TY - CHAP A1 - Cheung, Moe M. S. A1 - Noruziaan, Bahman A1 - Li, W. C. T1 - Data acquisition, processing and management systems for a Canadian bridge monitoring project N2 - This paper will present a number of technical aspects for one of the most elaborate instrumentation and data acquisition projects ever undertaken in Canada. Confederation Bridge, the longest bridge built over ice covered seawater has been equipped with the state of the art data acquistition devices and systems as well as data transfer networks. The Bridge has been providing a fixed surface connection between Prince Edward Island and Province of New Brunswick in Canada since its opening in 1997. The Bridge has a rather long design service life of 100 years. Because of its large size and long span length, its design is not covered by any existing codes or standards worldwide. The focus of the paper is to introduce the data acquisition, transfer, processing and management systems. The instrumentation and communications infrastructure and devices will be presented in some details along with the data processing and management systems and techniques. Teams of engineers and researchers use the collected data to verify the analysis and design assumptions and parameters as well as investigate the short-term and long-term behaviour and health of the Bridge. The collected data are also used in furthering research activities in the field of bridge engineering and in elevating our knowledge about behaviour, reliability and durability of such complex structures, their components and materials. KW - Bauwerk KW - Datenmanagement KW - Brückenbau Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-1235 ER - TY - CHAP A1 - Melhem, Hani A1 - Cheng, Yousheng T1 - Numeric Prediction Algorithms for Bridge Corrosion N2 - The research reported in this article was conducted to mainly explore the two common numeric prediction techniques, the model tree and the regression tree, when used in conjunction with bagging as a wrapper method. Bagging is used to improve the prediction accuracy of these two algorithms, and results are compared with the ones obtained earlier by the k-nearest neighbor (KNN) algorithm. From the conducted experiments, both the bagged regression tree and bagged model tree produce better results than not only their corresponding regression tree and model tree alone, but also the KNN with optimal value of k equal to 7. In addition, the bagged model tree yields the lowest prediction errors and a highest correlation coefficient of 0.81. It is demonstrated that it is feasible to use the bagged model tree for engineering applications in prediction problems such as estimating the remaining service life of bridge decks. KW - Hochschulbildung KW - Entscheidungsunterstützung KW - Brückenbau KW - Korrosion KW - Prognose Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-1982 ER - TY - CHAP A1 - Jian Ming, Lu A1 - Ke, Chen T1 - Information technology used in highway and bridge engineering N2 - With the speedy development of transportation of China, especially construction of many high-grade highways, some information technology successes have been achieved in the highway and bridge engineering, such as survey, design, construction and maintenance etc. In this paper, some applications about information technology in the highway engineering were introduced and some bridge professional software developed by RIOH (Research Institute Of Highways) in recent years was also introduced. KW - Mobile Computing KW - Funknetz KW - Straßenbau KW - Brückenbau Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-1114 ER - TY - CHAP A1 - Sampaio, Alcinia Zita T1 - Definition of a bridge deck geometrical modelling process to automate design graphical representations N2 - The construction of a new building interferes with the existent environment. A careful aesthetic study must be made at an early stage in the design and the visualization of a three-dimensional (3D) model of the structure is the best way to analyse it. As some structures presents a complex shape is difficult to execute a 3D model as well as the specific drawings. Using traditional graphical systems, the execution of deck specific drawings is extremely time consuming and the 3D deck model gives an approximation only of the exterior shape of the deck. The modelling scheme proposed here allows the automation of the geometric design phases related to the deck bridge element using as a means of integration a geometric database representative of the real deck shape. This concept was implemented in a computer program. This application is an important support in the process design namely at the conceptual and graphical stages. The computer application provides an important tool to the bridge designer particularly at the conceptual stage, as it allows aesthetic and structural evaluation of the bridge at an early stage in the design. The geometric modelling process and graphical results of a case study are presented. KW - Brückenbau KW - CAD KW - Dreidimensionales Modell Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-3575 ER - TY - CHAP A1 - Schneider, Lothar T1 - Abbruch der Teufelstalbrücke – Herausforderungen mit Risiko N2 - Anlass zum Abriss der Brücke; Das abzubrechende Bauwerk; Vorgaben für den Abbruch (gemäß der Ausschreibung, aus statischer Sicht, aus Arbeitsschutzgründen); Abbruch der Aufbauten und der Fahrbahnplatte (Abbruch der Aufbauten, Problem Festpunkt Bogenscheitel – Fahrbahn, Abbruch Plattenbalken und Pfeilerscheiben); Abbruch der Bögen (Abbruchgerüst, Scheitelöffnung, Bogenrückbau, Kontrollsystem). Noch nie zuvor war in Deutschland eine Bogenbrücke auf diese Art und Weise abgebrochen worden. Maßgeblich für das Gelingen des schwierigen Rückbaus der Teufelstalbrücke war das Verantwortungsbewusstsein der Beteiligten im Zusammenhang mit der notwendigen Risikobereitschaft, aber auch mit der Vermeidung unnötiger Restrisiken schon von vornherein. Zur Risikominimierung trugen die gute Organisation des Vorhabens, regelmäßige gemeinsame Baustellenbegehungen mit Vertretern der für Sicherheit zuständigen Institutionen (Amt für Arbeitsschutz Gera, Bau-Berufsgenossenschaft, Sicher-heits- und Gesundheitsschutzkoordinator) sowie die technische Ausstattung bei. All dies führte letztendlich zum Erfolg einer Maßnahme, bei der man den bisherigen Erfahrungsbereich verlassen musste. KW - Arbeitsschutz KW - Baustelle KW - Baubetriebslehre KW - Abbruch KW - Brückenbau Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-4722 ER - TY - CHAP A1 - Hörnig, Wolfgang T1 - Moderne Fertigungsmethoden im Brückenbau am Beispiel der Bogenherstellung über die Wilde Gera N2 - Es werden die Erfahrungen der Adam Hörnig Baugesellschaft bei der Bogenherstellung im Freivorbau einer Autobahnbrücke beschrieben. KW - Baustelle KW - Brückenbau KW - Freivorbau Y1 - 2000 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-6994 ER -