Structural Bearings and Expansion Joints for Bridges

2002 ◽  
Author(s):  
Günter Ramberger
Keyword(s):  
Smooth Transition ◽  
Noise Emission ◽  
Expansion Joints ◽  
Bridge Superstructures ◽  
Analysis And Design ◽  
Long Time ◽  
Comprehensive Survey ◽  
Inspection And Maintenance ◽  
Bridge Bearings ◽  
Design Construction

<p>Bridge superstructures have to be designed to permit thermal and live load strains to occur without unintended restraints. Bridge bearings have to transfer forces from the superstructure to the substructure, allowing all movements in directions defined by the designer. The two functions -transfer the loads and allow movements only in the required directions for a long service time with little maintenance - are not so easy to fulfil. Differ­ent bearings for different purposes and requirements have been developed so, that the bridge designer can choose the most suitable bearing.</p> <p>By the movement of a bridge, gaps are necessary between superstructure and substructure. Expansion joints fill the gaps, allowing traffic loads tobe carried and allowing all expected displacements with low resistance. Ex­pansion joints should provide a smooth transition, avoid noise emission as far as possible and withstand all mechanical actions and chemical attacks (de-icing) for a long time. A simple exchange of all wearing parts and of the entire expansion joint should be possible.</p> <p>The present volume provides a comprehensive survey of arrangement, construction and installation of bearings and expansion joints for bridges including calculation of bearing reactions and movements, analysis and design, inspection and maintenance. A long list of references deals with the subjects but also with aspects in the vicinity of bearings and expansion joints.</p> <p>This book is aimed at both students and practising engineers, working in the field of bridge design, construction, analysis, inspection, maintenance and repair.</p>

Process Piping: The Complete Guide to ASME B31.3, Fourth Edition

2021 ◽  
Author(s):  
Charles Becht, IV
Keyword(s):  
Pipe Wall ◽  
Background Information ◽  
Fourth Edition ◽  
Expansion Joints ◽  
Analysis And Design ◽  
Additional Information ◽  
Flexibility Analysis ◽  
Process Piping ◽  
Expert Commentary ◽  
Welding Processes

Fully updated for the 2020 Edition of the ASME B31.3 Code, this fourth edition provides background information, historical perspective, and expert commentary on the ASME B31.3 Code requirements for process piping design and construction. It provides the most complete coverage of the Code that is available today and is packed with additional information useful to those responsible for the design and mechanical integrity of process piping. The author and the primary contributor to the fourth edition, Don Frikken are a long-serving members, and Prior Chairmen, of the ASME B31.3, Process Piping Code committee. Dr. Becht explains the principal intentions of the Code, covering the content of each of the Code's chapters. Book inserts cover special topics such as calculation of refractory lined pipe wall temperature, spring design, design for vibration, welding processes, bonding processes and expansion joint pressure thrust. Appendices in the book include useful information for pressure design and flexibility analysis as well as guidelines for computer flexibility analysis and design of piping systems with expansion joints. From the new designer wanting to known how to size a pipe wall thickness or design a spring to the expert piping engineer wanting to understand some nuance or intent of the code, everyone whose career involves process piping will find this to be a valuable reference.

Expansion joints with low noise emission

2008 ◽  
pp. 51-52
Author(s):  
C O’Suilleabhain ◽  
G Moor ◽  
T Spuler
Keyword(s):  
Low Noise ◽  
Noise Emission ◽  
Expansion Joints

scholarly journals Visual Behavior Based Bio-Inspired Polarization Techniques in Computer Vision and Robotics

2012 ◽  
pp. 243-272 ◽  
Author(s):  
Abd El Rahman Shabayek ◽  
Olivier Morel ◽  
David Fofi
Keyword(s):  
Computer Vision ◽  
Object Recognition ◽  
Visual Perception ◽  
Polarization Vision ◽  
Visual Behavior ◽  
Biologically Inspired ◽  
Long Time ◽  
Comprehensive Survey ◽  
High Level ◽  
And Robotics

For long time, it was thought that the sensing of polarization by animals is invariably related to their behavior, such as navigation and orientation. Recently, it was found that polarization can be part of a high-level visual perception, permitting a wide area of vision applications. Polarization vision can be used for most tasks of color vision including object recognition, contrast enhancement, camouflage breaking, and signal detection and discrimination. The polarization based visual behavior found in the animal kingdom is briefly covered. Then, the authors go in depth with the bio-inspired applications based on polarization in computer vision and robotics. The aim is to have a comprehensive survey highlighting the key principles of polarization based techniques and how they are biologically inspired.

Assessment of Elevator Risk and Code Requirements to Address These Hazards

2019 ◽  
Author(s):  
Thomas Bress ◽  
Eugenia Kennedy ◽  
MariAnne Sullivan ◽  
Mark Guttag
Keyword(s):  
Older Adults ◽  
Surveillance System ◽  
Body Part ◽  
Consumer Product Safety Commission ◽  
Injury Surveillance System ◽  
Safety Code ◽  
Inspection And Maintenance ◽  
Elevator Door ◽  
The U.S ◽  
Design Construction

Abstract The ASME A17.1 Safety Code for Elevators and Escalators establishes safe practices in the design, construction, installation, operation, testing, inspection, and maintenance of elevators. This Code continues to be updated with new regulations to improve safety for elevator riders. The estimated number of elevators in service in the U.S. is approximately 1.1 million.1 Two of the most common injuries for elevator riders are associated with unexpected door closures and trips and falls when entering or leaving an elevator. A recent study reported that door-related incidents accounted for 40% of the total elevator related injuries [1]. This same study reported that another 40% of the total injuries were associated with trips and falls caused by elevator cars that were not level with the landing. These two hazards result in approximately 80% of the elevator-related injuries occurring at the entrance of the elevator. Other recent studies have concluded that older adults [2] and young children [3] are particularly impacted by these elevator-related hazards. This paper will focus on identifying and analyzing the hazards associated with elevator door closures. In this study, the National Electronic Injury Surveillance System (NEISS) database of the U.S. Consumer Product Safety Commission (CPSC) is reviewed from 1990 to 2017 to better understand the trends associated with door strikes, the affected body part and the age of those involved in the incidents. This study also explores and discusses the safety mechanisms currently available to address these hazards. An examination of updates to the ASME A17.1 Code along with improvements in door reopening technologies will be presented to guide the discussion.

scholarly journals Penerapan SAK ETAP Pada Koperasi Aktif di Jawa Barat Sebagai Acuan Pembuatan Aplikasi Akuntansi Koperasi Berbasis Android

2021 ◽  
Vol 12 (1) ◽  
pp. 65-78
Author(s):  
Toufiq Agung Pratomo Sugito Putra ◽  
Muhamad Ardi Nupi Hasyim
Keyword(s):  
Information System ◽  
System Design ◽  
Financial Reporting ◽  
Design Method ◽  
System Development ◽  
Accounting Information ◽  
Accounting Information System ◽  
Analysis And Design ◽  
Use Of Technology ◽  
Long Time

The development of accounting information technology has actually been going on for a long time. This is because the use of technology in accounting can save time and costs and the use of technology in accounting is considered very efficient. In order to provide accounting information, an information system known as the Accounting Information System (SIA) was created. A good accounting information system requires a good system design too. At  Cooperative, data processing is still done manually using Microsoft Excel, which makes this cooperative vulnerable to recording errors. Apart from errors in recording, delays in delivering information can also occur due to ineffective recording. Therefore, this cooperative needs to use a cooperative accounting information system. Which this system will later be able to assist the cooperative in carrying out the existing transaction process in the cooperative effectively and efficiently and well computerized. Based on this, this study aims to determine the financial reporting accounting information system that has been implemented by the Cooperative and to design an application-based savings and loan cooperative financial reporting accounting information system in accordance with the needs of Cooperative. This study used qualitative and experimental methods, while the application design method used was a waterfall. The system development method used in this research is Netbeans IDE with Java programming language and Mysql as database storage and iReport to design financial statements.The results obtained from the analysis and design carried out is an accounting information system design that is able to support the operational needs of Cooperative. The superiority of the resulting system is that there is a treasurer who specifically manages the finances of the Cooperative so that the process of recording financial reporting runs effectively and efficiently which has been designed according to the needs of Cooperative

Expansion Joints, status and development

2018 ◽  
Author(s):  
Jørgen Højris Jensen
Keyword(s):  
Life Span ◽  
Basic Material ◽  
Functional Requirements ◽  
Expansion Joint ◽  
Noise Emission ◽  
Expansion Joints ◽  
Maintenance Costs ◽  
Bituminous Materials ◽  
Entire Structure ◽  
General Work

<p>An appropriate design and correct installation of expansion joints are key crucial for the costs and the life span of the entire structure. As no joint types have a life expectancy similar to the life span of the structure (100-120 years), focus needs to be on choosing joint types with minimal maintenance costs combined with the lowest number of and simplest solution for exchange.<p> Many considerations must be taken when choosing types of expansion joints for a new or existing bridge. Most importantly, the functional requirements like movement capacity, traffic volume and type, noise emission etc. must be observed.<p> The details of the joint type and the details of the bridge area around the expansion joints are important as well considering maintenance costs and ultimately the life span of the bridge.<p> Cases with the most common types of expansion joints are used to look at challenges with life span, maintenance, observation of faults and leaks and consequential damages.<p> New editions of flexible plug joints including new basic materials have reached market in the last couple of years. Instead of the traditional bituminous materials the new expansion joint is ETA approved based on polyurethane. Basic material characteristics are described alongside the detailed geometry and installation options. Material requirements in the ETAG 032-3 Flexible Plug Joints are also described.<p> In November 2017 new general work descriptions for flexible plug joints were published. Requirements and expectations for life span are discussed. Furthermore, the first experiences with the incorporation of polymeric plug joints are evaluated focusing on projecting and execution related challenges.

Bridge Bearings and Expansion Joints

1971 ◽  
Author(s):  
David J Lee ◽  
G Maunsell ◽  
Partners ◽  
Kent ◽  
UK
Keyword(s):  
Expansion Joints ◽  
Bridge Bearings

Some remarkable integrals derived from a simple algebraic identity

2013 ◽  
Vol 97 (539) ◽  
pp. 205-209
Author(s):  
Graham J. O. Jameson ◽  
Timothy P. Jameson
Keyword(s):  
Definite Integral ◽  
Algebraic Identity ◽  
Special Cases ◽  
Long Time ◽  
Comprehensive Survey ◽  
Image Position ◽  
The Way

The identity in question really is simple: it says, for u ≠ −1,We describe two types of definite integral that look quite formidable, but dissolve into a much simpler form by an application of (1) in a way that seems almost magical.Both types, or at least special cases of them, have been mathematical folklore for a long time. For example, case (10) below appears in [1, p. 262], published in 1922 (we are grateful to Donald Kershaw for showing us this example). However, they do not seem to figure in most books on calculus except possibly tucked away as an exercise The comprehensive survey [2] mentions the second type on p. 253, but only as a lemma on the way to an identity the authors call the ‘master formula’ We come back to this formula later, but only after describing a number of other more immediate applications.

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