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Optimum span length for a PCI girder expressway bridge
Published in Hiroshi Yokota, Dan M. Frangopol, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations, 2021
N. Amatya, N. Anwar, F.A. Najam
Now a days, bridges are constructed using precast concrete in order to accelerate the construction. Besides this, it is gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, aesthetic appearance and structural efficiency (Bhavani et al. 2018). In addition, it also improves the workflow, minimize disruption during bridge construction, maintain and improve construction quality and reduce environmental impacts (WisDOT Bridge Manual 2019). Precast concrete has more strength, durability and constructability than ordinary concrete resulting it to cost effective choice. These days, more and more bridges are being constructed using Precast Concrete due to their higher quality, higher modulus of elasticity and lower creep, shrinkage and permeability, and the fact that they are prepared under plant-controlled conditions (Caltrans 2015).
Inorganic Polymers
Published in Charles E. Carraher, Carraher's Polymer Chemistry, 2017
Concrete masonry is simply the name given to the cement building blocks employed in the construction of many homes, and it is simply a precast block of cement, usually with lots of voids (Picture 12.2). Precast concrete is concrete that is cast and hardened before it is taken to the site of construction. Concrete sewer pipes, wall panels, beams, grinders, and spillways are all examples of precast cements.
Evaluating the Seismic Behavior of Precast Concrete Connections in the Life-Cycle of Concrete Structures
Published in Jaap Bakker, Dan M. Frangopol, Klaas van Breugel, Life-Cycle of Engineering Systems, 2017
Precast concrete saves time and money as well as providing for higher quality of structural members. In recent earthquakes, concrete structures have suffered major damages and this has proved the low efficiency of connections in these structures (PCI, 1992; PPCI, 2007).
Numerical study on the influence of defects in grouting on the mechanical properties of a full grouted sleeve connector
Published in The Journal of Adhesion, 2022
Espoir Kulondwa Kahama, Xie Fuzhe, Desmond-Luke M. Anglaaere
Precast concrete technology enables the production of structural members, which are erected on site, in a controlled environment and is associated with benefits such as the reduction in the duration of the project, good quality of concrete among others.[1] The most crucial part of the precast construction technology is the way the precast members are erected on site. Several research projects in this field focus on how to safely connect the members. Connections are structural members designed to safely transfer loads and enhance the continuity of structures between the members they connect.[1,2] TAHER[3] Classified the connections in precast concrete as dry and wet. Dry connections are usually achieved through steel materials and rely on bolting, anchoring, and onsite welding to connect precast concrete members.[4,5] Wet connections rely on the splicing of the reinforcing bars using a duct dowel. They are achieved by a rebar’s lapping setting and an onsite concrete fill in the lapping dowel.[4] Wet connections are preferred for good ductility, and their performances have been recently rated similar to the monotonic cast-in-situ connection between structural members after a cyclic load test conducted by Cai.[6]
Optimum span length for a PCI-girder expressway bridge
Published in Australian Journal of Civil Engineering, 2021
Nowadays, bridges are constructed using precast concrete in order to accelerate the construction. Besides this, it is gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, aesthetic appearance and structural efficiency (Durga Bhavani et al. 2018). In addition, it also improves the workflow, minimises disruption during bridge construction, maintains and improves construction quality and reduces environmental impacts (WisDOT Bridge Manual 2019). Precast concrete has more strength, durability and constructability than ordinary concrete, making it to be a cost-effective choice. These days, more and more bridges are being constructed using precast concrete due to its higher quality, higher modulus of elasticity and lower creep, shrinkage and permeability and the fact that they are prepared under plant-controlled conditions (Caltrans 2015).
The Vidourle Viaduct
Published in Structural Engineering International, 2018
Yi Zhang, Dominique Regallet, Sylvain Boireau, Christian Charpin
Construction work began in January 2014 and construction of the viaduct was completed in January 2016. Below is a summary of the construction procedure, after which a more detailed description follows: Construction of substructure components (piers and abutments).On-site assembly of the steel frames, which were manufactured in Switzerland.Launching of the steel frames for the Warren and eastern access bridges by jacking.Erection of the steel frame of the western access bridge by crane.Lowering of the steel frames onto their final spherical bearing devices by jacking.Installation of the precast concrete slabs by crane and concrete deck casting.Addition of finishing touches such as sealing, ballast, sleepers, rails, etc.