ANALYSIS AND DESIGN OF MULTI-STOREY STEEL STRUCTURES ACCORDING TO DIFFERENT METHODS IN 2018 EARTHQUAKE REGULATIONS

2021 ◽  
Vol 0 (15) ◽  
pp. 0-0
Author(s):  
Fahım Ahmad NOWBAHARI ◽  
Elif AĞCAKOCA
Keyword(s):  
Steel Structure ◽  
Steel Structures ◽  
Horizontal Displacement ◽  
Combination Method ◽  
Seismic Load ◽  
Earthquake Loads ◽  
Analysis And Design ◽  
Earthquake Load ◽  
Earthquake Faults ◽  
Earthquake Zone

Earthquake loads are the biggest obstacle to the design of multi-storey and irregular structures in countries located in the earthquake zone and with active earthquake faults. It is a dangerous natural disaster that can result in loss of life and property depending on the intensity of the earthquake. It is important to use comprehensive and up-to-date standards and regulations for the calculation of earthquake loads. In this study, considering TBDY-2018, dynamic behavior of multi-storey steel structure with irregularity called A1 Torsional Irregularity has been investigated. For seismic load calculations, mode combination method and equivalent earthquake load method, which are linear analysis methods, were used. In a 10-storey steel structure, central inverted V braces were used and the positions of these braces were changed and a total of 4 models were produced. Structural analyzes were made using the "Etabs" program. Then, the results obtained in the two methods used were compared, and in the structural analysis of the models used, it was seen that the internal forces and displacements gave greater results when the calculations were made with the Equivalent Earthquake Load Method. In addition, it has been stated that the torsional irregularity coefficient of the structure is effective in the horizontal displacement of the structure.

ANALYSIS AND DESIGN OF MULTI-STOREY STEEL STRUCTURES WITH IRRIGATION TO TORQUE ACCORDING TO 2018 EARTHQUAKE REGULATIONS

2021 ◽  
Vol 0 (15) ◽  
pp. 0-0
Author(s):  
Fahım Ahmad NOWBAHARI ◽  
Elif AĞCAKOCA
Keyword(s):  
Steel Structure ◽  
Steel Structures ◽  
Seismic Load ◽  
Finite Element Program ◽  
Analysis And Design ◽  
Earthquake Resistant Structures ◽  
Cross Member ◽  
Element Program ◽  
The Cross ◽  
Design Earthquake

When observing the consequences of earthquakes, it is accepted that earthquakes are one of the most dangerous natural disasters in the world. Therefore, special engineering methods are used to explore and analyze the effects of earthquakes on structures and to design earthquake resistant structures accordingly. In applying these methods, it is important to investigate the irregularities in the carrier system correctly. There are six irregularities in the Turkish Building Earthquake Code (TBDY-2018), one of the most important of which is A1 Torsional Irregularity [TBDY 2018]. In this article, considering TBDY 2018, the dynamic behaviour of structures with different ratios of torsional irregularity in multi-storey steel structures is examined. In a 10-storey steel structure with the same purpose and size, four type models were produced using the central inverted V cross member and changing the cross positions. The Equivalent Seismic Load Method is used in the analysis. Structural analyzes were performed with the "ETABS" finite element program. As a result of these studies; The displacements obtained from the structural analysis of 4 models with different torsional irregularity coefficients due to the cross member placement in various places in 4 buildings with the same dimensions were calculated by the Equivalent Seismic Load method.

scholarly journals Effect of Earthquake loads on School Buildings in the Kingdom of Saudi Arabia

2019 ◽  
Vol 5 (1) ◽  
pp. 142
Author(s):  
Yasser Alashker ◽  
Khalid Elhady ◽  
Mohammed Ismaeil
Keyword(s):  
Saudi Arabia ◽  
Seismic Analysis ◽  
Design Method ◽  
Building Design ◽  
Seismic Load ◽  
School Building ◽  
Earthquake Loads ◽  
Analysis And Design ◽  
Gravity Load ◽  
Earthquake Load

Background: The designing of the reinforced concrete building for the reduction of the seismic load has significantly gained popularity. Most of the buildings in Saudi Arabia are designed for the gravity load, based on its seismicity level. Objective: The study evaluates the effects of the earthquake load on the RC school building located in Saudi Arabia. Method: An equivalent static analysis technique used to apply the seismic analysis and design method according to Saudi Building Code SBC301 (2007). This design code is used to redesign the chosen school building. The SAP 2000 structural analysis software was used to analyses and study the structure behaviour due to the seismic load. Results: The results of the study provide that the RC school building design in Saudi Arabia is inadequate, and unsafe for the earth quakes. Conclusion: One of the important conclusions in this study is that the designer of the school building in Saudi Arabia should take into consideration the earthquake loads. It also emphasizes on the development of the adequate framework for the implementation of the safe designing of the buildings inclusive of earthquake safety measures.

Research on Earthquake Load Analysis of Large Structures in Non-Slide Construction

2012 ◽  
Vol 157-158 ◽  
pp. 1632-1635
Author(s):  
Gong Sheng Yang
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Level Structure ◽  
Steel Structure ◽  
Steel Structures ◽  
Deformation Analysis ◽  
Seismic Load ◽  
Large Steel ◽  
Large Bulk ◽  
Earthquake Load

Ocean large steel structures are usually constructed on the slide site, being prone to forming large deformation because of its features such as heavy weight, large bulk and great span. However, the 18 large-scale steel structures of a nickel ore project are need to building on the non-slide foundation, resulting in different settlements of foundation. Moreover, the earthquake load is one of main load of the high-level structure. And the earthquake often happens suddenly and is out of control, with devastating destructive power. To ensure the safety of construction, it’s necessary to analyze the influence of large steel structure responding to the seismic load. This paper expounds the analyzing method on the response of the large steel structure based on non-slide site to the earthquake load. This article has analyzed responses of three-dimensional finite element model to the earthquake load with ANSYS analysis of finite element, such as the stress, deformation analysis, modal analysis and transient dynamic analysis, and assessed the risk of earthquake. This paper provides a feasible and effective analyzed method for researching the response of structure built on non-slide site to the earthquake load, which has important significance for the seismic design of the structure.

Dynamic Characteristics of Base-Isolated Steel Frame under Seismic Ground Motion

2011 ◽  
Vol 255-260 ◽  
pp. 2341-2344
Author(s):  
Mohammad Saeed Masoomi ◽  
Siti Aminah Osman ◽  
Ali Jahanshahi
Keyword(s):  
Ground Motion ◽  
Base Isolation ◽  
Time History ◽  
Steel Structure ◽  
Steel Structures ◽  
Steel Frame ◽  
Nonlinear Time History Analysis ◽  
Seismic Load ◽  
Vector Method ◽  
Seismic Ground Motion

This paper presents the performance of base-isolated steel structures under the seismic load. The main goals of this study are to evaluate the effectiveness of base isolation systems for steel structures against earthquake loads; to verify the modal analysis of steel frame compared with the hand calculation results; and development of a simulating method for base-isolated structure’s responses. Two models were considered in this study, one a steel structure with base-isolated and the other without base-isolated system. The nonlinear time-history analysis of both structures under El Centro 1940 seismic ground motion was used based on finite element method through SAP2000. The mentioned frames were analyzed by Eigenvalue method for linear analysis and Ritz-vector method for nonlinear analysis. Simulation results were presented as time-acceleration graphs for each story, period and frequency of both structures for the first three modes.

On the Analysis and Design of Steel Structure to Mitigate Progressive Collapse

2011 ◽  
Vol 378-379 ◽  
pp. 775-779
Author(s):  
M. Mirtahery ◽  
Zoghi M. Abbasi
Keyword(s):  
Progressive Collapse ◽  
Steel Structure ◽  
Steel Structures ◽  
Risk Level ◽  
Structural Systems ◽  
Acceptable Risk ◽  
Analysis And Design ◽  
Critical Elements ◽  
Load Carrying ◽  
Element Removal

Since Ronan Point tower local collapse in UK in 1968, progressive collapse phenomenon in structures attracted more attention for civil engineers all over the world so there were no useful researches and manual codes related to progressive collapse designing before. Progressive collapse occurs when loading pattern, boundary condition and resisting path changed, so critical elements undergo excessive unpredicted loading. We cannot omit reason of collapse as well as prevention of distribution of it that cause progressive collapse. Also, we cannot predict exact location of collapse beginning, so we should generalized design guides to whole or part of structures elements based on risk analyzing. Also we can use load carrying element removal scenario for critical elements. To prevent progressive collapse, structural systems require to having a well-distributed, redundant lateral load resisting system and ductile connections capable of undergoing large inelastic rotations without failing. There are some new guides and criteria for elements and connections to be designed to resist progressive collapse. Depends on required accuracy, importance of the buildings and acceptable risk level, the analysis methodologies ranged from linear to nonlinear with static and dynamic approaches. In this paper, codes and researches recommendations to resist progressive collapse for steel structures are presented, classified and compared. Also, applicable design methods based on codes and some retrofitting methods are summarized.

scholarly journals Design and Analysis of Truss Type Steel Buliding by using Tekla Software

2021 ◽  
Vol 7 (03) ◽  
pp. 256-271
Keyword(s):  
Cross Sections ◽  
Construction Materials ◽  
Steel Structure ◽  
Wind Load ◽  
Sustainable Construction ◽  
Seismic Load ◽  
Steel Buildings ◽  
Analysis And Design ◽  
Type Steel ◽  
Steel Trusses

Steel offer the range of advantages to the structure Industry. Steel is also one of the most sustainable construction materials, building owners naturally value the flexibility of steel buildings in addition the value of benefits they provide.Steel trusses are widely used to carry the roof loads and to provide horizontal stability. There are numerous advantages to using steel trusses instead of traditional wood trusses, but the main reasons are simplicity and strength. Steel trusses offer a high strength, light weight roof system that can be installed quickly.In this project I use Tekla software. It has a very interactive user interface which allows the users to draw the frame and input the load values and dimensions. Tekla structures are powerful and flexible software for all structural projects. Then according to the specified criteria assigned it analyses the structure and designs the members with structural steel.Our final work was the proper analysis and design of truss type steel building.The Aim of present study is to define proper technique for creating Geometry, cross sections for column and beam etc., developing specification and supports conditions, types of Loads and load combinations. I analyzed and designed a truss type steel building initially for all possible load combinations (dead, live, wind, seismic loads). In this analysis process different types of codes are utilized. Dead load IS:875(Part-1), Live load IS: 875(Part-2), wind load IS 875-(Part-3), seismic load IS 1893. In this study a truss type steel structure is analyzed for seismic and wind load combination using tekla. Implemented manual designing and modelling by using of Tekla software

scholarly journals Development of a Multiaction Hybrid Damper for Passive Energy Dissipation

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Ji-Eun Roh ◽  
Moo-Won Hur ◽  
Hyun-Hoon Choi ◽  
Sang-Hyun Lee
Keyword(s):  
Energy Dissipation ◽  
Steel Structure ◽  
Building Structures ◽  
Control Performance ◽  
Initial Stiffness ◽  
Earthquake Loads ◽  
Earthquake Load ◽  
Hybrid Damper ◽  
Rubber Bearings ◽  
Cyclic Loading Tests

A multiaction hybrid damper (MHD) is designed to have independent hysteretic characteristics under small and large loading conditions, and its control performance for building structures excited by wind or earthquake load is verified. The MHD is composed of steel elements, two friction pads, and two lead rubber bearings (LRBs). Because the friction pads and the LRBs are in series connection, only the LRBs deform before the friction pad slippage occurs. After the friction slippage, the damper deformation concentrates on the friction pads. The initial stiffness and hysteresis are dependent on the properties of the LRB, and the maximum force is determined by the friction pad. Accordingly, the load-deformation behaviors before/after the friction slippage can be independently designed to show optimal performance for a building structure subject to wind and earthquake loads. The cyclic loading tests of a full scale MHD were conducted to evaluate the multiaction behaviors and energy dissipation capacity of the MHD. The control performance of the MHD damper is analytically investigated by using a 20-story steel structure subject to wind loads and a 15-story RC structure excited by earthquake loads. The MHD damper showed good performance for reducing both the linear wind-induced and nonlinear earthquake-induced responses.

scholarly journals Comparative Study of RC Multistorey Building with Floating Column and Shear Wall Subjected To Seismic Load

2021 ◽  
Vol 9 (9) ◽  
pp. 528-535
Author(s):  
Akshay Gajbhiye
Keyword(s):  
Spectrum Analysis ◽  
Response Spectrum ◽  
Shear Wall ◽  
Seismic Load ◽  
Base Shear ◽  
Response Spectrum Analysis ◽  
Soft Storey ◽  
Analysis And Design ◽  
Earthquake Zone ◽  
The Impact

Abstract : In modern multistorey building construction, irregularities like the soft storey, vertical and plan irregularities, floating columns etc are very common. Building with an open ground storey for parking is a common feature that results in floating columns. Floating columns provide column free space and a good aesthetic architectural view of the building. floating column means the end of any vertical element that rests on the beam which leads to discontinuity of columns such that the path of load distribution in multi-storey buildings is disturbed. The use of a floating column also tends to increase the moment in the column, storey shear etc which highly undesirable in seismically active areas. So, the study of the best location where the floating column needs to be provided to reduce the impact due to seismic loads is of primordial importance. Shear wall is a vertical member which is provided from foundation to top storey. In this study shear wall is used in the direction of orientation so that it provides additional strength and stiffness to the buildings. In the present analysis, 8 models are studied. The first model considers a multi-storeyed building without any shear wall and floating column. Other models analysed are with shear wall and by varying the location of floating columns. The analysis and design are done by STAAD.pro V8i SS6 version software and the method used is response spectrum analysis in earthquake zone 4. The effect of floating column location on parameters such as Base shear, Displacement, Maximum moment, storey shear and percentage of steel reinforcement are discussed. The comparison of results of different models is also carried out in detail using graphs and bar charts in this study. The suitable location for providing a floating column with the shear wall is also discussed. Keywords: Floating column, Shear wall, Seismic load, STAAD.pro.v8i, Response Spectrum Analysis.

scholarly journals Pembesaran Gaya Dalam dan Rasio Kekuatan Elemen Struktur Baja untuk berbagai Zona Gempa di Indonesia. (Hal. 74-84)

2019 ◽  
Vol 5 (1) ◽  
pp. 74
Author(s):  
Kamila Shaomi Nazila ◽  
Kamaludin Kamaludin
Keyword(s):  
Steel Structure ◽  
Internal Force ◽  
Building Structure ◽  
Force Analysis ◽  
Earthquake Loads ◽  
Load Variations ◽  
Earthquake Load ◽  
Magnification Ratio ◽  
Internal Forces ◽  
The Moment

ABSTRAKStruktur bangunan dapat dikatakan kuat jika dapat memikul semua beban salah satunya, beban gempa. Waktu mendesain struktur akibat beban gempa lebih lama daripada akibat beban tanpa gempa. Penelitian ini bertujuan untuk memprediksi pembesaran gaya dalam dan prediksi rasio kekuatan pada struktur akibat adanya beban tanpa gempa. Penelitian ini dilakukan terhadap gedung 10 lantai dengan material baja. Tujuh model variasi beban pada gedung sebagai berikut: beban tanpa gempa,beban tanpa gempa dan percepatan 0,2 ; 0,4 ; 0,6 ; 0,8 ; 1,0 ; juga 1,2 . Analisis gaya dalam dan pengecekan kekuatan struktur bangunan menggunakan software ETABS 2015. Hasil yang diperoleh pada balok yaitu, gaya lentur ( ) dengan pembesaran momen maksimum kurang lebih 0,9 kali terhadap momen akibat beban tanpa gempa. Pembesaran momen relatif antar variasi beban kurang lebih 1,2. Hal ini mengakibatkan rasio untuk desain awal kurang lebih 30% untuk daerah gempa kuat.Kata kunci: struktur baja, beban gempa, pembesaran momen, pembesaran rasio. ABSTRACTThe structure of the building can be said to be strong if it can carry all the loads, such as the earthquake loads. Time to design structures due to earthquake loads is longer than without earthquakes loads. This study aims to predict the magnification of internal forces and the ratio of strength to structures due to without earthquake loads. This research was conducted on 10-storysteel building. Seven models of load variations in the building are as follows: load without earthquake, load without earthquake and acceleration of 0.2 , 0.4 , 0.6 , 0.8 , 1.0 , and 1.2 . The internal force analysis and checking of building structure strengthare using ETABS 2015. The results obtained that flexural force ( ) with a maximum moment magnification of approximately 0.9 times the moment due to without earthquake loads on the beam. Enlargement of relative moments between load variations is approximately 1.2. Therefore, ratio of the initial design is approximately 30% for strong earthquake areas. Keywords: steel structure, earthquake load, moment magnification, ratio enlargement.

scholarly journals Kajian Desain Struktur Beton Bertulang Dengan Struktur Baja (Studi Kasus Pada Pembangunan Gedung H Unitomo)

2019 ◽  
Vol 2 (2) ◽  
pp. 79
Author(s):  
Inggrid Loiza Batak ◽  
Safrin Zuraidah ◽  
Budi Hastono
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Concrete Structures ◽  
Steel Structure ◽  
Steel Structures ◽  
Seismic Load ◽  
Reinforced Concrete Structures ◽  
Live Load ◽  
Software Modeling ◽  
Reinforced Concrete Structure

Recently, a structure that is generally applied to the construction of multi-storey buildings is reinforced concrete structure. Structural steel is rarely used nowadays, yet in fact, the steel structures are still able to compete with reinforced concrete structures. Therefore, this study aims to determine the exact profile dimensions and the comparison of material prices between steel structures and reinforced concrete structures for columns and beams in redesigning H Building of Dr. Soetomo University, Surabaya. The WF profile steel will be used in this redesigning project. The structure is modeled using AutoCAD, and then imported into SAP2000 software. Modeling structure consists of columns, primary beams and secondary beams. The loads reviewed from the design are dead load, live load, wind load and seismic load. From the results of design review obtained, the overall strength of structure rearrangement is safe and it is obtained the beam profile dimensions of B1 WF 600x200x12x20, B2 WF 400x300x9x14 profile, B3 WF 400x300x9x14 profile, B4 WF 350x200x8x12 profile, and B5 WF 175x125x 5.5x8 profile, K1 WF 400x400x18x28 column profile, and K2 WF 400x400x21x21 column profile. The use of steel structures as a substitute for reinforced concrete structures for columns and beams in the building is a way more expensive with the percentage of steel structure 149.13% more expensive than reinforced concrete structure.

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