scholarly journals PERFORMANCE-BASED SEISMIC EVALUATION FOCUSED ON CONTRIBUTION OF STRUCTURAL FRAME, NON-STRUCTURAL ELEMENTS AND BUILDING EQUIPMENTS TO SEISMIC RISK

2012 ◽  
Vol 77 (672) ◽  
pp. 177-186
Author(s):  
Yukako SHIMIZU ◽  
Masato MOTOSAKA ◽  
Hiroshi ISHIDA
Keyword(s):  
Seismic Risk ◽  
Structural Elements ◽  
Seismic Evaluation ◽  
Structural Frame

Seismic performance evaluation of a precast concrete structure with deformation-based limit criterions

2021 ◽  
Vol 4 (3) ◽  
pp. 140-150
Author(s):  
Sadık Can Girgin ◽  
Cem Göksoy ◽  
Emine Daş ◽  
İbrahim Serkan Mısır
Keyword(s):  
Performance Evaluation ◽  
Precast Concrete ◽  
Time History ◽  
Engineering Practice ◽  
Structural Elements ◽  
Performance Limits ◽  
Seismic Evaluation ◽  
Reinforcing Bar ◽  
Evaluation Approach ◽  
Significant Difference

In precast reinforced concrete buildings, which constitute an important part of the industrial buildings in Turkey, the force flow between the structural elements is provided by beam-column connections with or without transferring moments. In general, moment resisting beam-column connections with mechanical or emulative components are applied at the mezzanine level. For precast concrete structures, strength-based design is the most common design approach in engineering practice. In recent years, performance based seismic design and evaluation approach also gained attention which provides numerical estimation of the damage in structural elements subjected to earthquake loading. This study presents the performance based seismic assessment of a two-story precast building based on the seismic evaluation requirements of Turkish Building Earthquake Code 2018. For this purpose, numerical simulation model has been established by using lumped plasticity models for connections and distributed plasticity models for columns. Strong ground motion records are scaled based on TBEC-2018 acceleration spectrum for a specific location, and nonlinear time history analyses are performed in x and y directions simultaneously. The performance evaluation results using average deformations show that there is a significant difference between plastic rotation and reinforcing bar strain performance limits.

scholarly journals The Usage of Alternative Materials to Optimize Bus Frame Structure

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1010 ◽  
Author(s):  
Tautvydas Pravilonis ◽  
Edgar Sokolovskij ◽  
Artūras Kilikevičius ◽  
Jonas Matijošius ◽  
Kristina Kilikevičienė
Keyword(s):  
Dynamic Properties ◽  
Steel Structure ◽  
Frame Structure ◽  
Structural Elements ◽  
Resonant Frequencies ◽  
Centre Of Gravity ◽  
Alternative Materials ◽  
Structural Frame ◽  
Strength And Stiffness ◽  
Key Indicators

The strength and stiffness of the frame is one of the key indicators of vehicle structures. Insufficient stiffness causes vibration and noise, and is also less comfortable for both the passengers and the driver. Symmetry is required between the strength and comfort of the structural frame, which depends on vibration and noise. This article analyses the frame of the structure of a medium-sized passenger bus and its dynamic properties, when replacing materials of structural elements which do not affect the symmetry of the structure. The conducted theoretical and experimental modal analysis of the bus, allows for evaluating dynamic parameters and validating the theoretical model based on the experimental results. The optimization of the medium-sized passenger bus frame—by replacing the material of the ancillary frame elements with fiberglass—reveals that its dynamic characteristics change by up to 20%, comparing the values of the first three resonant frequencies with those of the steel structure. The obtained results show that replacing the material of ancillary frame elements with fiberglass, while maintaining the symmetrical arrangement of the elements in the structure, does not change the safety characteristics of the structure, reducing the mass of the frame by 11%, and shifting the coordinate of the centre of gravity vertically downwards, which is very important for stability, comfort and fuel consumption.

scholarly journals Playing games for risk prevention: design, implementation and testing of serious games in recent European projects UPStrat-MAFA and KnowRISK

2021 ◽  
Vol 63 (Vol 63 (2020)) ◽  
Author(s):  
Stefano Solarino ◽  
Monica Amaral Ferreira ◽  
Gemma Musacchio ◽  
Elena Eva
Keyword(s):  
Seismic Risk ◽  
Serious Games ◽  
Structural Elements ◽  
Prevention Strategies ◽  
Social Ecological ◽  
Urban Disaster ◽  
Risk Education ◽  
Reduce Risk ◽  
European Projects ◽  
Standard Learning

In the last decade, bottom-up strategies of risk education have raised importance, making serious games to become an alternative or complementary teaching tool for enhancing skills for a collaborative and adaptive response to social-ecological challenges. This study describes issues and challenges of serious games implemented within the framework of two European projects, namely UPStrat-MAFA (Urban Disaster Prevention Strategies using Macroseismic Fields and FAult sources) and KnowRISK (Know your city, Reduce seISmic risK through non-structural elements); the goal is to instil in young people a proactive attitude towards the mitigation of seismic risk . The games were tested in some dissemination events focussed on fostering seismic risk preparedness in students and improving good practices. We discuss the performance of our games even against more standard approaches to risk education. Our experience shows a rise of students’ engagement compared to standard learning activities. The games were effective as students were able to grasp the most relevant actions to reduce risk.

scholarly journals Analisis Perilaku Struktur Perkantoran Tahan Gempa Menggunakan Metode Pushover Analysis

2020 ◽  
Vol 6 (2) ◽  
pp. 141-154
Author(s):  
Rinda Fitri Nabhilla ◽  
Gati Annisa Hayu
Keyword(s):  
Structural Analysis ◽  
Earthquake Engineering ◽  
Pushover Analysis ◽  
Lateral Load ◽  
Performance Level ◽  
Office Building ◽  
Structural Deformation ◽  
Structural Elements ◽  
Seismic Evaluation ◽  
Earthquake Load

A research about structural analysis of eight-story office building due to earthquake load and to identify the performance level of the structure referring to ATC-40. Performance Based Seismic Evaluation (PBSE) concept is used for earthquake engineering by using one of the method which is Pushover Analysis to evaluate the structure. This method is to purposely apply escalating static lateral load to the structure until failure occurs to the structural elements and targeted structural displacement was obtained. Determining the targeted displacement is referring to ATC-40, FEMA 365, and FEMA 440. Results show that targeted displacement value is 0,015 m for X direction and Y direction as well as the total drift was obtained as much as 0,0066 m for X direction and 0,00273 m for Y direction. According to the structural deformation and criteria from ATC-40 the performance level of the structure is at Immediately Occupancy (IO).

Salt and Diapiric Anomalies in the Southeast Bonaparte Gulf Basin

1974 ◽  
Vol 14 (1) ◽  
pp. 85 ◽  
Author(s):  
D. W. Edgerley ◽  
R. P. Crist
Keyword(s):  
Geophysical Data ◽  
Structural Elements ◽  
Sedimentary Sequence ◽  
Seismic Evaluation ◽  
Precambrian Rocks

The Southeast Bonaparte Gulf Basin comprises a Phanerozoic sedimentary sequence bordered by Precambrian rocks of the Kimberley, Sturt and Darwin Blocks. This portion of the basin developed as a subsiding graben, in which the flanks are separated from the central collapsed area by terraces that foundered to intermediate depths. Geophysical data acquired in the area since 1965 suggest the existence of large quantities of evaporites in the basin. Wells drilled in the area have confirmed the seismic evaluation. These evaporites were initially deposited across existing terraces and basinal areas prior to the later Devonian. Salt and diapiric structures of various types are widely distributed within the basin. The origin and growth of most of these structures is associated with epeirogenic movements along faults that demarcate the major structural elements of the basin.

Behaviour of Reinforced Concerete Infilled Frames Under Seismic Loads

2013 ◽  
Vol 61 (3) ◽  
Author(s):  
A. Kadid ◽  
S. Noui ◽  
A. Zine ◽  
D. Yahiaoui
Keyword(s):  
Seismic Risk ◽  
Structural Response ◽  
Seismic Loads ◽  
Structural Components ◽  
Seismic Evaluation ◽  
Lateral Capacity ◽  
Rc Frames ◽  
Infill Panels ◽  
Frame Buildings ◽  
Algerian Seismic Code

A significant portion of the buildings constructed in Algeria is structural frames with infill panels which are usually considered as non structural components and are neglected in the analysis. However, these masonry panels tend to influence the structural response. Thus, these structures can be regarded as seismic risk buildings, although in the Algerian seismic code there is little guidance on the seismic evaluation of infilled frame buildings. In this study, three RC frames with 2, 4 and 8 storey and subjected to three recorded Algerian accelerograms are studied. The diagonal strut approach is adopted for modeling the infill panels and a fiber model is used to model RC members. This paper reports on the seismic evaluation of RC frames with brick infill panels. The results obtained show that the masonry panels enhance the load lateral capacity of the buildings and the infill panel configuration influences the response of the structures.

Seismic Vulnerability Evaluation of Bridges in Memphis and Shelby County, Tennessee

1993 ◽  
Vol 9 (4) ◽  
pp. 803-816 ◽  
Author(s):  
S. Pezeshk ◽  
T. S. Chang ◽  
K. C. Yiak ◽  
H. T. Kung
Keyword(s):  
Seismic Vulnerability ◽  
Seismic Retrofitting ◽  
Screening Procedure ◽  
Seismic Zone ◽  
Structural Elements ◽  
Seismic Evaluation ◽  
Earthquake Preparedness ◽  
Vulnerability Evaluation ◽  
Earthquake Loss ◽  
Shelby County

The focus of this paper is to develop a screening procedure to obtain information and assess vulnerability of bridges located in the New Madrid seismic zone (NMSZ). This screening methodology includes structural elements, site, foundation, and importance of the bridge. An inventory of the river-crossing bridges in Memphis and Shelby County is made using the developed screening procedure; potentially hazardous bridges that require further detailed seismic evaluation and/or immediate seismic retrofitting are identified. The results of this study are important for future maintenance and improvement, earthquake loss estimates, seismic hazard/risk reduction, and earthquake preparedness/rescue plans for river-crossing bridges in the NMSZ.

scholarly journals SEISMIC EVALUATION OF SQUARE HSS BRACES IN SCBF USING REGRESSION ANALYSIS

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Mahmoud Faytarouni ◽  
Onur Seker ◽  
Bulent Akbas ◽  
Jay Shen
Keyword(s):  
Regression Analysis ◽  
Seismic Risk ◽  
Structural Engineering ◽  
Slenderness Ratio ◽  
Experimental Studies ◽  
Engineering Practice ◽  
Seismic Evaluation ◽  
Dynamic Analyses ◽  
Post Buckling ◽  
Hollow Structural Sections

Since the 1990s, structural engineering practice geared toward the use of hollow structural sections (HSS), notably square HSS, for their economy, and ease of design and construction. According to the AISC Seismic Provisions, during a severe earthquake, these braces could undergo post-buckling axial deformations 10 to 20 times their yielding deformation. However, recent experimental studies indicate that braces made of square HSS, depending on their size, width-to-thickness, and slenderness ratio, are vulnerable to fracture even prior to 10. Therefore, relying on past experimental studies comprised of a few square HSS specimens to develop seismic requirements for SCBF with square HSS could lead to underestimation of the seismic risk. This paper aims to evaluate the fracture risk of braces in existing SCBFs designed in accordance with AISC 341-05 and AISC 341-16 through incremental dynamic analyses (IDA) along with experimentally developed regression model that estimates fracture.

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