The main cables of a suspension bridge are the primary. To purchase this ebook for personal use, or in paperback or hardback format. New products for maintaining the cables and extending the expected service life of the bridge are being utilized by owners of suspension bridges throughout the world. Due to their attractiveness and visibility, they are wellknown. This paper presents the results of the inspection, sampling and testing of the cable of three suspension bridges in the usa, and discusses the programmes for rehabilitating their cables. After the first thirty years of the bridge s life the main cables should be unwrapped and the interior wires or strands. Trbs national cooperative highway research program nchrp synthesis 354. Macdonald, midhudson, shantou bay, and kingstonport ewen bridges.
Bridge maintenance inspection and evaluation, second. Scoping bridge maintenance work requires understanding the process of inspection and evaluation to understand the contexts of. Inspection and strength evaluation of concrete highway bridges in czechoslovakia. Bridge structures form a major part of the vast financial investment in infrastructure. Inspection, evaluation and maintenance of suspension bridges case studies gives detailed case studies of the manhattan, akashi kaikyo, tsing ma, storeb.
Readers are likely to especially appreciate both the quantity and. This text is written to those involved in scoping, scheduling, and preparing plans for bridge maintenance work. Inspection, evaluation and maintenance of suspension bridges case studies book. Focus extending the service life of suspension bridge. Transit new zealand bridge inspection and maintenance manual 2001 page 41. Bridge maintenance inspection and evaluation, 2nd edition.
Guidelines for inspection and strength evaluation of suspension bridge parallel wire cables offers recommendations for the inspection and strength evaluation of suspension bridge parallelwire cables. Given that visual inspection is vital when evaluating the condition of bridges, it plays a crucial role in planning the special maintenance works. The last five years have seen the art of bridge management develop into a mature subject. Comparison of visual inspection and structuralhealth. Office of bridges and structures bridge inspection manual issue date. Movable bridge inspection, evaluation, and maintenance manual research agency. Inspection, evaluation and maintenance of suspension bridges. Inspection, evaluation and maintenance of suspension bridges is written by the bridge owners and practitioners who strive to costeffectively manage these bridges. Inspection and maintenance of suspension bridge cables requires specialized expertise. It is a source of reference for planning, estimating, and technical accomplishment of maintenance and repair work and may serve as a training manual for facilities maintenance personnel in the army and air force engaged in maintenance inspection and repair of bridges. Inspection of bridge bearings birm ced engineering. Inspection, evaluation and maintenance of suspension bridges case studies alampalli, sreenivas, moreau, william j. Normally, visual inspections including 100 percent handson inspection of fracturecritical fatigue prone details are done for structural evaluation of critical components of a suspension bridge. They include recommendations on when to inspect, where.
Integrating bridge structural health monitoring and. Design of a bridge inspection system bis to reduce time. Doi link for inspection, evaluation and maintenance of suspension bridges case studies. It is invaluable to everyone interested not only in suspension bridges but in the upkeep of any bridges.
Inspection, evaluation and maintenance of suspension. Evaluation of suspension bridge main cables inspection. The wisconsin department of transportations bridge inspection field manual builds on the element level condition assessment methods developed in the aashto manual for bridge element inspection, 1st edition, 20. However, since implementation of the national bridge inspection standards in 1971, a complete study of the reliability of visual inspection, as it relates to highway bridge inspection, has not been undertaken. The aashto manual for bridge evaluation mbe, section 4. The main cables of existing suspension bridges have been found to have heavily corroded and broken wires, in spite of good maintenance traditional cable protection systems alone paste, wrapping wire and paint have not provided adequate corrosion protection water is clearly driving the deterioration process. Recently, the nchrp has published more detailed guidelines focused on the inspection and evaluation of parallel wire suspension cables. Now, influenced by bmss, owners are beginning to emphasize costeffective proactive strategies from the start, when the bridge is new. Inspection, evaluation and maintenance of suspension bridges case studies gives detailed case studies of the manhattan, akashi kaikyo, tsing ma, storebaelt east, forth road, bronxwhitestone, george washington, angus l. The bridge preservation process consists of three activities. Inspection, evaluation and maintenance of suspension bridges 1st.
Tension drop in cableband bolts on suspension bridges. Ritter, structural engineer united states department of agriculture. Inspection, evaluation, and monitoring of suspension. Suspension bridge cable evaluation and maintenance c. Seminar report on cable suspension bridge to be submitted in partial fulfilment of the requirement for the degree of bachelor of technology in civil engineering under the guidance of dr.
The three primary functions of a bridge bearing are. Visual inspection in evaluation of bridge condition. American association of state highway and transportation officials. Evaluation and maintenance of suspension bridges case studiessreenivas alampalli, william j. Bridge maintenance inspection and evaluation, second edition presents new and expanded information on condition ratings, capacity evaluations, load factor analysis, and the american association of state highway and transportation officials aashto suggested guidelines. Inspection, evaluation and maintenance of suspension bridges sreenivas alampalli, william j. Guidance on protecting and extending the life of suspension bridges. Jyoti prasad professor department of civil engineering, college of technology submitted by. A companion cdrom provides details of the research program undertaken to develop. The aashto manual for bridge evaluation 6 provides a methodology for load rating a. Cable dehumidification systems for suspension bridges. It is invaluable to everyone interested not only in suspension bridges but in the upkeep of any bridgesstudents, designers, maintenance personnel, contractors, and owners. Primer for the inspection and strength evaluation of suspension.
Inspection and management of bridges with fracturecritical details explores the inspection and maintenance of bridges with fracturecritical members fcms, as defined in the american association of state highway and transportation officials load and resistance factor design lrfd bridge. These guidelines include inspection protocols and techniques for the capacity evaluation of the cables. Parsons brinckerhoff project complete final report issued and posted on trb website aashto committee on bridges and structures adopted manual on june 29, 2016 aashto movable bridge inspection, evaluation, and maintenance manual, 2nd edition. The federal highway administrations nde validation center. Each of these chapters is written by those responsible for the maintenance and operation of many of the worlds most wellknown suspension bridges and is intended to address one major aspect of the design, inspection, evaluation, and maintenance of suspension bridges. Manual for maintenance inspection of bridges, 1978. Candidate, department of engineering, university of cambridge, uk. Inspection, evaluation and maintenance of suspension bridges, and. Ohio department of transportation manual of bridge inspection. It was found from field surveys that cables were heavily corroded in japanese suspension bridges, which were under severe corrosion environments due to the. Guidelines for inspection and strength evaluation of.
In the united states, the federal highways administration fhwa has introduced guidelines for visual inspection of fracturecritical bridge members, including suspension bridge cables. It is invaluable to everyone interested not only in suspension bridges but in the upkeep of any bridges students, designers, maintenance personnel, contractors, and owners. Bridge maintenance an overview sciencedirect topics. Inspection, evaluation, and maintenance of suspension bridges the first book deals with the main aspects to be considered in the inspection, evaluation, and maintenance of suspension bridges and is divided into 12 excellently compiled and easytoread chapters. The nde methods discussed in this paper include visual inspection, eddy current method, radiographic testing, and manual and automated ultrasonic testing.
This paper presents the results of a research project aimed at examining the 6 capabilities and challenges of two distinct but not mutually exclusive approaches to in. Techbrief reliability of visual inspection for highway. Review of inspection, evaluation and maintenance of. Aashto manual for maintenance inspection of bridges. Bridge maintenance, repair, and rehabilitation the repair of bridges often has been a reactive activity, initiated only when deterioration threatens the safety or tolerance of the public. The fhwa requires evaluation of all bridges however. Maintenance and inspection may only prevent such problems from becoming severe. Design, construction, inspection, and maintenance s cover and contents. Inspection, evaluation and maintenance of suspension bridges case studies. Bridge management inspection, maintenance, assessment. Aashto movable bridge inspection, evaluation and maintenance manual by american association of state highway and transportation officials. Evaluation and maintenance of suspension bridges case studies. Office of bridges and structures bridge inspection manual.
Design, construction, inspection, and maintenance michael a. Bridge owners and engineers recognise the importance of implementing fully operational bridge management strategies to ensure that all road and rail bridges remain functional for as long as possible. Guidelines for inspecting complex components of bridges. Maintaining and enhancing the clear style and ease of referral that made the first edition internationally popular, bridge maintenance inspection and evaluation, second edition presents new and expanded information on condition ratings, with comprehensiveelucidations of federal highway administration guidelines on specific components. Inspection and evaluation of bridge bearings topic 9.
Movable bridge inspection evaluation and maintenance manual. The visual inspection method is the predominant nondestructive evaluation technique used for bridge inspection. Chapter 1 of the book provides an excellent overview of suspension bridges, including forms and components of suspension bridges, analysis methods, variations in forms of suspension bridges, and lessons learned from failures of suspension bridges. Many suspension bridges across the country are iconic design structures, but they are also essential transportation links for both communities and commerce, representing a significant investment in the nations infrastructure. Inspection, prevention, and remedy of suspension bridge cable corrosion problems. Evaluation of suspension bridge parallel wire cables, and fhwa report no. Inspection and management of bridges with fracture. Aashto manual for the condition evaluation of bridges, 2000, 2nd edition, through 2003 interims. Suspension bridges are graceful, aesthetic, and iconic structures. Chapter 8 electrical and mechanical page 82 washington state bridge inspection manual m 3664.