Maintenance strategies for large span suspension bridges against fatigue and corrosion

Like all other civil engineering structures, suspension bridge is subjected to long-term formidable environment, such as fatigue and corrosion. After its open to traffic, degradation and damage of its components appear in suspension bridges, which cause the reduction of bearing capacity and reliability of suspension bridges. Therefore, the service safety of suspension bridges is a topic of importance, particularly for its managers. This paper provides maintenance strategies for managing and maintaining the structural safety of suspension bridge in a life cycle framework in order to rationalize maintenance actions, economically.

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Safety assessment and life-circle management of large-span steel suspension bridges in its design lifetime

Bridge Maintenance, Safety, Management and Life Extension ◽

10.1201/b17063-27 ◽

2014 ◽

pp. 215-225

Author(s):

Y Zeng ◽

A Chen ◽

R Ma ◽

H Tan ◽

J Ren

Keyword(s):

Safety Assessment ◽

Suspension Bridges ◽

Large Span ◽

Life Circle

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Study on Seismic Response Control of Self-Anchored Suspension Bridge with TMD

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.351-352.1293 ◽

2013 ◽

Vol 351-352 ◽

pp. 1293-1297

Author(s):

Lian Zhen Zhang ◽

Tian Liang Chen ◽

Wei Xiong

Keyword(s):

Seismic Response ◽

Lateral Displacement ◽

Suspension Bridge ◽

Response Analysis ◽

Suspension Bridges ◽

Seismic Action ◽

Response Control ◽

Large Span ◽

Seismic Response Control ◽

The Moment

Large span self-anchored suspension bridges which are located in the strong earthquake zone often have no sufficient anti-seismic capacity, especially the bridge pylon. Therefore, seismic response control is necessary. This paper studies the lateral damping control effects of one large-span self-anchored suspension bridge with tuned mass damper (TMD). Using a spatial dynamic analysis finite element mode, the seismic responses are calculated out. Seismic response analysis results show that a large lateral displacement appeared at the pylon top under the lateral seismic action and the moment peak at the pylon bottom is nearly reaching its equivalent yield moment gotten by moment-curvature curve, which would be resulted in a high risk of collapse of self-anchored suspension bridge under lateral earthquake action. Therefore, one TMD is considered to be applied on the pylon top of the self-anchored suspension bridge to reduce the seismic response. The simulation result shows that the TMD can provide remarkable effect on seismic response control of the pylon. The control efficiency of TMD can be up to 23.4%. The moment at the pylon bottom and the displacement at the pylon top both decrease obviously. The parameter analyses of TMD are also performed to get the best design parameter. The research results can be used as the reference of seismic response control or anti-seismic design for the same type of bridge.

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Approximate expression of fundamental frequencies of large-span suspension bridges

2011 International Conference on Electric Information and Control Engineering ◽

10.1109/iceice.2011.5778109 ◽

2011 ◽

Author(s):

Guanmo Xie

Keyword(s):

Approximate Expression ◽

Suspension Bridges ◽

Large Span ◽

Fundamental Frequencies

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Translucent Glass Roofs For Large-Span Coverings

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2019.06.23-28 ◽

2019 ◽

pp. 23-28

Keyword(s):

Warm Season ◽

Natural Light ◽

Labor Costs ◽

Main Bearing ◽

Large Span ◽

Glass Panels ◽

Technical Properties ◽

Internal Volume ◽

Basic Approaches ◽

Smoke Removal

The article deals with the issues of glass use in the enclosing structures of large-span coverings, which have such advantages as ensuring the penetration of natural light, tightness, minimum labor costs for repair and maintenance. Design shortcomings: the high cost, the need for protection of the internal volume against the penetrating sun rays in the warm season (hothouse effect); arrangement of devices for operation of a roof. The key technical properties and characteristics of glass panels and pane-glass sets, constructive decisions, including interface to the main bearing structures of a large-span covering are given. Peculiarities of their design with due regard for ventilation and smoke removal, a drainage of condensate, ways of fight against frosting and snow drifts on the roof are reflected. Features of the account of loadings, the basic approaches to their calculation are considered. Various design solutions for the spatial metal trussed systems with the original nodal connections are presented. Information on modern solutions of translucent roofs using glass for large-span coverings is given.

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Control of Vibrations due to Moving Loads on Suspension Bridges

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2006.11.3.14749 ◽

2006 ◽

Vol 11 (3) ◽

pp. 293-318 ◽

Cited By ~ 4

Author(s):

M. Zribi ◽

N. B. Almutairi ◽

M. Abdel-Rohman

Keyword(s):

Bridge Deck ◽

Suspension Bridge ◽

Lyapunov Theory ◽

Dynamic Responses ◽

Suspension Bridges ◽

Control Force ◽

Moving Loads ◽

Hydraulic Actuator ◽

Long Span ◽

Suspended Cables

The flexibility and low damping of the long span suspended cables in suspension bridges makes them prone to vibrations due to wind and moving loads which affect the dynamic responses of the suspended cables and the bridge deck. This paper investigates the control of vibrations of a suspension bridge due to a vertical load moving on the bridge deck with a constant speed. A vertical cable between the bridge deck and the suspended cables is used to install a hydraulic actuator able to generate an active control force on the bridge deck. Two control schemes are proposed to generate the control force needed to reduce the vertical vibrations in the suspended cables and in the bridge deck. The proposed controllers, whose design is based on Lyapunov theory, guarantee the asymptotic stability of the system. The MATLAB software is used to simulate the performance of the controlled system. The simulation results indicate that the proposed controllers work well. In addition, the performance of the system with the proposed controllers is compared to the performance of the system controlled with a velocity feedback controller.

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