scholarly journals Analysis of RC Framed Post Tensioned Slab Structure to Evaluate the Performance of Floating Column with and without Shear Wall using ETABS

2021 ◽  
Vol 9 (VI) ◽  
pp. 5279-5286
Author(s):  
Ranjana Raj
Keyword(s):  
Analytical Study ◽  
Load Transfer ◽  
Poor Performance ◽  
Ground Level ◽  
Shear Wall ◽  
Typical Feature ◽  
Transfer Path ◽  
Story Building ◽  
Path Deviation ◽  
Post Tensioned

This research aims to develop analytical study of post tensioned slab with floating column. In present scenario buildings with floating columns are of typical feature within the fashionable multi storey construction practices in urban India. Such sorts of constructions are highly undesirable in building inbuilt seismically active areas. For this buildings are given floating columns at one or more storey. These floating columns are highly disadvantageous during a building inbuilt seismically active area. The earthquake forces that are developed at different floor levels during a building got to be carried down along the peak to the bottom by the shortest path. Deviation or discontinuity during this load transfer path leads to poor performance of the building. In this paper, analytical study of post tensioned slab to evaluate the performance of floating column at ground level or at alternative story for G + 10 story building without shear wall, shear wall at corner, shear wall at center, shear wall at external middle and combined shear wall are provided for regular building is taken for study. The response of building like storey drift, storey displacement and storey shear has been wont to evaluate the results obtained using ETABS software.

scholarly journals A Comparative Analytical Study of Some External Finishing (Cladding) Material in Terms of Their Ability to Spread Fire in Multi-story Building Facades in Iraq

2020 ◽  
Vol 10 (5) ◽  
pp. 647-654
Author(s):  
Ahmed A. Alfakhry
Keyword(s):  
Computer Modeling ◽  
Analytical Study ◽  
Raw Materials ◽  
Fire Spread ◽  
Building Facades ◽  
The Difference ◽  
Fire Spreading ◽  
Story Building ◽  
Cladding Material ◽  
Main Factor

The traditional building in Iraq characterised by the using of a certain number of finishing's in external façades like cement plastering, limestone and perforated yellow brick because the raw materials of manufacturing are available locally. Fire spread through the facades is widely recognized as one of the fastest pathways of fire spreading in the buildings, so the appropriate choose of highly performance finishing material against fire will be potentially the main factor in controlling the fire and suppressed it. This study uses computer modeling and fire simulation technology of Pyrosim, FDS and smoke view to compare the difference between the performance of some traditional finishing materials like cement plastering, limestone and perforated yellow brick with the ACPs and their speed to transfer fire from floor to floor if used in multi storey buildings. The study highlighted that traditional finishing materials are more efficient than modern cladding materials and that the performance of ACP-PE is the worst among the materials examined by this study. Moreover, the cement plastering is the worst among the traditional local finishing materials.

scholarly journals Numerical Investigation and Design of Reinforced Concrete Shear Wall Equipped with Tuned Liquid Multiple Columns Dampers

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Zhe Wang ◽  
Liang Cao ◽  
Filippo Ubertini ◽  
Simon Laflamme
Keyword(s):  
Reinforced Concrete ◽  
Tall Buildings ◽  
Shear Wall ◽  
Distributed Applications ◽  
Geometric Constraints ◽  
Strength Model ◽  
Strength Performance ◽  
Design Considerations ◽  
Trade Offs ◽  
Story Building

The tuned liquid multiple column damper (TLMCD) is a variation of the tuned liquid column damper (TLCD) that includes multiple vertical columns. A new damping system that embeds TLMCDs within reinforced concrete shear wall systems, termed tuned liquid wall damper (TLWD), is proposed, augmenting the traditional structural component with energy dissipation capabilities. The objective of this study is to assess energy mitigation and strength trade-offs in designing TLWDs and demonstrating the promise of TLWD systems in tall buildings through vertically distributed applications. This is done by investigating the performance of the proposed TLWD through the finite element model (FEM) of a simplified representation of a 42-story building equipped with the multifunctional component. A strength model for the TLWD is developed to empower faster performance evaluation on more complex models. Results from the FEM are used to validate the strength model and show that the model could be used conservatively in assessing strength performance. Design considerations are discussed based on the simplified representation. In particular, to improve mitigation performance while maintaining strength, it is found that a single-layer arrangement of the vertical columns is preferred, while distributing the inertia among a higher number of smaller columns. The proposed TLWD is numerically evaluated on a more realistic system consisting of a multi-degrees-of-freedom representation of the 42-story building under stochastic wind excitation. Simulation results demonstrate that the TLWD, used in a vertically distributed configuration through the building, could be used to mitigate vibrations, outperforming a traditional TLCD system with geometric constraints under 20 design wind realization. Results from the numerical simulations also confirmed the design considerations established through the simplified representation.

Numerical investigation on load transfer mechanism of bonded post-tensioned concrete beam-column substructures against progressive collapse

2020 ◽  
pp. 136943322098165
Author(s):  
Kai Qian ◽  
Hai-Ning Hu ◽  
Yun-Hao Weng ◽  
Xiao-Fang Deng ◽  
Ting Huang
Keyword(s):  
Prestressed Concrete ◽  
Load Transfer ◽  
Numerical Models ◽  
Progressive Collapse ◽  
Load Resistance ◽  
Catenary Action ◽  
Parabolic Profile ◽  
Arch Action ◽  
Column Removal Scenario ◽  
Post Tensioned

This paper presents the high-fidelity finite-element-based numerical models for modeling the behavior of prestressed concrete (PC) beam-column substructures to resist progressive collapse under column removal scenario. After careful calibration against data, the validated numerical models are further employed to shed light on the influence of bonded post-tensioned tendons (BPT) with a parabolic profile on the load transfer mechanisms of PC frames against progressive collapse. The effects of parameters, including initial effective prestress, profile of tendon and lateral constraint stiffness at the beam ends, are also investigated. The study shows that, due to the presence of prestressed tendons, the mobilization of compressive arch action in the beam at small deflections demands stronger lateral constraints, and the ultimate load resistance of PC beam-column substructures depends on combined catenary action from non-prestressed reinforcement and BPT at large deflections. For a given constraint stiffness, the initial effective prestress of BPT has less significant effect on the overall structural behavior. For prestressed tendon, a straight profile usually employed in structural strengthening can improve the initial structural stiffness and yield strength, but is less effective in enhancing the ultimate resistance against progressive collapse than the parabolic profile.

Experimental Evaluation of a Multi-Story Post-Tensioned Coupled Shear Wall Structure

2013 ◽  
Author(s):  
Michael J. McGinnis ◽  
Steven Barbachyn ◽  
Michelle R. Holloman ◽  
Yahya C. Kurama
Keyword(s):  
Experimental Evaluation ◽  
Shear Wall ◽  
Wall Structure ◽  
Coupled Shear Wall ◽  
Post Tensioned

scholarly journals Punching Shear Stress in Post-Tensioned Transfer Plate of Multi-Story Buildings

2020 ◽  
Vol 10 (17) ◽  
pp. 6015
Author(s):  
Byeonguk Ahn ◽  
Thomas H.-K. Kang ◽  
Su-Min Kang ◽  
Jang Keun Yoon
Keyword(s):  
Shear Stress ◽  
Residential Building ◽  
Shear Walls ◽  
Cost Effective ◽  
Punching Shear ◽  
Complete Model ◽  
Potential Cost ◽  
Story Building ◽  
Building Plans ◽  
Post Tensioned

The design of a post-tensioned transfer plate is typically controlled by shear force—in particular, punching shear at the slab-column connection. To verify the accuracy of the separated model only for one floor currently used in the design of a post-tensioned transfer plate, results were compared to a complete model with multi-story building system for which two representative residential building plans were used to emulate physical structural systems. Punching shear stress for the separated model was calculated using the eccentric shear stress model presented in ACI 318. Punching shear stress was found to be overestimated in the separated model, given that interaction between transfer plates and upper shear walls cannot be reflected therein. Differences at column locations were also noted as the number of stories below the transfer floor increased. Consequently, the separated model is not recommended for design of post-tensioned transfer plates. A complete model is more suitable for more realistic and potential cost-effective design, through the inclusion of the interaction between transfer plates and upper shear walls.

Flexural behaviour of post-tensioned glass beams: Experimental and analytical study of three beam typologies

2021 ◽  
Vol 255 ◽  
pp. 112971
Author(s):  
Jagoda Cupać ◽  
Christian Louter ◽  
Alain Nussbaumer
Keyword(s):  
Analytical Study ◽  
Flexural Behaviour ◽  
Post Tensioned

Review of Loads Transfer Laws and their Applications in Artillery

2013 ◽  
Vol 328 ◽  
pp. 609-613
Author(s):  
Hui Xiao ◽  
Guo Lai Yang ◽  
Peng Wang
Keyword(s):  
Load Transfer ◽  
Impact Load ◽  
High Reliability ◽  
Lightweight Design ◽  
Strong Impact ◽  
Related Research ◽  
Vibration Load ◽  
Transfer Path ◽  
Technical Performance ◽  
Multi Body

In terms of the requirements of lightweight design, high reliability and long life for dynamic systems, especially heavy machinery and artillery, the methods to achieve the law of loads transfer path were studied based on some history and latest related research. So far, there is no systematic ways to research that in dynamic system, especially in artillery with instantaneous and strong impact load. This paper elaborated the application prospect of loads transfer law in artillery, discussed the main possible methods in research of artillery emission loads transfer laws. Those are topology optimization based on finite element, Multi-body dynamics, and method of vibration load transfer path analysis method. Through simulation and experiments those can be verified their correctness and effectiveness. This article is to find some feasible methods to achieve optimal load-carry structure, so as to improve its tactical and technical performance, especially the mobility, firing accuracy and shooting stability, and it has certain guiding or referenced significance for future related research.

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