Here I share for Steel Table section properties with metric unit
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DEVELOPMENT OF SEISMIC VULNERABILITY ASSESSMENT METHODOLOGIES OVER THE PAST 30 YEARS
Author: G.M. Calvi*, R. Pinho**, G. Magenes*, J.J. Bommer***, L.F. Restrepo-Vélez**** and H. Crowley** *Department of Structural Mechanics, University of Pavia, Pavia, Italy **European Centre for Training and Research in Earthquake Engineering (EUCENTRE), Pavia, Italy ***Department of Civil and Environmental Engineering, Imperial College London, U.K.Solingral S.A., Medellin, Colombia | Size: 0.87 MB | Format:PDF | Quality:Unspecified | Year: 2009 | pages: 30
Models capable of estimating losses in future earthquakes are of fundamental importance for
emergency planners and for the insurance and reinsurance industries. One of the main ingredients in loss model is an accurate, transparent and conceptually sound algorithm to assess the seismic vulnerability of the building stock and indeed many tools and methodologies have been proposed over the
past 30 years for this purpose. This paper takes a look at some of the most significant contributions in the
field of vulnerability assessment and identifies the key advantages and disadvantages of these procedures
in order to distinguish the main characteristics of an ideal methodology.
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Seismic Response of Reinforced Concrete Structures Affected by Reinforcement Corrosion
Author: Paola Simioni | Size: 5.4 MB | Format:PDF | Quality:Unspecified | Publisher: Faculty of Architecture, Civil Engineering and Environmental Sciences University of Braunschweig – Institute of Technology | Year: 2009 | pages: 186
Durability of RC structures is a well known critical issue, requiring a time-dependent assessment of the structural performance. In fact, the progressive deterioration of the materials properties may significantly affect the response of the whole structural system, compromising the capability of the structure to withstand the loads for which it was designed. Thus, civil engineers are concerned not only with the need for durable design, but also with the importance of maintenance, inspection and, if necessary, reparation/rehabilitation interventions during the structure’s service life.
Experience shows that corrosion of reinforcing steel may be cited as the major source of degradation, increasing the structural vulnerability to extreme loads and natural hazards. In particular, the variation of the mechanical properties of steel, concrete and their interfacial layer induced by corrosion may result in the reduction of the load bearing capacity and, in some cases, also the shift of the failure mechanism from the ductile to the fragile type. These aspects become a main issue in safety assessment, with noteworthy implications in seismic prone areas, where the ductility characteristics of the structure are of primary importance for a good seismic behaviour. In order to support decision makers with a better comprehension of the matter of safety assessment, the concept of risk management has recently become of great concern also in civil engineering, being already popular in other disciplines. The general procedure developed within the International Graduate College IGC 802 allows managing risk in any situation or field in which an undesired or unexpected event could be significant, providing a greater insight of its possible outcomes and thus giving the possibility to control its impacts. In the submitted dissertation a methodology is presented to investigate the effects induced by increasing levels of environmental degradation on the seismic response of RC structures, focusing on the consequences of reinforcement corrosion on the local and global structural behaviour. Referring to the risk management procedure, both seismic shaking and reinforcement corrosion were identified as the hazards endangering the system. Within the risk analysis phase, a new module for the specific management of steel corrosion was proposed (“corrosion risk management chain”). The evaluation of the structural vulnerability was carried out at two different levels of investigation. A “micro” level approach allowed describing the influence of corrosion on the bond-slip behaviour between reinforcing bars embedded in concrete and concrete itself. A new bond law was developed, able to describe the degradation of bond strength due to environmental attacks, in pull-out and beam tests. By means of the “macro” level approach it was possible to describe the variation of the seismic performance of a RC building at the end of its service life respect to the time of construction. It was assumed that, in accordance to the climatic characteristics of the site, the structure suffered of a moderate corrosion attack due to carbonation, resulting in the reduction of load bearing capacity and structural ductility.
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As dams age, they are subject to a series of external agents and processes which tend to deteriorate the qualities with which they were originally conceived to stand against these actions. At the same time, it is often necessary to respond to increased safety standards, either in the structural or hydrological fields. Reservoir sedimentation or water quality issues within the reservoir also give raise to problems that must be addressed. Lastly, climatic change in the management of water resources, and the need for sustainability have clearly become new incidence factors with which Dam Owners will have to coexist in the future.
Therefore it is obvious that an increase in budget allocation for remedial and conservation measures is required, in order to reach the increasing operation, supply and security measures which are being established. The relevance of this factor is mostly emphasized in developed countries which own an important heritage of aging dams.
In this context, Dam Maintenance and Rehabilitation II constitutes a complete review of the state of art in techniques concerning dam retrofitting and conservation. Contributions are presented either in English or Spanish and correspond to a wide range of topics related to dam maintenance, behaviour evaluation and rehabilitation. This shared knowledge and experience will surely be highly relevant for dam academics and professionals at all technical and administrative levels.
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ABSTRACT
Within previous decades, the seismic effects had not been considered when designed and constructed the buildings.
But now, due to the development of technology and knowledge, the seismic effects had been taken into consideration in design and construction of the structures.
This study deals with the building which was not considered the seismic effects and is reviewed with subjected to moderate seismic forces to know the performance of the building.
In this study, twelve-storey reinforced concrete building (ordinary moment-resisting frame) was considered to investigate the effects of moderate earthquake but substructure analysis was not considered.
First, the three dimensional model was analysed and designed under gravity load and wind load.
And then, the same model was reanalysed with the effects of moderate seismic forces (zone 2A).
Repeated analyses for this structure were considered for seismic forces (zone 2A) in both factored and unfactored load conditions.
For analysis and design of without seismic effect, ten load combinations were considered and then twenty-six load combinations with seismic effects.
Finally, analysis results in main structural components such as axial force and bending moments for columns, shear, torsion and bending moments for beams were compared for the performance of ordinary moment-resisting frame under three different types of analytical conditions described in above.
Moreover, storey drifts, storey displacement and storey shear were also compared in this study.
Structural analysis was carried out by using Extended Three Dimensional Analysis of Building Systems (ETABS) version 8.4.8 software.
Load assumptions and combinations were considered according to the provisions of Uniform Building Code – UBC (1997) and American Concrete Institute -ACI 318-99 respectively.
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All credits for ( k2kyaw ) in the following thread
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Article/eBook Full Name: Approximate analytical solution for bernoulli-euler beams under different boundary conditions with non-linear winkler type foundation
Author(s): Mohammadpour, A., Rokni, E., Fooladi, M., Kimiaeifar, A.
Edition: Volume 50, Issue 2
Publish Date: 2012
Published By: Journal of Theoretical and Applied Mechanics
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Article/eBook Full Name: Design Guide 28: Stability Design of Steel Buildings
Author(s): AISC
Edition: 2nd
Publish Date: 2013
Published By: AISC
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Author: Yong Wang, Ian Burgess, Frantisek Wald and Martin Gillie | Size: 12 MB | Format:PDF | Quality:Unspecified | Publisher: CRC | Year: 2012 | pages: 394 | ISBN: 041555733X
Major events—notably the Broadgate fire in London, New York’s World Trade Center collapse, and the Windsor Tower fire in Madrid—as well as the enlightening studies at the Cardington fire research project have given international prominence to performance-based structural fire engineering.
As a result, structural fire engineering has increasingly attracted the interest not only of fire and structural engineers but also of researchers and students. And studies in recent years have generated a vast number of findings.
Performance-Based Fire Engineering of Structures summarizes the latest knowledge on performance-based approaches to structural fire engineering, enabling readers to critically assess research in the field. Whereas most recent books have been mainly concerned with dissemination of principles encapsulated in established codes of practice such as the Eurocodes, this work addresses in depth:
• Global structural behaviour and modelling
• Progressive collapse of structures in fire and the importance of connection robustness
• The integrity of compartmentation in fire
• Structural fire engineering under realistic fire conditions and its implications for material properties
• The limitations of research results and design methods
• The unexploited potential for advanced fire engineering design
This authoritative book draws on the work of internationally active researchers who were core members of the European Network project’s COST C26 working group on fire resistance. It helps readers develop a thorough understanding of how to use advanced fire engineering design to improve structural safety and reduce construction costs.
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Steve Hencher presents a broad and fresh view on the importance of engineering geology to civil engineering projects.
Practical Engineering Geology provides an introduction to the way that projects are managed, designed and constructed and the ways that the engineering geologist can contribute to cost-effective and safe project achievement. The need for a holistic view of geological materials, from soil to rock, and of geological history is emphasised. Chapters address key aspects of
• Geology for engineering and ground modelling
• Site investigation and testing of geological materials
• Geotechnical parameters
• Design of slopes, tunnels, foundations and other engineering structures
• Identifying hazards
• Avoiding unexpected ground conditions
The book is illustrated throughout with case examples and should prove useful to practising engineering geologists and geotechnical engineers and to MSc level students of engineering geology and other geotechnical subjects.
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