Dynamic Response of Damped Outrigger System for Frame-Core Tube Structure under Earthquake Loads

2011 ◽  
Vol 243-249 ◽  
pp. 1203-1209 ◽  
Author(s):  
Ze Yao Xu ◽  
Qian Lin ◽  
Jian Lin Zhang
Keyword(s):  
Shear Stiffness ◽  
Damping Force ◽  
Core Tube ◽  
Earthquake Loads ◽  
Tube Cross Section ◽  
Fluid Viscous Dampers ◽  
The Core ◽  
Story Drift ◽  
Energy Dissipation System ◽  
Tube Structure

The novel passive energy dissipation system named Damped Outrigger System for frame-core tube structure is introduced in recent years, in which the outrigger and perimeter columns are separate, and the vertically acting fluid-viscous dampers connect the end of each of the outrigger walls to the adjacent perimeter column. In this paper, a new simplified model of this structure is studied by considering the damping force and shear stiffness of the core tube and lateral stiffness of the frame with finite element method. The shear correction factor is also employed to consider the shape of the core tube cross section. The numerical example shows that the displacement and the inter-story drift of the structure are reduced effectively under earthquake loads. It means that the damped outrigger is an innovative solution to resisting earthquake loads for frame-core tube structure.

A realistic model for transverse shear stiffness prediction of composite corrugated-core sandwich structure with bonding effect

2021 ◽  
pp. 109963622199386
Author(s):  
Tianshu Wang ◽  
Licheng Guo
Keyword(s):  
Present Model ◽  
Shear Stiffness ◽  
Realistic Model ◽  
Torsional Stiffness ◽  
Fem Model ◽  
The Core ◽  
Bonding Effect ◽  
Stiffness Model ◽  
Bonding Area ◽  
The Relationship

In this paper, a shear stiffness model for corrugated-core sandwich structures is proposed. The bonding area is discussed independently. The core is thought to be hinged on the skins with torsional stiffness. The analytical model was verified by FEM solution. Compared with the previous studies, the new model can predict the valley point of the shear stiffness at which the relationship between the shear stiffness and the angle of the core changes from negative correlation to positive correlation. The valley point increases when the core becomes stronger. For the structure with a angle of the core smaller than counterpart for the valley point, the existing analytical formulations may significantly underestimate the shear stiffness of the structure with strong skins. The results obtained by some previous models may be only 10 persent of that of the present model, which is supported by the FEM model.

scholarly journals ANALISIS GAYA GEMPA PADA BANGUNAN RUMAH TINGGAL DI WILAYAH GEMPA TINGGI

2018 ◽  
Vol 7 (2) ◽  
pp. 57-64
Author(s):  
Alfian Wiranata Zebua
Keyword(s):  
Structural Analysis ◽  
Shear Force ◽  
Structure Model ◽  
Dynamic Shear ◽  
Earthquake Loads ◽  
Story Drift ◽  
Loads Analysis ◽  
Support Reactions ◽  
Static Shear

Abstract : Four stories building was used as structure model. Static earthquake loads distribution were determined according to SNI 1726:2012. The effect of dynamic earthquake loads also considered. The result of structural analysis determined using ETABS. It were static shear force 1.082,64 KN and dynamic shear force, Fx = 1.057 KN and Fy = 983,5 KN. Colomn and beam forces were also determined. Support reactions and joint displacements were determined through structural analysis. Mass modal participation has been reached over 90% at mode 5. Story drift was still smaller than the allowable story drift.Keywords : earthquake loads analysis, residential building.Abstrak:Model struktur yang dianalisis yaitu gedung beraturan lantai 4 untuk rumah tinggal. Distribusi beban gempa statik diperoleh sesuai dengan SNI 1726:2012. Pengaruh beban gempa dinamik juga diperhitungkan. Hasil analisis struktur diperoleh antara lain besaran gaya geser statik 1.082,64 KN dan gaya geser dinamik, Fx = 1.057 KN dan Fy = 983,5 KN. Besaran gaya elemen kolom dan balok juga diperoleh. Reaksi tumpuan serta perpindahan titik buhul dapat diketahui dari hasil analisis yang dilakukan. Pada mode 5, partisipasi massa model yang dianalisis sudah mencapai 90%.Simpangan antar lantai yang terjadi pada model struktur tidak melebihi simpangan yang diijinkan.Kata kunci : analisis gaya gempa, bangunan rumah tinggal.

Comparison of Mechanical Properties between Grid Frame Core-Tube Structure and Tube Structure

2012 ◽  
Vol 446-449 ◽  
pp. 771-774
Author(s):  
Qi Ming Wang ◽  
Ke Jian Ma ◽  
Zhi Hua Chen ◽  
Tao Sun
Keyword(s):  
Mechanical Properties ◽  
Core Tube ◽  
Tube Structure

scholarly journals Designing a Cartridge Winder with Electronic Control

2014 ◽  
Vol 9 (2) ◽  
pp. 155892501400900 ◽  
Author(s):  
Pragnya Sanjiv Kanade ◽  
Someshwar S. Bhattacharya
Keyword(s):  
Laboratory Model ◽  
Electronic Control ◽  
Core Tube ◽  
Feed Material ◽  
The Core ◽  
Dyeing Process ◽  
Recent Trends ◽  
Precision System ◽  
A Chain ◽  
Filter Cartridge

There are number of winding machines in the market based on either the Random, Precision, or Step Precision winding system. Filtration application requires a uniform lay of yarn or its performance may be affected, hence, for the aforesaid purpose, the precision system would be more apt. Recent trends show an increased use of electronics in all applications, textiles being no exception. The aim of the present work was to develop a filter cartridge winder (laboratory model) based on the precision winding system, controlled electronically. The novelty of this machine lies in the fact that it makes use of a chain to reciprocate the guide mounted on it, unlike the majority of commercial filter winders, which make use of scroll cams to traverse the yarn. Filter winders are specialized winders that produce cartridges in standard sizes of 10”, 20”, 30″ and up to 70”. Thus a cartridge winder is quite different from the usual winding machines not only in terms of its traverse length and feed material but also because of the core tube which has to be perforated just as one required for a dyeing process.

Experimental study on seismic control of towers in cable-supported bridges by incorporating fluid viscous dampers between sub-towers

2020 ◽  
Vol 23 (10) ◽  
pp. 2086-2096
Author(s):  
Peng Zhou ◽  
Min Liu ◽  
Suchao Li ◽  
Hui Li ◽  
Gangbing Song
Keyword(s):  
Control Strategies ◽  
Experimental Tests ◽  
Shaking Table ◽  
Viscous Dampers ◽  
Damping Force ◽  
Alternative Scheme ◽  
Seismic Control ◽  
Fluid Viscous Dampers ◽  
Seismic Loadings ◽  
Energy Dissipation Devices

In this article, the seismic control of towers incorporated with fluid viscous dampers between sub-towers is investigated experimentally. To replace one entire tower, an alternative scheme consisting of four separate sub-towers is first proposed. Fluid viscous dampers are utilized as energy dissipation devices to be installed between sub-towers. Experimental tests are conducted to study the damping force characteristics. Three control strategies with various distributions of these dampers between sub-towers are developed. Then, a series of shaking table tests are carried out to evaluate the control performance of the proposed control strategies. Different earthquake records are adopted as seismic loadings. Experimental results clearly show a remarkable reduction in the towers seismic responses, including the accelerations, relative displacements, and strains. Rather than attaching dampers in concentrated ways, the strategy of distributing dampers uniformly behaves better.

Research on Mass Concrete Construction Techonogy of Raft Foundation of Hongyun Building

2013 ◽  
Vol 690-693 ◽  
pp. 709-713 ◽  
Author(s):  
Su Hua Yin ◽  
Yuan Huang ◽  
Ying Hui Yuan
Keyword(s):  
Temperature Control ◽  
Mass Concrete ◽  
Construction Technology ◽  
Concrete Construction ◽  
Core Tube ◽  
The Core ◽  
Raft Foundation ◽  
Concrete Base

The foundation of A tower of Hongyun building is made of raft board foundation which is 4200mm in the thickness and 3500mm beside side of the core tube. It is researched that the raft foundation mass concrete construction technology is expatiated from temperature and cracks of the raft foundation and the temperature control and monitoring of the concrete base slab construction and concrete curing.

Free Vibration Analysis of Frame-Core Tube Structures Attached with Damped Outriggers

2012 ◽  
Vol 238 ◽  
pp. 648-651
Author(s):  
Zhi Hao Wang
Keyword(s):  
Damping Ratio ◽  
Free Vibration Analysis ◽  
Structural System ◽  
Viscous Dampers ◽  
Core Tube ◽  
Modal Damping Ratio ◽  
Modal Damping ◽  
New Energy ◽  
Energy Dissipation System ◽  
Simplified Calculation

The classical outrigger in frame-core tube structure cantilevering from the core tube or shear wall connected to the perimeter columns directly, which can effectively improve the lateral stiffness of the structure. A new energy-dissipation system for such structural system is studied, where the outrigger and perimeter columns are separate and vertical viscous dampers are equipped between the outrigger and perimeter columns to make full use of the relative big displacement of two components. The effectiveness of proposed system is evaluated by means of the modal damping ratio based on the proposed simplified model. The mathematic models of the structural system are obtained with both the assumed mode shape method and finite element method according to the simplified calculation diagram. Based on the modal damping ratio, the optimal damping coefficients of linear viscous dampers are determined, and effectiveness of proposed system is confirmed.

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