and changes in force applied to its components were investigated in Sap2000 software. The tube in tube system indicated good performance against gravity and lateral forces and the maximum lateral displacement of the floors was within the permissible range due to the code and height of the structure concerned. Manuscript profile
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  5 - The Investigation of Resistant Reinforced Concrete Core in High-Rise Building of the Tube in Tube System with Stairs Box Against Earthquakes
  mohammad reza shadman khankandi ashkan khodabandehlou
  The design of structures against wind and earthquakes due to losses caused by these phenomena in different countries is very important. Designing of tall buildings should be have comprehensive and complete against the forces of wind and earthquake. Earthquake is one of More

  The design of structures against wind and earthquakes due to losses caused by these phenomena in different countries is very important. Designing of tall buildings should be have comprehensive and complete against the forces of wind and earthquake. Earthquake is one of the world's natural phenomena, so that in recent years the human losses during 1947 and 2005 have been announced about 550 thousand people worldwide. The main goal of this study is to investigate the behavior of resistant reinforced concrete core in high-rise building of the tube in tube system with stairs against earthquakes in building with 100 meters height and 25 floors under the influence of three Accelerogram Bam, Tapas and Northridge via SAP2000 software. Base shear, roof displacement and column axial force compared together. The results of the research showed that modeling stepping on the coordinates of the center of mass has not made a significant change, but rigidity center has mainly changed due to stiffness of stair slab. Also high-rise building's seismic response affected by the earthquake Accelerogram type Manuscript profile
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  6 - Investigating the Effect of Shear Walls Arrangement on Seismic Performance of High-rise Reinforced Concrete Buildings with Tube in Tube System
  Amir Esmailzad ashkan khodabandelou
  After use new materials for use in construction, the invention of various structural forms can be considered as the most important factor in the feasibility of the construction of high-rise structures. The structural form of the building system is a system that tolerate More

  After use new materials for use in construction, the invention of various structural forms can be considered as the most important factor in the feasibility of the construction of high-rise structures. The structural form of the building system is a system that tolerates the various combinations of horizontal and vertical loads. The structure is taller and thinner the structural factors of the degree are more important and subsequently the need to choose the structural form is further increased [1]. In this regard, recently, in the design of high-rise structures, a new idea, the tube in tube system, has been presented by Fazlorkhan and Milestone, which has been used in many of the world's tallest structures, including the Oil Standard Building in Chicago and the World Trade Center building in New York. Therefore, in this research, by modeling a concrete structure with a height of 108 m and 28 floors (a basement floor) and adding shear walls to this system and applying different layouts for them, by SAP2000, the seismic performance of the structure under 7 accelerates has been investigated and the base cutting and displacement force of the roof is compared under different modes. The results show that as the location of the shear walls moves from the center of the structure to the outer layer, the seismic response of the high-order structure with the tube in tube system will be improved and the sections can be reduced for the cost-effectiveness of the project. Manuscript profile
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  7 - Investigation of Shear Lag Phenomenon in High-Rise Reinforced Concrete Structures with Tube-in-Tube System under the Effect of Wind Load
  Kourosh Mehdizadeh Seyede Vahide Hashemi Abbasali Sadeghi
  The tube-in-tube system is one of the most practical structural forms in high-rise buildings. One of the most important disadvantages of this system is the shear lag phenomenon, which increases the axial force in the side columns and decreases the axial force of the mid More

  The tube-in-tube system is one of the most practical structural forms in high-rise buildings. One of the most important disadvantages of this system is the shear lag phenomenon, which increases the axial force in the side columns and decreases the axial force of the middle columns of the flange of structure. Therefore, in this study, the shear lag is investigated in high-rise reinforced concrete structures with tube-in-tube system with and without columns cut according to the height and plan under the effect of wind load. Thus, two high-rise concrete buildings, 40 and 60-story are modeled in ETABS 2017 software three dimensionally in three states. 40-story and 60-story prototypes are considered with and without columns cut in stories 11, 21 and 31, and then in stories 16, 31, and 46, respectively. Models were analyzed by wind force in order to calculate and compare the shear lag phenomenon. The results show that shear lag index has been changed from positive to negative phase at the height of building from the bottom to top and the axial force of the middle columns is higher than the corner columns in top stories. For example, the shear lag indices average is 1.2 and 0.61 in the 5th and 35th floors of 40-story building without column cut, respectively. Then the above values are 0.52 and 1.14 in the 5th and 55th floors, respectively for 60-story building without column cut. Also, the results indicate that the performance of structures has been improved at height by bundling of the columns in structures. Manuscript profile