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.

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.

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.

Collapsed Form Simulation of Styles of Different Structures under Earthquake Based on ANSYS/LS-DYNA

2011 ◽  
Vol 243-249 ◽  
pp. 6197-6201
Author(s):  
You Liang Fang ◽  
Bing Yin Gao ◽  
Jing Yao Duan
Keyword(s):  
Failure Mechanism ◽  
Seismic Waves ◽  
Steel Frame ◽  
Frame Structure ◽  
Frame Structures ◽  
Whole Process ◽  
Different Types ◽  
Steel Frame Structures ◽  
Earthquake Effects ◽  
Steel Frame Structure

In this paper, different types of steel frame structure under earthquake are adopted as the analyzed object of structural collapse. Seismic waves can be applyed into the structure in form of dynamic acceleration in ANSYS/LS-DYNA. The whole process of earthquake effects on the structure is simulated truly. It is helpful to realize and understand the failure mechanism and space mechanism of the different forms of steel frame structures. This paper can also provide a reference for reinforcement and maintenance of structure and a basis of anti-seism design of structure.

scholarly journals Analysis of second-order effects of constructions behaviour

2019 ◽  
Author(s):  
Raminta Venslavavičiūtė ◽  
Kęstutis Urbonas
Keyword(s):  
Steel Frame ◽  
Second Order ◽  
Frame Structure ◽  
Frame Structures ◽  
Order Effects ◽  
Rotational Stiffness ◽  
Frame Building ◽  
Steel Frame Structures ◽  
Second Order Effects ◽  
Rigid Joints

This paper presents the importance of the second-order effects in behaviour of steel frame structures. EN 1993-1-1 were distinguished three main methods: taking / without taking into account second order effects depending on the sensitivity of horizontal design effects and tolerance. Using these methods, the susceptibility of steel frame structures to second-order impacts is considered in accordance with EN 1993-1-1. The study was performed taking into account also the rotational stiffness of the joints of the frame structure. In this way, trying to determine the effect of the joint on the rotational rigidity makes the frame structure more sensitive to second order impacts. It is also considered a semi-rigid joints effects the general frame-tailed P-Δ and the second row stress. This establishes the link between the effects of the second-order and the semi-rigid joints in the overall (general) analysis. Frame-building sensitivity makes it possible to compare and measure the importance of such dependencies.

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.

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.

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.

Research on Judging Key Components for Collapse of Space Structures

2012 ◽  
Vol 166-169 ◽  
pp. 1459-1464
Author(s):  
Tie Cheng Wang ◽  
Jian Kang ◽  
Zhi Ping Li ◽  
Hai Long Zhao
Keyword(s):  
Energy Method ◽  
Progressive Collapse ◽  
Steel Frame ◽  
Frame Structure ◽  
Space Structures ◽  
Frame Structures ◽  
Space Frame ◽  
Importance Factor ◽  
Steel Frame Structures ◽  
Space Frame Structure

The key components of space steel frame structures which included 1-5 story respectively were judged by using energy method. It was shown in the results that besides interior and corner columns, adjacent side columns in low buildings should be paid attention to in analyzing progressive collapse. The approach of utilizing story as weight to modify importance factor of space frame structure was also proposed, and the modified importance factor complied better with collapse resistant characteristics of real buildings.

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