Searched for: author%3A%22Lantsoght%2C+E.O.L.%22
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Zarate Garnica, G.I. (author), Lantsoght, E.O.L. (author)
Existing bridges with large uncertainties can be assessed with proof load tests. In such tests, a load representative of the factored live load is applied to the structure. If the bridge can carry the load without any signs of distress or nonlinearity, the test is considered successful. Since large loads are applied in proof load tests, the...
conference paper 2020
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Granda Valencia, Camilo (author), Lantsoght, E.O.L. (author)
This paper provides a practical example of the torsion design of an inverted tee bent cap of a three-span bridge. A full torsional design following the guidelines of the ACI 318-19 building code is carried out and the results are compared with the outcomes from CSA-A23.3-04, AASHTO-LRFD-17, and EN 1992-1-1:2004 codes. Then, a summary of the...
conference paper 2020
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Benítez C., Kevin S. (author), Lantsoght, E.O.L. (author)
The design of a cast-in-place, post-tensioned concrete, multi-cell box girder bridge under combined torsion, shear, and flexure is presented in this example. The bridge covers three spans of different lengths, supported by two abutments and two bents; its cross-section consists of three 12 ft (3.7 m) lanes, two 10 ft (3.0 m) shoulders, and two...
conference paper 2020
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Sousa, Alex (author), Lantsoght, E.O.L. (author), El Debs, Mounir K. (author)
Most models of shear strength used to estimate the shear capacity of wide reinforced concrete members without shear reinforcement do not take into account the structural system or the support conditions. However, some experimental results indicate that bending moment can have a positive influence on members with predominant flexural action,...
conference paper 2020
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Abambres, Miguel (author), Lantsoght, E.O.L. (author)
According to the current codes and guidelines, shear assessment of existing reinforced concrete slab bridges sometimes leads to the conclusion that the bridge under consideration has insufficient shear capacity. The calculated shear capacity, however, does not consider the transverse redistribution capacity of slabs, and thus leads to overly...
journal article 2020
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de Sousa, AlexM.D. (author), Lantsoght, E.O.L. (author), El Debs, Mounir K. (author)
The calibration of most analytical models that assess the shear strength of wide reinforced concrete members without shear reinforcement is based on simply supported beam tests, which may not be representative of slabs and wide members failing in shear. This paper addresses the knowledge on the shear strength of wide members, identification of...
journal article 2020
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Zhang, F. (author), Zarate Garnica, G.I. (author), Yang, Y. (author), Lantsoght, E.O.L. (author), Sliedrecht, Henk (author)
In the Netherlands, many prestressed concrete bridge girders are found to have insufficient shear–tension capacity. We tested four girders taken from a demolished bridge and instrumented these with traditional displacement sensors and acoustic emission (AE) sensors, and used cameras for digital image correlation (DIC). The results show that AE...
journal article 2020
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Overgaard Christensen, Christian (author), Lantsoght, E.O.L. (author), Wittrup Schmidt, Jacob (author)
Advanced crack monitoring is crucial for high precision response- and threshold evaluation when performing proof- and diagnostic load tests on existing concrete structures. Mostly, crack monitoring techniques involve one monitoring method, which provide thresholds with regard to stop criteria and characterization information. In the ongoing...
conference paper 2019
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Lantsoght, E.O.L. (author)
This chapter deals with the methodology for proof load testing. All aspects of proof load testing that are shared with other load testing methods have been discussed in Part II of Volume 12. In this chapter, the particularities of proof load testing are discussed. These elements include the determination of the target proof load, the procedures...
book chapter 2019
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Lantsoght, E.O.L. (author), Schmidt, J.W. (author)
This chapter discusses the aspects related to the preparation of load tests, regardless of the chosen type of load test. After determination of the test objectives, the first step should be a technical inspection of the bridge and bridge site. With this information, the preparatory calculations (assessment for existing bridges and expected...
book chapter 2019
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Lantsoght, E.O.L. (author)
This chapter introduces the general topic of load testing of structures. In this chapter, the reader can find a short background to the topic of load testing of structures, the scope of this book, the aim of this book, and a short discussion of the structure and outline of this book.
book chapter 2019
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Lantsoght, E.O.L. (author)
This chapter brings all information from the previous chapters together and restates the main topics that have been covered in this book. The topics to which more research energy has been devoted and the remaining open questions are discussed. Based on the current knowledge and state of the art, as well as the practical experiences presented by...
book chapter 2019
document
Lantsoght, E.O.L. (author)
This chapter reviews the existing codes and guidelines for load testing of structures. A summary of the main requirements of each existing code is provided, with a focus on the determination of the required load and measurements. The requirements for load testing of bridges and buildings are revised, for new and existing structures. An...
book chapter 2019
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Lantsoght, E.O.L. (author), Hordijk, D.A. (author), Koekkoek, R.T. (author), van der Veen, C. (author)
This chapter describes the proof load testing of viaduct Zijlweg at a position that is critical for bending moment and at a position that is critical for shear. The viaduct Zijlweg has cracking caused by alkali-silica reaction, and the effect of material degradation on the capacity is uncertain. Therefore, the assessment of this viaduct was...
book chapter 2019
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Frangopol, Dan M. (author), Yang, David Y. (author), Lantsoght, E.O.L. (author), Steenbergen, Raphaël D.J.M. (author)
This chapter reviews concepts related to the uncertainties associated with structures and how the results of load tests can be used to reduce these uncertainties. When an existing bridge is subjected to a load test, it is known that the capacity of the cross section is at least equal to the largest load effect that was successfully resisted. As...
book chapter 2019
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Lantsoght, E.O.L. (author), Schmidt, J.W. (author)
This chapter discusses aspects that should be considered prior to every load test. The first questions that needs to be answered are “Is this bridge suitable for load testing?” and “If so, what are the goals of the load test?” To answer these questions, information must be gathered and preliminary calculations should be carried out. In order to...
book chapter 2019
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Lantsoght, E.O.L. (author), Bonifaz, J. (author), Sanchez, T.A. (author), Harris, D.K. (author)
This chapter deals with the methodology for diagnostic load testing. All aspects of diagnostic load testing that are shared with other load testing methods have been discussed in Part II. In this chapter, the particularities of diagnostic load testing of new and existing bridges are discussed. These elements include loading procedures,...
book chapter 2019
document
Lantsoght, E.O.L. (author), Schmidt, J.W. (author)
This chapter discusses the aspects related to processing the results of a load test after the test. The way in which the data are processed depends on the goals of the test. As such, the report that summarizes the preparation, execution, and post-processing of the load test should clearly state the goal of the load test, how the test addressed...
book chapter 2019
document
Lantsoght, E.O.L. (author), Schmidt, J.W. (author)
This chapter discusses the aspects related to the execution of load tests regardless of the chosen type of load test. The main elements required for the execution of the load test are the equipment for applying the load and the equipment for measuring and displaying (if required) the structural responses. This chapter reviews the commonly used...
book chapter 2019
document
Lantsoght, E.O.L. (author)
Después de la expansión de la red vial del país, la comunidad de ingenieros civiles y el gobierno tienen un número mayor de puentes existentes a manejar. En el futuro, esos puentes necesitaran mantenimiento y adopciones a los cambios en términos de las cargas vivas. En ese artículo vamos a ver como en Europa y América del Norte se está evaluando...
conference paper 2019
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