Reliabilitybased design of utility pole structures among other useful features, this manual demonstrates how poles differing in material can be designed to equivalent reliability levels, provides means for quantifying adjusting reliability, offers design incentives for more reliable poles, and facilitates innovation and introduction of new. The purpose of reliability based design rbd is to design structures to. Pole testing ensures high reliability and long life. Structural reliability r f s x e s between strength r and. With its technically innovative subject matter and detailed design examples, this manual will benefit pole manufacturers as well as electrical, structural, and. System reliability analysis of transmission lines h. Based on the raw scores, student a would receive a grade of 2. Reliabilitybased capacity design for reinforced concrete. Reliability analysis of pole type transmission structures 337 moe. Chapter 6 reliability based design and code developments 6. Hydroquebec made a presentation on this project and this technique at the cea technologies conference workshop on utility pole structures held in winnipeg, canada, in june 2002. Angle structures, which will consist of one pole or two pole structures, will be installed on concrete caisson foundations.
The objective of this book is to provide the reader with a practical tool for reliability analysis of structures. Reliabilitybased design of engineered wood structures. Chapter 6 reliabilitybased design and code developments 6. Reliabilitybased design of utility pole structures mop 111. One of the next documents to discuss design loads for transmission lines was some. The reliabilitybased structural design formats are more flexible and rational than their counterparts, the working stress formats, because they provide consistent levels of safety over various. Numerous organizations are involved in the development of national or regional cades without the benefit of interchange of ideas and methodologies. Requester means a licensee or utility that applies to an owner to make attachments to or in the owners facilities and that has an agreement with the owner establishing the rates, terms, and. Among other useful features, this manual demonstrates how poles differing in material can be designed to equivalent reliability levels, provides. In future editions, it is planned to expand this document to cover srbd for other types of utility structures, com ponents and related load. Chapter 6 reliabilitybased design and code developments. Table of contents for reliabilitybased design of utility. Jul 31, 2014 a brief introduction to utility poles.
This manual requires grade b construction for lines 35kv and. In this paper, a robust approach for the approximate solution of reliability based optimal design problems for series structural systems is developed. Reliabilitybased design rbd procedures for engineered structures are being developed and quickly gaining acceptance by cade agencies throughout the world. Basis of structural design for buildings and public works. Reliabilitybased design of utility pole structures, mop 111, provides stateof theart technical information on the design of utility pole structures. The lrfd load and resistance factor design format of rbd is used by the aashto specifications, and the major developments relevant to pile design in general and dynamic testing in particular will be presented. Reliability analysis of poletype transmission structures. Probability of failure can be defined as or, using reliability f r r, f s s s, r t e x t p d f o f f a i l u r e r s t e x t t e x t t e x t t e x t t e x t t e x t t e x tt te t text ex t xt t f s s f r r f r. Table of contents for reliability based design of utility pole structures. Handbook manual guide by american society of civil engineers, 08302006. Steel monopoles were not a common structure type in this era.
An inherent fe ature of design concerned with performance in the field, as opposed to quality of production conformance to design specs definition reliability is the probability that a system will perform in a satisfactory manner for a given period of time. Structural reliabilitybased design of utility poles and the. Reliability based design of utility pole structures mop 111 handbook manual guide by american society of civil engineers, 08302006. When the owner is an electrical company as defined in rcw 80. The new structures for the 230 kv segments will be selfweathering tubular steel tangent structures equipped with upswept arms 3 and installed on concrete caisson foundations. Reliabilitybased design of engineered wood structures in. The 2002 edition of the national electrical safety code provides basic safety rules for outdoor electric power and telecommunications lines and structures. Reliabilitybased design of utility pole structures civil. Pdf reliability based design of utility poles and nesc. Reliabilitybased design of utility pole structures provides stateof theart technical information on the design of utility pole structures. Reliabilitybased design guidelines for fatigue of ship. The appendixes 4 and 5 about the reliability software packages proban and strurel are not included in the second edition.
Conference proceedings of the society for experimental mechanics series. Asce mop 1112006 reliabilitybased design of utility. This internet publication is the second edition of structural reliability methods and is a corrected and slightly revised version of the. Applied sciences, vol 215 by jozsef bodig, nato advanced research workshop on reliabilitybased design of enginee and a great selection of related books, art and collectibles available now at. Reliabilitybased design of utility pole structures books. Reliabilitybased design of utility pole structures asce. Prepared by the reliability based design committee of the structural engineering institute of asce. The concepts, inspection techniques and management methods described here are based on. Stanford libraries official online search tool for books, media, journals, databases, government documents and more. This paper will provide a brief overview of the rules applicable to utility poles, summarize recent events and commission proceedings involving utility poles, and recommend opportunities for additional commission action to protect safety and continuity of service in california. The longterm survival probability and reliability index design of particular and structural members are based on the unsophisticated method of transformed conditional probabilities. It is the responsibility of the pole suppliers to provide the parameters and supporting documentation for their poles strengths, but it is the responsibility of the design engineer. The nesc specifies overload factors and strength factors in its strength and loading rules for. Lu department of civil engineering, university of maine, orono, me 04469, usa structural system reliability analysis of transmission lines is a useful tool in designing new lines and in evaluating or uprating existing lines.
Structural reliability analysis documents reliability design and safety assessment of structure. This basis of structural design for buildings and public works covers structures in general and provides the basic direction for establishing and revising technical standards related to structural design. Rohn uses power line systems software coupled with rohndeveloped software for the design of tubular structures and foundations. The key elements of reliability based design methods are emphasized and probabilistic design concepts of. In principle, this basis of structural design requires explicit treatment of. Table of contents for reliabilitybased design of utility pole structures. Reliability based design of pile foundations 2 context of current design paradigm. Reliability based design accounts for uncertainties scientifically whereas, deterministic design does not rbd assigns a specific reliability on a design through pf probability of failure it is not bad for a system to have probability of failure, but bad not to know how much. This stamp of quality is present on all of our utility structures. Pole attachments best practices euci conference 2020 in. Reliability based design of utility pole structures,isto provide a design methodology for distribution and transmission pole structures that yields relatively consistent reliabilities across all materials.
Reliability based design of utility pole structures provides state of theart technical information on the design of utility pole structures. The basic concept of design is that a successful design provides r. The presented material is intended to serve as a textbook for a one semester course for undergraduate seniors or graduate students. Applied sciences, vol 215 by jozsef bodig, nato advanced research workshop on reliability based design of enginee and a great selection of related books, art and collectibles available now at. Utility poles learn about rohn traffic poles and engineered. Among other useful features, this manual demonstrates how poles differing in material can be designed to equivalent reliability levels, provides means for quantifying adjusting reliability, offers design incentives for more reliable poles, and. System reliability analysis of transmission lines sciencedirect. Reliabilitybased design of utility pole structures,isto provide a design methodology for distribution and transmission pole structures that yields relatively consistent reliabilities across all materials. Based on monte carlo simulations, fragility assessment of the polewire system is performed for two cases. Reliabilitybased design in civil engineering in searchworks. Pdf the 2002 edition of the national electrical safety code provides basic safety. Reliability analysis of poletype transmission structures 337 moe. This discussion looks to define the best means of communication between government, carrier companies, and the utilities as more collaboration crosses the industry. The reliability based structural design formats are more flexible and rational than their counterparts, the working stress formats, because they provide consistent levels of safety over various.
The approach reformulates the problems by replacing reliability terms with deterministic functions. Limit state design principles for various line components security classes and design working life more detailed coverage on electrical design and earthing using eg0 risk based earthing approach covers steel lattice, steel poles, concrete poles, wood poles and crossarms handbook hb331 published april 2012. It occurred to many utility engineers that nesc rule 250b was not providing consistent levels of. Among other useful features, this manual demonstrates how poles differing in material can be designed to equivalent reliability levels, provides means for quantifying adjusting reliability, offers design. Reliabilitybased design of utility pole structures mop 111 handbook manual guide by american society of civil engineers, 08302006. The analysis of revised reliability indices for structures subjected to fixed values of abnor. The calculation of safety 7 factors is referred to as pole loading. In fact, based on the tscores, student as overall performance would be judged to be a little better than student bs. Reliabilitybased design accounts for uncertainties scientifically whereas, deterministic design does not rbd assigns a specific reliability on a design through p f probability of failure it is not bad for a system to have probability of failure, but bad not to know how much rbd tries to keep p f within a target level. Reliability based design of utility pole structures provides stateoftheart technical information on the design of utility pole structures. Reliability based design accounts for uncertainties scientifically whereas, deterministic design does not rbd assigns a specific reliability on a design through p f probability of failure it is not bad for a system to have probability of failure, but bad not to know how much rbd tries to keep p f within a target level. This allows rohn to optimize utility pole designs based on customer requirements, manufacturing efficiencies, and material availability. May 29, 2017 reliability based design of utility pole structures provides state of theart technical information on the design of utility pole structures.
Pole owners and pole attachers must collaborate to implement flat rate billing structures, range of design options, third party program managers and demonstration sites. Based on monte carlo simulations, fragility assessment of the pole wire system is performed for two cases. Structural reliabilitybased design of utility poles and the national. Reliability assessment of electrical overhead distribution. Reliabilitybased design of utility pole structures. Reliabilitybased design of utility pole structures provides stateoftheart technical information on the design of utility pole structures.
These design methods were developed according to the following requirements. According to the current development of reliability. Reliability based design of engineered wood structures. Asce mop 1112006 reliabilitybased design of utility pole. First, we trace the growth of the wood pole industry in response to rapidly. In this paper, a robust approach for the approximate solution of reliabilitybased optimal design problems for series structural systems is developed. This paper presents an overview of reliability based pile design methodology subjected to static and dynamic loads. Structural reliability structural limit states are often defined as a difference between strength r and load s. Reliability based capacity design for reinforced concrete bridge structures. Q, while failure occurs for r of overlap of the two pdfs is related to the pf. Reliability based design of utility pole structures among other useful features, this manual demonstrates how poles differing in material can be designed to equivalent reliability levels, provides means for quantifying adjusting reliability, offers design incentives for more reliable poles, and facilitates innovation and introduction of new.
Ce 810 reliabilitybased design in civil engineering. Pls pole is a powerful and easy to use microsoft windows program for the analysis and design of structures made up of wood, laminated wood, steel, concrete and fiber reinforced polymer frp poles or modular aluminum masts. Reliabilitybased design of engineered wood structures nato. Reliabilitybased design of utility pole structures manual to determine appropriate.
561 526 592 1523 430 53 1255 1430 1332 417 1116 171 1534 1246 599 1255 693 343 1495 836 1601 1290 1088 759 1180 39 1250 748 1280 510 1315 976 421 132 221 1494 423 1133