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.

scholarly journals Use of Composite Materials in RC Shear Wall

2020 ◽  
Vol 8 (5) ◽  
pp. 3835-3839
Keyword(s):  
Reinforced Concrete ◽  
Composite Materials ◽  
Boundary Element ◽  
Tall Buildings ◽  
Shear Wall ◽  
Steel Fibers ◽  
Ductile Material ◽  
Steel Fibres ◽  
Displacement Capacity ◽  
Rc Shear Wall

Shear wall is the structural component provided in midrise and tall buildings to resist earthquake and wind forces. These walls are continuous from foundation to top of buildings. Many times the wall around lift and staircase shaft of a building is designed as a shear wall. Generally these are of reinforced concrete but may be of masonry, wood, steel etc. As these walls have to resist heavy lateral forces these are of heavy sections and have a dense reinforcement at lower part which results substantial amount of closely spaced transverse reinforcement causing reinforcement congestion in boundary element creating problem of construction and placing. Heavy reinforcement and large thickness is required at lower stage and in boundary element of these walls. Displacement capacity of RC structures is generally depends on the deformation capacity of the concrete. If large displacement capacity is to be attained, steel is provided in concrete to enhance concrete behavior, particularly compressive strain capacity. To achieve these goals and maintaining size of cross section in control, heavy reinforcement ratio is required to maintain which creates problem of reinforcement congestion. To overcome this problem of reinforcement congestion a small amount of ductile material like steel fibres may be added to concrete. Many researchers had tried to investigate the behavior of RC shear wall with different composites to improve its performance but very few had tried with concrete with steel fibres. Use of composite materials steel fibers in concrete found beneficial in many structural elements is tried in this research for shear wall. In this paper finite element analysis of shear wall model has been carried out to study and compare the behavior of normal concrete shear wall and steel fiber reinforced concrete shear wall with and without opening using ETABS software to know improvement in behaviour when subjected to lateral load by adding steel fibers in concrete.

Analysis of Multistoried RCC Building with Shear Wall and Outrigger using ETABS Software

2021 ◽  
Vol 9 (VI) ◽  
pp. 2808-2811
Author(s):  
Prof. Subodh Dhoke
Keyword(s):  
Reinforced Concrete ◽  
Load Capacity ◽  
Tall Buildings ◽  
Well Being ◽  
Shear Wall ◽  
Engineering Practice ◽  
Structural Element ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
The Impact

During earthquakes, a large number of buildings are destroyed due to the cause of lateral forces and increased load capacity in the structural element, and this is caused by winds, earthquakes and uneven settlement of cargo. The least damage and well-being a healthy level of construction is a necessary requirement for tall buildings. To reduce the impact of damage on all high structures, it may consist of basic insulation techniques and sliding walls, and so on. Buildings are used to increase design performance and limit damage to landslide walls. On tall buildings to prevent earthquake loads, reinforced concrete walls are used as supporting elements. Reinforced concrete structures are mainly implemented in engineering practice in different situations and different applications. Many researchers turn to the effectiveness of sliding walls with boundary conditions based on different types of reinforcement alignment. This document consists of modeling different models for the shear wall housing and the hood system.

The Time Dependent Reliability Analysis for the Deteriorated Reinforced Concrete Columns Using the Monte Carlo Simulation

2007 ◽  
Vol 345-346 ◽  
pp. 1385-1388
Author(s):  
Hee Kyu Kim ◽  
Young Kyun Hong ◽  
Jung Hyun Park
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
Strength Loss ◽  
Reinforced Concrete Columns ◽  
Structural Resistance ◽  
Current Maximum ◽  
Maximum Crack ◽  
Corrosion Initiation Time ◽  
Corrosion Of Steel ◽  
Story Building

his study was prosecuted to analyze a structural resistance degradation model for the existing column in the 3-story building to be remodeled. The probabilistic random variables in this study were dealt with an initial member strength, current maximum crack width, current density and diameter of reinforcement with elapsed time and corrosion initiation time, TDRA has been performed to calculate the reliability index, the failure probability, the degradation level according to the member strength loss in reinforced concrete columns due to corrosion of steel reinforcement.

Implementing the performance-based seismic design for new reinforced concrete structures: Comparison among ASCE/SEI 41, TBI, and LATBSDC

2021 ◽  
pp. 875529302098196
Author(s):  
Siamak Sattar ◽  
Anne Hulsey ◽  
Garrett Hagen ◽  
Farzad Naeim ◽  
Steven McCabe
Keyword(s):  
Reinforced Concrete ◽  
Los Angeles ◽  
Seismic Design ◽  
Common Ground ◽  
Seismic Analysis ◽  
Tall Buildings ◽  
The United States ◽  
Analysis And Design ◽  
Performance Based Seismic Design ◽  
New Buildings

Performance-based seismic design (PBSD) has been recognized as a framework for designing new buildings in the United States in recent years. Various guidelines and standards have been developed to codify and document the implementation of PBSD, including “ Seismic Evaluation and Retrofit of Existing Buildings” (ASCE 41-17), the Tall Buildings Initiative’s Guidelines for Performance-Based Seismic Design of Tall Buildings (TBI Guidelines), and the Los Angeles Tall Buildings Structural Design Council’s An Alternative Procedure for Seismic Analysis and Design of Tall Buildings Located in the Los Angeles Region (LATBSDC Procedure). The main goal of these documents is to regularize the implementation of PBSD for practicing engineers. These documents were developed independently with experts from varying backgrounds and organizations and consequently have differences in several degrees from basic intent to the details of the implementation. As the main objective of PBSD is to ensure a specified building performance, these documents would be expected to provide similar recommendations for achieving a given performance objective for new buildings. This article provides a detailed comparison among each document’s implementation of PBSD for reinforced concrete buildings, with the goal of highlighting the differences among these documents and identifying provisions in which the designed building may achieve varied performance depending on the chosen standard/guideline. This comparison can help committees developing these documents to be aware of their differences, investigate the sources of their divergence, and bring these documents closer to common ground in future cycles.

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