Academic literature on the topic 'Bascule bridge'

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Journal articles on the topic "Bascule bridge"

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Dahniel, Dahniel, and F. X. Supartono. "Analisis Deformasi dan Tegangan Pada Bascule Bridge Akibat Pengaruh Sudut Angkat Jembatan." JMTS: Jurnal Mitra Teknik Sipil 3, no. 4 (2020): 1257. http://dx.doi.org/10.24912/jmts.v3i4.8369.

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Bumi sedang menghadapi masalah pemanasan global yang besar sehingga membuat es di kutub mencair dan menambah tinggi muka air, juga mengurangi luas daratan. Dalam mengatasi masalah tersebut dibutuhkan suatu akses yang menghubungkan transportasi darat dan juga transportasi laut, jembatan bergerak merupakan solusi untuk mengatasi masalah tersebut. Jembatan bergerak memiliki banyak jenis, salah satunya adalah jembatan bascule, jembatan bascule adalah jembatan bergerak yang bergerak arah vertikal dan horizontal untuk memberikan akses kendaraan laut dan darat. Jembatan bascule ini menggunakan rangka batang yang biasanya digunakan untuk jalur kereta api, tetapi jembatan kali ini untuk jalur kendaraan beroda. Model Jembatan bascule dibuat dengan menggunakan program Midas Civil menggunakan wizard rangka batang yang bergerak vertikal dengan sudut 0º, 30º, 45º, 60º. Hasil dari analisis menggunakan program Midas Civil menunjukkan bahwa untuk jalur kendaraan beroda, jembatan bascule tipe rangka batang bisa digunakan dengan ketentuan seperti dalam penelitian ini dengan menahan tegangan dan defleksi akibat beban mati dan beban hidup. Kata kunci: Jembatan Bascule, Rangka Batang, Tegangan, Defleksi, Midas Civil. The earth is facing a big problem of global warming that makes the polar ice melt and increase the water level, also reduce the land area. In overcoming this problem, we need an access that connects land transportation and also sea transportation, moving bridges are a solution to overcome these problems. Moving bridges have many types, one of which is the bascule bridge, the bascule bridge is a moving bridge that moves vertically and horizontallyto provide access to sea and land vehicles. This bascule bridge uses truss which is usually used for railroad lines, but this time the bridge is for wheeled vehicles. The bascule bridge model was created using the Midas Civil program using steel wand truss that moves vertically with angles of 0º, 30º, 45º, 60º. The results of the analysis using the Midas Civil program show that for wheeled vehicle lines, the truss type bascule bridge can be used with the provisions as in this study by holding stress and deflection due to dead load and live load. Keywords: Bascule Brdege, Truss, Stress, Deflection, Midas Civil.
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Astiz, Miguel A., Javier Manterola, and Javier Fernandez-Revenga. "Estacio Bascule Bridge, Spain." Structural Engineering International 16, no. 2 (2006): 88–90. http://dx.doi.org/10.2749/101686606777962567.

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Jakobsen, Svein Erik, Dag Ivar Ytreberg, and Jaco Reusink. "New Fredrikstad Bascule Bridge, Norway." IABSE Symposium Report 97, no. 6 (2010): 61–67. http://dx.doi.org/10.2749/222137810796063797.

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Barpi, Fabrizio, and Michael A. B. Deakin. "The Bélidor Bascule Bridge Design." International Journal for the History of Engineering & Technology 82, no. 2 (2012): 159–75. http://dx.doi.org/10.1179/1758120612z.00000000010.

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Cundy, H. Martyn. "The Bascule Bridge: An Unexpected Cardioid." Mathematical Gazette 74, no. 468 (1990): 124. http://dx.doi.org/10.2307/3619354.

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Xu, Weiwei, Hanshan Ding, and Zhitao Lu. "Conceptual design of light bascule bridge." Structural Engineering and Mechanics 29, no. 4 (2008): 381–90. http://dx.doi.org/10.12989/sem.2008.29.4.381.

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Liu, Yun, Xin Yu, and Zhen Dong Qian. "Numerical Study of Dynamic Response of Steel Deck Pavement on the Bascule Bridge." Advanced Materials Research 148-149 (October 2010): 1246–49. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1246.

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The bascule bridge is one of the most suitable bridge types for ports and rivers in cities. In order to discuss the mechanical behavior of the pavements in the opening process, the finite element model of the pavement system on the Haihe Bridge being built in Tianjin China was built, and the mechanical response in the opening process was calculated. The research results show that the asphalt paving with the thickness of 30mm~40mm is fit for the bascule bridge. The max shear stresses of pavement between pavement and steel plate in the opening process rise with the increase of Young’s modulus, and the high temperature during the construction and conservation after construction should be provided.
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Yarnold, Matthew, and Jeffrey Weidner. "Monitoring of a bascule bridge during rehabilitation." Bridge Structures 12, no. 1-2 (2016): 33–40. http://dx.doi.org/10.3233/brs-160102.

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Huang, Dongzhou. "Hillsborough River Bascule Bridge Vibration and Rehabilitation." Transportation Research Record: Journal of the Transportation Research Board 2592, no. 1 (2016): 98–107. http://dx.doi.org/10.3141/2592-11.

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Arenas de Pablo, Juan Josü. "La Porta d’Europa Bascule Bridge in Barcelona, Spain." Structural Engineering International 10, no. 4 (2000): 218–20. http://dx.doi.org/10.2749/101686600780481211.

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Dissertations / Theses on the topic "Bascule bridge"

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Snyder, Luke Allen. "Sensitivity analysis of three assembly procedures for a bascule bridge fulcrum." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003243.

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Nguyen, Cuong Q. "A design of experiments study of procedure for assembling bascule bridge fulcrum." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001705.

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Berlin, Michael West. "Innovative procedure to install a trunnion-hub assembly in a bascule bridge girder." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000525.

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Garapati, Sriharsha. "Analytical and Numerical Modeling of Assembly Procedures of Steel Fulcra of Bascule Bridges." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4490.

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To model shrink-fitting in metal components, an analytical model for two long compound cylinders with temperature dependent material properties and interference between them is developed for calculating transient temperatures and stresses. A finite element model is developed for the same geometry which incorporated the temperature dependent material properties. A convergence study is performed on the finite element and analytical model. The finite element model is validated by comparing the approximations of finite element model with the analytical solution. In an assembly procedure of fulcrums for bascule bridges, called AP1, the trunnion is shrink-fitted into a hub, followed by shrink fitting the trunnion-hub assembly into the girder of the bridge. In another assembly procedure called AP2, the hub is shrink-fitted into the girder, followed by shrink-fitting the trunnion in the hub-girder assembly. A formal design of experiments (DOE) study is conducted on both AP1 and AP2 using the finite element model to find the influence of geometrical parameters such as radial thickness of the hub, radial interference, and various shrink-fitting methods on the design parameter of overall minimum critical crack length (OMCCL) - a measure of likelihood of failure by cracking. Using the results of DOE study conducted on both the assembly procedures, AP1 and AP2 are quantitatively compared for the likelihood of fracture during assembly. For single-staged shrink-fitting methods, for high and low hub radial thickness to hub inner diameter ratio, assembly procedure AP1 and AP2 are recommended, respectively. For fulcra with low hub radial thickness to hub inner diameter ratio and where staged shrink-fitting methods are used, for AP2, cooling the trunnion in dry-ice/alcohol and heating the girder, and for AP1, cooling the trunnion-hub assembly in dry-ice/alcohol followed by immersion in liquid nitrogen is recommended. For fulcra with high hub radial thickness to hub inner diameter ratio and where staged shrink-fitting methods are used, cooling the components in dry-ice/alcohol and heating the girder is recommended for both AP1 and AP2. Due to the limitations of AP2, assembly procedures by heating the girder with heating coils instead of dipping an already stressed trunnion-hub assembly in liquid nitrogen are studied for decreasing the likelihood of failure by cracking and yielding. In an assembly procedure called AP3-A, only the girder is heated to shrink-fit the trunnion-hub assembly in the girder. This assembly procedure AP3-A is found to be infeasible because the girder fails by yielding if heating is expected to be completed in a reasonable amount of time. An alternative assembly procedure called AP3-B is suggested for shrink-fitting where the heating of the girder is combined with cooling the trunnion-hub assembly in dry-ice/alcohol mixture. This assembly procedure AP3-B is found to be feasible. A complete DOE study is conducted on AP3-B to find the influence of parameters like hub radial thickness and radial interference at trunnion-hub interface on the design parameter of overall minimum critical crack length. The design parameter, OMCCL values during the assembly procedure AP3-B are quantitatively compared with the widely used assembly procedures (AP1 single-stage shrink-fitting and AP1 multi-staged shrink fitting). The results of this work suggest that increasing the hub radial thickness decreases the likelihood of fracture significantly. For hubs with large radial thickness, heating the girder combined with cooling the trunnion-hub in dry-ice/alcohol mixture (AP3-B) is recommended but for hubs with low radial thickness, multistage cooling of the trunnion-hub assembly in dry-ice/alcohol mixture followed by dipping in liquid nitrogen (AP1- multistage cooling) is recommended.
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Collier, Nathaniel Oren. "Benefit of staged cooling in shrink fitted composite cylinders." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000311.

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Garapati, Sri Harsha. "Analytical and Numerical Modeling of Assembly Procedures of Steel Fulcra of Bascule Bridges." Thesis, University of South Florida, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3557075.

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<p> To model shrink-fitting in metal components, an analytical model for two long compound cylinders with temperature dependent material properties and interference between them is developed for calculating transient temperatures and stresses. A finite element model is developed for the same geometry which incorporated the temperature dependent material properties. A convergence study is performed on the finite element and analytical model. The finite element model is validated by comparing the approximations of finite element model with the analytical solution. </p><p> In an assembly procedure of fulcrums for bascule bridges, called AP1, the trunnion is shrink-fitted into a hub, followed by shrink fitting the trunnion-hub assembly into the girder of the bridge. In another assembly procedure called AP2, the hub is shrink-fitted into the girder, followed by shrink-fitting the trunnion in the hub-girder assembly. A formal design of experiments (DOE) study is conducted on both AP1 and AP2 using the finite element model to find the influence of geometrical parameters such as radial thickness of the hub, radial interference, and various shrink-fitting methods on the design parameter of overall minimum critical crack length (OMCCL)&mdash;a measure of likelihood of failure by cracking. Using the results of DOE study conducted on both the assembly procedures, AP1 and AP2 are quantitatively compared for the likelihood of fracture during assembly. </p><p> For single-staged shrink-fitting methods, for high and low hub radial thickness to hub inner diameter ratio, assembly procedure AP1 and AP2 are recommended, respectively. For fulcra with low hub radial thickness to hub inner diameter ratio and where staged shrink-fitting methods are used, for AP2, cooling the trunnion in dry-ice/alcohol and heating the girder, and for AP1, cooling the trunnion-hub assembly in dry-ice/alcohol followed by immersion in liquid nitrogen is recommended. For fulcra with high hub radial thickness to hub inner diameter ratio and where staged shrink-fitting methods are used, cooling the components in dry-ice/alcohol and heating the girder is recommended for both AP1 and AP2. </p><p> Due to the limitations of AP2, assembly procedures by heating the girder with heating coils instead of dipping an already stressed trunnion-hub assembly in liquid nitrogen are studied for decreasing the likelihood of failure by cracking and yielding. In an assembly procedure called AP3-A, only the girder is heated to shrink-fit the trunnion-hub assembly in the girder. This assembly procedure AP3-A is found to be infeasible because the girder fails by yielding if heating is expected to be completed in a reasonable amount of time. An alternative assembly procedure called AP3-B is suggested for shrink-fitting where the heating of the girder is combined with cooling the trunnion-hub assembly in dry-ice/alcohol mixture. This assembly procedure AP3-B is found to be feasible. A complete DOE study is conducted on AP3-B to find the influence of parameters like hub radial thickness and radial interference at trunnion-hub interface on the design parameter of overall minimum critical crack length. The design parameter, OMCCL values during the assembly procedure AP3-B are quantitatively compared with the widely used assembly procedures (AP1 single-stage shrink-fitting and AP1 multi-staged shrink fitting). The results of this work suggest that increasing the hub radial thickness decreases the likelihood of fracture significantly. For hubs with large radial thickness, heating the girder combined with cooling the trunnion-hub in dry-ice/alcohol mixture (AP3-B) is recommended but for hubs with low radial thickness, multistage cooling of the trunnion-hub assembly in dry-ice/alcohol mixture followed by dipping in liquid nitrogen (AP1- multistage cooling) is recommended.</p>
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Paul, Jai P. "Sensitivity analysis of design parameters for trunnion-hub assemblies of bascule bridges using finite element methods." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001157.

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Huang, Po-Shen, and 黃柏慎. "Research and Development of Single-span Bascule Bridges for Disaster Relief." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/beegv9.

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碩士<br>國立臺北科技大學<br>土木與防災研究所<br>101<br>Taiwan located in subtropical zone often faces the attack of typhoon. Because of steep terrain in Taiwan and extreme weather, heavy rainfalls brought by strong typhoon result in large-scale floods and landslides which damage a lot of bridges. When a bridge is destroyed, the most important thing is traffic rehabilitation. As far as we know, there are some emergency bridges made of steel or fiber reinforced polymer. However, these bridges are heavy and inconvenient to deliver to the field site. Therefore, my research is focused on designing a single-span portable and lightweight bascule bridge which can be used as a temporary emergency bridge to restore traffic at the first time. Because the proposed bridge is easy to transport, install and store, people in remote districts can build it up the by themselves within half an hour. In my research, the concept of pantograph mechanism is used to make the proposed bridge deployable and contracted, which provides convenience to assemble and store the bridge. Also, the bridge is built up from hollow members in order to reduce self-weight. Thus, the bridge is easy to carry. To achieve the goal of making the bridge span over a river without piers, the idea of bascule bridges is employed to rotate the bridge deck. Finally, static and dynamic tests are conducted to check if the proposed bridge satisfies the requirements of AASHTO pedestrian bridge specification. In addition, the comparisons between the experimental results and numerical simulations by finite element software MSC Patran and Nastran are used to evaluate the validity of the numerical model.
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Books on the topic "Bascule bridge"

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Great Britain. Scottish Office Industry Department. Roads Directorate. Skye Crossing: Preliminary report on the proposals for a fixed road crossing from mainland Scotland to the Isle of Skye by means of a causeway and bascule bridge. Scottish Office Roads Directorate, 1991.

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Book chapters on the topic "Bascule bridge"

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Kolínský, Vojtěch, Pavel Očadlík, and Pavel Ryjáček. "The Design and Experimental Verification of a Bascule Bridge in the River Port České Vrbné." In The Eight International Conference "Bridges in Danube Basin". Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-658-03714-7_29.

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van Cann, K., L. Hendriks, and A. Zeilmaker. "Expanding the (Life) Span of Two Bascule Bridges." In High Tech Concrete: Where Technology and Engineering Meet. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_305.

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Yang, Y., and D. Magistro. "Railroad bascule bridge load rating." In Bridge Maintenance, Safety, Management and Life Extension. CRC Press, 2014. http://dx.doi.org/10.1201/b17063-202.

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Yang, Yuhe, William B. Lyall, Eric R. Kelley, and Kongsak Pugasap. "Rehabilitation Design of a Bascule Bridge – Including Jacking Up an 800-Ton Bascule Leaf." In Bridge design, construction and maintenance. Thomas Telford Publishing, 2007. http://dx.doi.org/10.1680/bdcam.35935.0027.

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Kelly, E. "New bascule bridge for historic New Bern, North Carolina." In Modern Techniques in Bridge Engineering. CRC Press, 2011. http://dx.doi.org/10.1201/b11340-32.

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Weidner, J. "Health monitoring of the Tacony-Palmyra bridge bascule span." In Bridge Maintenance, Safety, Management and Life-Cycle Optimization. CRC Press, 2010. http://dx.doi.org/10.1201/b10430-355.

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"Rehabilitation of Bridge Street Bridge preserving a nineteenth century historic bascule lift span." In Safety and Reliability of Bridge Structures. CRC Press, 2009. http://dx.doi.org/10.1201/9780203861585-17.

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van Hagen, P., and H. Protin. "Rehabilitation of Bridge Street Bridge preserving a nineteenth century historic bascule lift span." In Safety and Reliability of Bridge Structures. CRC Press, 2009. http://dx.doi.org/10.1201/9780203861585.ch12.

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Griesing, K. "Replacement of a rare Hanover skewed bascule—The Hamilton Avenue Bridge, New York City, USA." In Safety and Reliability of Bridge Structures. CRC Press, 2009. http://dx.doi.org/10.1201/9780203861585.ch13.

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"Replacement of a rare Hanover skewed bascule—The Hamilton Avenue Bridge, New York City, USA." In Safety and Reliability of Bridge Structures. CRC Press, 2009. http://dx.doi.org/10.1201/9780203861585-18.

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Conference papers on the topic "Bascule bridge"

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Kaderbek, Stan-lee C., Joseph Quattrochi, Luis Benitez, Michael Haas, and David Sutfin. "Congress Street Bascule Bridge Reconstruction." In Structures Congress 2012. American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412367.069.

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Cusson, Benoit, and Tony Mailhot. "Design of a Remarkable Bascule Bridge Over an Historical Canal." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.1635.

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&lt;p&gt;The Gouin bascule bridge is a 1,300 tons gigantic steel structure that allows pleasure boats to enter the Chambly Canal National Historic Site and provides access over the Richelieu river for vehicles, cyclists and pedestrians. As part of a project to revitalize and modernize the city centre, the architectural concept of the movable bridge will provide a landmark to this highly touristic site. There are only few examples in the world of such movable bridges with a large suspended counterweight. The challenges of the project include strict architectural criteria, fabrication and alignment of over 800 mm in diameter pins, the assembly on-site of remarkably large bridge parts and the precise balancing of the bridge.&lt;/p&gt;&lt;p&gt;When designing this structure, WSP made sure to consider the non-redundant aspect of some parts of the structure. Details regarding the design of the stays supporting the entire upper structure and the hydraulic cylinders initiating the rotation are described in this paper. The planning of the works in the middle of the critical infrastructures and services surrounding the bridge is explained. Since no interruption of the navigation on the canal was allowed during construction, some special considerations had to be taken with regards to the works at the foundation units.&lt;/p&gt;
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Arzoumanidis, Serafim G., and Sean A. Bluni. "Replacement of the Woodrow Wilson Memorial Bridge Bascule Span." In IABSE Symposium, Weimar 2007: Improving Infrastructure Worldwide. International Association for Bridge and Structural Engineering (IABSE), 2007. http://dx.doi.org/10.2749/222137807796158228.

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Zhang, Lei, Zhendong Qian, and Yun Liu. "Special Considerations and Analysis for the Bascule Bridge Pavement." In GeoHunan International Conference 2009. American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41048(355)4.

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Mlakar, Rok, and Viktor Markelj. "The Ołowianka Bascule Footbridge in Gdansk – A Bridge That Makes the Difference." In Footbridge 2022 (Madrid): Creating Experience. Asociación Española de Ingeniería Estructural, 2021. http://dx.doi.org/10.24904/footbridge2022.017.

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&lt;p&gt;In the city of Gdansk in Poland, in the very centre of the Baltic capital, on 17 June 2017, a new draw footbridge was ceremoniously opened to the public. The Ołowianka footbridge represents the long-time much-needed link between the highly tourist-visited historical old town and Ołowianka Island, where further cultural, tourist and recreation facilities are located. The bridge spans a very busy navigable channel of the Motława River, leading inward towards other city channels, a harbour for many tourist ships and the Gdansk Marina. Being the main navigable entrance to the city centre, the Motława is constantly under nautical traffic, so the Ołowianka footbridge operates 24/7, according to a 30-minute schedule. The Ołowianka footbridge is an extraordinary acquisition for the city of Gdansk, which immediately became a new landmark and much more in the already very picturesque historic city centre. Not just its design, but also its carefully chosen location and its realisation at the right moment, has made this bridge indispensable to the inhabitants, visitors and the administration of the city of Gdansk, decisively contributing to further development in the Ołowianka Island area and its surroundings.&lt;/p&gt;
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Jiang, Yang, and Semyon Treyger. "Seismic Design of South Park Bascule Bridge Supported on Sunken Caisson Foundations." In Structures Congress 2010. American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41130(369)19.

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van der Burg, Mark, Bert Hesselink, Ronald Geijsen, and Vincent Verdouw. "The design challenges of the new movable bascule bridge 'Parallelstructuur A12 Gouda'." In IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment. International Association for Bridge and Structural Engineering (IABSE), 2016. http://dx.doi.org/10.2749/stockholm.2016.2344.

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Ekholm, Kristoffer, and Jacob Hellgren. "Construction methods for building the Hisingen Bridge." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0144.

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&lt;p&gt;Gothenburg’s main connection across the river Göta älv needs to be secured for the future. The existing bascule bridge will be replaced by a new vertical lift bridge as of 2021. This river crossing is the only connection across the river for the entire tram network in Gothenburg. It is also a very important connection for busses, pedestrians, bicycles and cars. The location of the new bridge, close to the existing bridge in the central part of Gothenburg, generates several challenges that requires special attention such as: logistics, construction planning and minimal impact on the existing city during construction.&lt;/p&gt;&lt;p&gt;The new bridge is constructed as two separate bridges. One larger bridge that carries all means of transportation with a vertical lift span over the fairway and one bridge exclusively for public transport. There are several very difficult technical challenges within this project. One key challenge has been finding a balance between on-site construction and off-site prefabrication due to lack of space and tight deadlines. None of the construction are not allowed to have any negative impact on the traffic nor surrounding structures, which has shown to be difficult during foundation works.&lt;/p&gt;
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Wang, Yongxin, Matthew Jablonski, Chaitanya Yavvari, et al. "Safety and Security Analysis for Movable Railroad Bridges." In 2019 Joint Rail Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/jrc2019-1251.

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Movable railroad bridges, consisting of lift, bascule, or swing bridges have been used by American rail tracks that cross usable waterways for over a century. Although custom made, movable bridges share many common components and designs. Most of them use weight bearing towers for the movable span using electric or electro-hydraulic systems lift and/or rotate these movable spans. Automated locks hold the bridge in place as soon as the movement stops. The bridge operation, train and ship signaling systems work in synchrony for trains and waterway traffic to be granted safe passage with minimal delay. This synchrony is maintained by using custom-made control systems using Programmable Logic Controllers (PLCs) or Field Programmable Gate Arrays (FPGAs). Controllers located on the movable and the static parts of the bridge communicate using radio and/or wired underwater links sometimes involving marine cables. The primary objective of this paper is to develop a framework to analyze the safety and security of the bridge operating systems and their synchronous operations with railway and waterway systems. We do so by modeling the movable physical components and their control system with the interconnected network system and determine the faults and attacks that may affect their operations. Given the prevalence of attacks against PLCs, FPGAs and controllers, we show a generic way to determine the effect of what if scenarios that may arise due to attacks combined with failures using a case study of a swing bridge.
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Marzella, Frank. "Restoration of Two Historic Movable Bridges." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.2263.

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&lt;p&gt;The Murray Morgan Lift Bridge in Tacoma WA was constructed in 1913. In 2007, the bridge was closed to vehicular and pedestrian traffic for advanced deterioration of structural systems, mechanical and electrical components. The bridge was scheduled for demolition. In 2010 after acquiring funding, the City of Tacoma awarded a design‐build contract to reconstruct this historic bridge. The restoration work included structural steel strengthening repairs, seismic improvements, roadway deck, and stringer replacement, complete paint system removal/re‐coating, as well as modernization of the antiquated mechanical/electrical systems. Construction was completed 2012 and full legal load traffic was restored.&lt;/p&gt;&lt;p&gt;The Broadway Bridge in Portland OR was constructed in 1912. The bridge is a unique Rall type double leaf bascule and is listed on the National Register of Historic Places. After more than 100 years of service, the cast steel Rall wheels and tracks that support the entire weight of the movable spans were severely deteriorated and required replacement. Complex jacking, machining, and updated materials were required to renew these critical components. Construction was completed in 2018.&lt;/p&gt;&lt;p&gt;This paper will summarize the innovative design solutions developed to restore and strengthen these two historic movable bridge structures.&lt;/p&gt;
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