Earthquake engineering is the ultimate challenge for structural engineers. Even if natural phenomena involve great uncertainties, structural engineers need to design buildings, bridges, and dams capable of resisting the destructive forces produced by them. These disasters have created a new awareness about the disaster preparedness and mitigation. Before a building, utility system, or transportation structure is built, engineers spend a great deal of time analyzing those structures to make sure they will perform reliably under seismic and other loads. The purpose of this book is to provide structural engineers with tools and information to improve current building and bridge design and construction practices and enhance their sustainability during and after seismic events. In this book, Khan explains the latest theory, design applications and Code Provisions. Earthquake-Resistant Structures features seismic design and retrofitting techniques for low and high raise buildings, single and multi-span bridges, dams and nuclear facilities. The author also compares and contrasts various seismic resistant techniques in USA, Russia, Japan, Turkey, India, China, New Zealand, and Pakistan.
Written by a world renowned author and educator
Seismic design and retrofitting techniques for all structures
Tools improve current building and bridge designs
Latest methods for building earthquake-resistant structures
Combines physical and geophysical science with structural engineering
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SRS-263 Deflections of reinforced concrete floor slabs
Author: Vanderbilt - Sozen - Siess | Size: 14.5 MB | Format:PDF | Quality:Unspecified | Publisher: University of Illinois | Year: 1963 | pages: 304 | ISBN: NA
This report is one of a continuing series of reports written as part of the investigation of multiple-panel reinforced concrete floor slabs which is currently being conducted at the University of Illinois. The floor slab investigation has as its over-all objective the development of a unified design procedure for floor slabs.
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SEISMIC PERFORMANCE OF MULTI-SPAN RC BRIDGE WITH IRREGULAR COLUMN HEIGHTS
Author: Samy Muhammad Reza | Size: 3.3 MB | Format:PDF | Quality:Unspecified | Publisher: THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) | Year: 2012
Bridges are essential elements in modern transportation network and play a significant role
in a country’s economy. However, it has always been a major challenge to keep bridges safe and
serviceable. Modern bridge design codes include seismic detailing in order to ensure ductile
behavior, which was absent in the pre-1970 codes that made older bridges vulnerable during
earthquakes. The main parameters effecting the performance of bridge (tie spacing, concrete and steel properties, amount of reinforcement) varies significantly from old to modern bridges. The presence of irregularity in column heights is one of the common causes of seismic vulnerability and the non-uniform column height is the most common form of irregularity. In this study, a four span RC box-girder bridge has been considered for different column height configurations. Here, a detailed parametric study has been performed to understand the effects of various factors on the limit states of the individual bridge columns using factorial analysis. Static pushover analyses, incremental dynamic analyses and fragility analyses of bridges with irregular column heights have been conducted to identify the seismic vulnerability of bridges in the longitudinal direction due to irregularity in column height. This study also investigated the difference of conventional force-based approach and displacement-based approach in designing a bridge with irregular column heights. Canadian Highway Bridge Design Code (CHBDC) and AASHTO 2007, like other traditional design codes follow force-based design (FBD) method, which is focused at the target force resistance capacity of the structure. On the other hand, displacement-based design approach focuses on a target maximum displacement of the bridge during the earthquake in a
specific zone. Seismic performances of the bridges designed in two different methods have been compared by non-linear dynamic analyses in the longitudinal direction in terms of maximum and residual displacements and energy dissipation capacity.
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PERFORMANCE ASSESSMENT OF SHEAR-CRITICAL REINFORCED CONCRETE PLANE FRAMES
Author: Serhan Güner | Size: 6 MB | Format:PDF | Quality:Unspecified | Publisher: University of Toronto | Year: 2008 | pages: 464
Current analysis procedures for new reinforced concrete structures are typically based on linear-elastic principles. However, under certain conditions, it may be necessary to analyze a structure to more accurately predict its structural behaviour. Such an analysis can be performed using nonlinear analysis procedures which typically require specialized software. This type of software is limited in number and most available programs do not adequately capture shear-related influences, potentially severely overestimating strength and ductility in shear-critical structures. The purpose of this study is to develop and verify an analytical procedure for the nonlinear analysis of frame structures with the aim of capturing shear-related mechanisms as well as flexural and axial effects. A previously developed analysis program, VecTor5, is further developed for this purpose. Originally formulated in the early 1980s at the University of Toronto, VecTor5 is based on the Modified Compression Field Theory (MCFT) and capable of performing nonlinear frame analyses under temperature and monotonic loading conditions. Although providing generally satisfactory simulations, there are a number of deficiencies present in its computational algorithms.
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We are so sorry due to last problem in loading Civilea.com website.
Recently we have high load on old server, we decided to upgrade our main server, we migrated to a good and also expensive server at same datacenter, CivilEA is located on this datacenter in last 4 year and we really agree with it, they are expert, famous, friendly company.
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Article/eBook Full Name: soil mechanic and foundation
Author(s): Dr. B.C. Punmia, Ashok Kumar Jain, Arun Kr. Jain
Publish Date: 2005
ISBN: 978-8170087915
Published By: Laxmi Publications (December 15, 2005)
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I am searching for this paper since it is used as a reference for the SRD curves, used as input for drivability analysis for piles. Does anyone has it?
Article/eBook Full Name: Evaluating Drivability for Hard Clay, Very Dense Sand, and Rock
Author(s): Stevens, R.S., Wiltsie, E.A., Turton, H.
Publish Date: 1982
ISBN: 978-1-61399-072-8
Published By: Offshore Technology Conference (OTC)
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Article Full Name: Centrifuge modelling of piled raft foundations on clay
Author(s): K. Horikoshi ; M. F. Randolph
Publish Date: 1996
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VULNERABILITY OF HISTORICAL MASONRY BUILDINGS UNDER EXCEPTIONAL ACTIONS
Author: Gilda Florio | Size: 23.1 MB | Format:PDF | Quality:Unspecified | Publisher: Università degli Studi di Napoli Federico II Facoltà di Ingegneria | Year: 2010 | pages: 292
This work focuses on the vulnerability of historical masonry buildings under
exceptional actions. So, the three key-concepts of this thesis are:
1. Vulnerability
2. Historical masonry construction
3. Exceptional action
The vulnerability of a constructions represents its propensity to suffer a certain damage level under a catastrophic event, seismic or not. It is commonly expressed by functions or matrices which may be obtained either by statistical studies of damaged buildings in earthquake-struck areas or by simulations using numerical models of the structure. Seismic vulnerability topic is included in the field of seismic risk, which also involves hazard and exposure. The importance of seismic risk is related to the public safety that requires suitable management measures in order to protect people, properties, infrastructures and the built up cultural heritage. Therefore, a seismic risk analysis is aimed at the assessment and the hypothetical, quantitative description of the consequences of earthquakes upon a geographical area in a certain period of time. The most vulnerable construction, but also the most valuable ones, are the historical ones, mostly made of oldest building material, that is masonry. In fact, on one hand ancient masonry structures are particularly vulnerable to dynamic actions, especially seismic actions, since they were designed to resist ordinary vertical loads only, in compliance with the technical rules of their time of construction, so that they present an insufficient safety level against the exceptional actions. On the other hand, old constructions constitute the cultural heritage of a nation, because they are imbued with historicity. This historicity
does not only coincides with the concept of monuments or with the formal architectural language, but also to the specific structural features, applied materials and building techniques and, due to their age, to the fact that they are a part of human life. Thus, the historical heritage include monumental buildings, which may have great artistic values and are characterized by their own unique history, and historical centres, which represent the sign of the human past. The issue of the protection of historic building is very important in Italy. In fact, this Nation is characterized by a large number of ancient monuments and dwellings, apart from innumerable minor centres. This need of preservation of the built up heritage is strongly related to the past lessons. Italy, indeed, has experienced destructive earthquakes throughout its history, which have provoked considerable social and economic losses. For this reasons, the public awareness is very sensitized of this issue and the conservation of the historic heritage becomes a pressing need.
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Seismic Performance of Brick Infilled RC Frame Structures in Low and Medium rise Buildings in Bhutan
Author: Jigme Dorji | Size: 4.8 MB | Format:PDF | Quality:Unspecified | Publisher: Centre for Built Environment and Engineering Research Queensland University of echnology | Year: June 2009 | pages: 158
The construction of reinforced concrete buildings w
ith unreinforced infill is common practice even in seismically active country such as Bhutan, which is located in high seismic region of Eastern Himalaya. All buildings c onstructed prior 1998 were constructed without seismic provisions while those constructed after this period adopted seismic codes of neighbouring country, India. However, the codes have limited information on the design of infilled struc tures besides having differences in architectural requirements which may compound the structural problems. Although the influence of infill on the reinforced concrete framed structures is known, thepresent seismic codes do not consider it due to the lack of sufficient information.Time history analyses were performed to study the influence of infill on the performance of concrete framed structures. Important parameters were considered and
the results presented in a manner that can be used
by practitioners. The results show that the influence of infill on the structural performance is significant. The structural responses such as funda mental period, roof displacement,
inter-storey drift ratio, stresses in infill wall a
nd structural member forces of beams
and column generally reduce, with incorporation of
infill wall. The structures designed and constructed with or without seismic provision perform in a similar manner if the infills of high strength are used.
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