Shaking Table Tests on a Passive Equipment Isolation System for Earthquake Protection

2009 ◽  
Author(s):  
Maurizio De Angelis ◽  
Salvatore Perno ◽  
Anna Reggio ◽  
Gerardo De Canio ◽  
Nicola Ranieri
Keyword(s):  
Steel Frame ◽  
Shaking Table ◽  
Frame Structure ◽  
Shaking Table Tests ◽  
Isolation System ◽  
Industrial Plants ◽  
Steel Frame Structures ◽  
Rigid Mass ◽  
Passive Isolation ◽  
Steel Frame Structure

The present work refers to steel frame structures in industrial plants. A passive isolation system for seismic protection of a considerable equipment, already present on a frame support structure and rigidly constrained to it, is investigated through both numerical simulations (1+1 DOF system) and shaking table tests on a 1:5 scale two-story steel frame structure. The equipment (e.g. a pipeline, a compressor unit, ...) is modelled as a rigid mass. The optimal design is determined by minimizing the dynamic response of the isolated mass. In order to ensure strenght and serviceability, the response of the frame is also monitored.

scholarly journals Optimization of concentrically braced steel frame structures based on SNI 1726:2019, SNI 1727:2020, SNI 1729:2020, and AISC 341-16

2021 ◽  
Vol 907 (1) ◽  
pp. 012010
Author(s):  
J Aloysius ◽  
J A Sumito ◽  
D Prayogo ◽  
H Santoso
Keyword(s):  
Steel Frame ◽  
Frame Structure ◽  
Frame Structures ◽  
Symbiotic Organisms Search ◽  
Safety Requirements ◽  
Concentrically Braced ◽  
Steel Frame Structures ◽  
Concentrically Braced Steel Frame ◽  
Symbiotic Organisms ◽  
Steel Frame Structure

Abstract Damages resulted from earthquakes are a loss in the economic sector. The structure of multi-story buildings needs an earthquake-proof design with higher performance to reduce such losses. By utilizing the metaheuristic algorithm, this study aims to identify the most compatible brace configuration and profile used in a concentrically braced steel frame structures with minimal total weight and that will meet the safety requirements. This algorithm is suitable owing to the fact that it is able to find solutions to any known optimization problem either through Particle Swarm Optimization (PSO), Symbiotic Organisms Search (SOS), or Differential Evolution (DE). The performance of these algorithms will demonstrated in a form of comparison through a case study of optimizing a 5-span, 6-story steel frame structure. These systems will determine the lightest frame weight, which also correlates to a lower construction cost, without compromising the constraints of SNI 1726:2019, SNI 1727:2020, SNI 1729:2020, and AISC 341-16. Based on the results of data processing, SOS is shown to achieve the highest algorithm performance compared to PSO and DE.

SHAKING TABLE TEST ON COLLAPSE BEHAVIOR OF SMALL-SCALE STEEL FRAME STRUCTURE

2007 ◽  
Vol 72 (620) ◽  
pp. 125-132 ◽  
Author(s):  
Yuko SHIMADA ◽  
Motoki AKAZAWA ◽  
Yosuke ITO ◽  
Yuichi MATSUOKA ◽  
Satoshi YAMADA ◽  
...  
Keyword(s):  
Shaking Table Test ◽  
Steel Frame ◽  
Shaking Table ◽  
Frame Structure ◽  
Small Scale ◽  
Collapse Behavior ◽  
Steel Frame Structure

Investigating the effect of infill walls on steel frame structures

2018 ◽  
Vol 4 (1) ◽  
pp. 27
Author(s):  
Osman Fatih Bayrak ◽  
Seda Yedek ◽  
Muhammet Musab Erdem ◽  
Murat Bikce
Keyword(s):  
Steel Frames ◽  
Steel Frame ◽  
Frame Structure ◽  
Frame Structures ◽  
Infill Walls ◽  
Soft Story ◽  
Deformation Properties ◽  
Steel Frame Structures ◽  
Aerated Concrete ◽  
Steel Frame Structure

Infill walls consisting of materials such as hollow concrete, hollow clay and autoclaved aerated concrete bricks are not only preferred in reinforced concrete buildings but also in steel frame structures. It is a well-known fact that infill walls limit the displacement of frames under horizontal loads. However, they may also bring about certain problems due to being placed randomly in horizontal and discontinuously in vertical directions for some architectural reasons. Moreover, cracks in frame-wall joints are observed in steel frame structures in which ductile behaving steel and brittle behaving infill walls are used together. In this study, the effect of infill walls on steel frames has been investigated. In the steel frame structure chosen for the study, four different situations consisting of different combinations of infill walls have been modeled by using ETABS Software. Later, the pushover analyses have been performed for all the models and their results have been compared. As a result of the analyses done by using the equivalent diagonal strut model, it has been found out that infill walls limit the displacement of steel frames and increase the performance of a structure. However, it has been also determined that in the steel frame structure in which the infill walls have been placed discontinuously in vertical and asymmetrically in horizontal, infill walls may lead to torsional and soft story irregularities. As a result, it is possible to observe cracks in the joints of infill walls and steel frame, the deformation properties of which differ, unless necessary precautions are taken.

Seismic Behavior Study of External Wall Panels in Steel Frames

2011 ◽  
Vol 243-249 ◽  
pp. 1425-1428 ◽  
Author(s):  
Ming Ji Fang
Keyword(s):  
Shaking Table Test ◽  
Dynamic Properties ◽  
Steel Frame ◽  
Shaking Table ◽  
Frame Structure ◽  
External Wall ◽  
Behavior Study ◽  
Wall Panels ◽  
Seismic Behaviors ◽  
Steel Frame Structure

The shaking table test of a full-scale steel frame structure with ALC external wall panels is performed in this paper. Based on the experimental results, the seismic behaviors of ALC external walls and joints are studied, such as the destruction properties of ALC external walls and joints and the effects of external walls on the dynamic properties of steel frame. Several useful conclusions and suggestions are presented in the paper.

Vibration Mitigation Effect of a Friction Damper with Variable Resistances on the Steel Frame Structure

2011 ◽  
Vol 255-260 ◽  
pp. 2560-2567
Author(s):  
Peng Bo Zhang ◽  
Yu Ping Sun ◽  
Shi Chun Zhao
Keyword(s):  
Frictional Resistance ◽  
Seismic Energy ◽  
Steel Frame ◽  
Frame Structure ◽  
Strong Wind ◽  
Friction Damper ◽  
Friction Dampers ◽  
Moderate Earthquake ◽  
Steel Frame Structures ◽  
Steel Frame Structure

Analytical study was conducted to investigate effect of friction dampers on vibration control of steel frame structures. The friction dampers installed in a ten-storey sample frame structure have two levels of fictional resistances. Unlike the conventional friction damper which has one frictional resistance, the friction dampers with variable resistances (VRFD) can apply two levels of frictional resistances, the lower resistance of which is attended to absorb the seismic energy by a moderate earthquake or a strong wind, and the higher one of which is expected to dissipate the seismic energy induced by a severe earthquake. The time-historey analytical results of the sample frame have indicated that the VRFD could not only mitigate the seismic response of the frame structure under a moderate earthquake more effectively than the conventional frictional damper, but also provide the same level of damping effect to the structure under severe earthquake as the conventional one.

Standardization Study of Assembly Floor Slab in Steel Frame Structure

2014 ◽  
Vol 638-640 ◽  
pp. 244-249
Author(s):  
Ya Bo Wang ◽  
Gao Feng Dou ◽  
Chuan Hao Xi ◽  
Lei Qian ◽  
Han Ting Liu
Keyword(s):  
Steel Frame ◽  
Frame Structure ◽  
Frame Structures ◽  
Floor Slab ◽  
Steel Frame Structures ◽  
Assembly Floor ◽  
Steel Frame Structure ◽  
At Home

The types of assembly floor slab member and the present development situation of assembly floor slab standardization at home and abroad is presented in the article, as well as assembly floor slab layout schemes and its advantage and disadvantage is presented, and the assembly floor slab standardization scheme is proposed to promote the application of assembly floor slab in steel frame structures.

scholarly journals Experimental Research on Passive Control of Steel Frame Structure Using SMA Wires

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Shi Yan ◽  
Jian Niu ◽  
Peng Mao ◽  
Gangbing Song ◽  
Wei Wang
Keyword(s):  
Passive Control ◽  
Shaking Table Test ◽  
Steel Frame ◽  
Shaking Table ◽  
Dynamic Responses ◽  
Frame Structure ◽  
Seismic Load ◽  
Control Effect ◽  
Maximum Displacement ◽  
Steel Frame Structure

Mechanical properties of shape memory alloy (SMA) wires were experimentally researched in this paper, and an energy dissipater made of SMA wire cable was designed and applied in a steel frame structure model by using superelasticity characteristics of SMAs to passively reduce dynamic responses of the steel frame structure under seismic load. For the characteristics of large relative displacements between the stories of the steel frame structure on both diagonal ends and the consideration of initial prestrain effects of the SMA cables, three kinds of the whole control, the part control, and no control of the shaking table tests and numerical simulations were carried, respectively. Through the results of the shaking table test and numerical simulation analysis, the dynamic responses such as the maximum displacement, velocity, and acceleration at the top layer of the steel frame structure applied with SMA cables are significantly decreased compared with the no control case. However, considering the premise of both effectiveness and efficiency, the part control effect is superior to the whole control. In many cases, it can meet the control requirement of reducing the maximum displacement and acceleration, while the superelasticity of SMAs can be sufficiently played, realizing the passive control purposes of the steel frame structure based on the energy dispassion through the application of the SMA cables. The proposed method has broad application prospects in the passive control field of building structures.

The Optimization Design of the Explosion-Proof Steel Frame Structure Considering the Material Plastic

2011 ◽  
Vol 243-249 ◽  
pp. 160-164
Author(s):  
Ya Ting Zang ◽  
Yong Sheng Zhang
Keyword(s):  
Optimization Design ◽  
Steel Structure ◽  
Construction Cost ◽  
Structure Design ◽  
Steel Frame ◽  
Frame Structure ◽  
Design Codes ◽  
Steel Frame Structures ◽  
Explosion Load ◽  
Steel Frame Structure

Taking the structure construction cost as the optimized goal, the optimization design is carried on the steel frame structure considering the material plastic, under the explosion load. According to the prevailing steel structure design codes GB50017-2002, the model of steel frame structures is established. The results show that the theory and calculation method is reasonable, which will have a guide in the future.

A New Measure to Reduce the Potential for Progressive Collapse of Steel Frame Structure

2012 ◽  
Vol 256-259 ◽  
pp. 905-910
Author(s):  
Chuan Qing Liu ◽  
Zuo Yun Mei ◽  
Xue Guang Gao
Keyword(s):  
Progressive Collapse ◽  
Vertical Displacement ◽  
Steel Frame ◽  
Frame Structure ◽  
Plastic Hinges ◽  
Column Removal ◽  
Steel Frame Structures ◽  
The Moment ◽  
Bracing System ◽  
Steel Frame Structure

In order to improve the capacity of resistance to progressive collapse for steel frame structures, a new measure, which uses bracing systems to help damaged frame to bridge across the local damage caused by abnormal loads, is presented in this study. The dynamic progressive collapse analysis is carried out to investigate the effect of resistance to progressive collapse in two different cases of column removal. Analytical results show that bracing systems on the top of steel frame structure have obvious effects on collapse prevention. Comparison with the unbraced steel frame structure, fixing bracing system could decrease the vertical displacement of the node corresponding to the top of the removed columns, and reduce the moment peak value at the end section of beams. And after column removal, plastic hinges come into being in the unbraced steel frame, on the other hand, there are no plastic hinges formed in the steel frame with bracing system.

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