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"Bridge construction"
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The Golden Gate Bridge
\"Explains the history behind and the process of building the Golden Gate Bridge\"-- Provided by the publisher.
Book
Seismic Performance of Precast Columns with Mechanically Spliced Column-Footing Connections
This paper presents the results from a large-scale experimental study that was conducted at the University of Nevada, Reno, NV. Five half-scale bridge column models were constructed and tested under reversed slow cyclic loading. The study focused on developing four new moment connections at column-footing joints for accelerated bridge construction in regions of high seismicity. The new connections were employed in precast columns, each using mechanical splices to create connectivity with reinforcing bars in a cast-in-place footing. Two different mechanical splices were studied: an upset headed coupler and a grout-filled sleeve coupler. Along with the splice type, the location of couplers within the plastic hinge zone was also a test variable. All precast models were designed with the intent to emulate conventional cast-in-place construction and, thus, were compared with a conventional cast-in-place test model. Results indicate the behavior of these new connections was similar to that of conventional cast-in-place construction with respect to key response parameters, although the plastic hinge mechanism could be significantly affected by the couplers. [PUBLICATION ABSTRACT]
Journal Article
The Golden Gate Bridge
In 1933, no one believed it was possible to build a bridge across the Golden Gate Strait near San Francisco. Many people doubted that a bridge could be built to withstand the strait's treacherous waves, heavy fog, and salty air. Joseph Strauss believed he could build a bridge to connect the people of northern California to San Francisco. Since 1937, the Golden Gate Bridge has withstood earthquakes and severe weather. Discover the story of how Strauss's dream of creating this massive, beautiful structure almost never happened and how it has become beloved and respected by people around the world.
Book
Precast Concrete Bridge Column-Footing Connections with Recessed Grouted Splice Sleeve Connectors
Connections between precast components in accelerated bridge construction (ABC) play an important role in the overall seismic performance of reinforced concrete bridges. This paper describes a new ABC column-footing connection for bridges located in high seismic regions. Half-scale models were designed and built based on an ABC bridge constructed in Utah. The column-footing connection incorporated grouted splice sleeves where the bars were grouted at both ends (GGSS). The GGSS used in the two cyclic tests were placed inside the footing and were recessed a distance of eight bar diameters below the column-footing interface. The difference between the two tests was the location of bar debonding near the column-footing interface. The experimental results showed that the performance of the two specimens was satisfactory and that the connections performed similarly to monolithic cast-in-place (CIP) ones. The performance of the precast connections was compared with previous research on similar CIP and precast specimens with GGSS placed in the footing directly at the column-footing interface. Improved seismic response was observed when the GGSS were recessed inside the footing with a debonded reinforcing bar zone inside the footing. Keywords: accelerated bridge construction (ABC); column; connection; debonding; footing; grouted splice sleeve; mechanical coupler; precast.
Journal Article
Brooklyn Bridge
Describes the planning, construction, and history of the Brooklyn Bridge, celebrated as one of the greatest landmarks and grandest sights of New York City.
Book
Review of accelerated construction of bridge piers - methods and performance
Bridges are an essential part of every road and transportation system, and all countries must build bridges to improve their infrastructure. Accelerated bridge construction (ABC) is an innovative approach that has been noticed in recent years to facilitate and accelerate the process of building, repairing, or replacing bridges. This paper underscores the significance of ABC in bridge construction, focusing on its potential to offer speed, safety, and enhanced longevity for bridge pier. Through a comprehensive exploration of prefabricated elements and systems specific to bridge piers, insights into their applicability, advantages, and limitations are presented. A special section is dedicated to the investigation of pier connections under seismic loads. Furthermore, the review contrasts ABC with traditional construction methodologies, highlighting areas of excellence and potential improvement for ABC.
Journal Article
Building the Golden Gate Bridge
\"From idea to national landmark, this early chapter book highlights the building sequence of the Golden Gate Bridge showing elementary readers how it was engineered and built\"-- Provided by publisher.
Book
Seismic Behavior of External Socket Connections for Reinforced Concrete Columns
This study uses six large-scale experimental tests to investigate the seismic behavior of external socket connections for reinforced concrete columns. The tests evaluated the effects of key design parameters, including socket height and grout strength, on the performance of these connections under reverse cyclic lateral loads. The results indicate that socket height significantly affects whether the plastic hinge forms in the column above the connection or inside the socket and influences the required strength of the structural components. Shorter socket heights required higher grout strengths and increased shear capacity to avoid undesirable failure modes. Three primary failure modes were observed: grout crushing, shear failure, and flexural failure above the socket. Regardless of socket height, all tests showed that external socket connections effectively protect adjoining structural members by limiting plastic strain demands. These findings provide valuable insights into optimizing the design and performance of external socket connections in seismic regions. Keywords: accelerated bridge construction; external socket connection; large-scale tests; reinforced concrete column, seismic design; seismic performance.
Journal Article
Seismic Repair of Severely Damaged Precast Reinforced Concrete Bridge Columns Connected with Grouted Splice Sleeves
A repair technique for severely damaged precast reinforced concrete (RC) bridge columns with grouted splice sleeve (GSS) connections has been developed that uses a carbon fiber-reinforced polymer (CFRP) shell and epoxy-anchored headed bars to relocate the column plastic hinge. Four original specimens were built using an accelerated bridge construction (ABC) technique with two different GSS systems and were tested to failure using cyclic quasi-static loads. One GSS system was used to connect an RC bridge pier cap to a column and the second GSS system was used to connect an RC footing to a column. Failure of the four original specimens occurred at drift ratios between 5.6 and 8.0% with longitudinal bar fracture or pullout from the GSS connections. The repair method successfully relocated the plastic hinge to the original column section adjacent to the repair and was capable of restoring the diminished load and displacement capacity. The method is a viable and cost-effective technique for rapid seismic repair of severely damaged precast bridge assemblies.
Journal Article