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Showing 1 to 20 of 66 for “"Concrete bridges"”.
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Deterioration and Cracking in Reinforced Concrete Bridges
Reinforced concrete structures are subjected to several sources of deterioration that can cause a progressive reduction in performance. Among the existing infrastructure typologies, reinforced concrete half-joint bridges are particularly critical. This common structural configuration is …
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Time-Dependent Deformations in Segmental Prestressed Concrete Bridges
… time-dependent behavior of segmental prestressed concrete bridges built by the cantilever method was presented. This analytical procedure was aimed specifically at those bridges where segments are precast and adjacent cantilevers are made continuous. It was based on a step-by-step numerical …
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Machine Learning for the Condition Assessment of Concrete Bridges
The assessment of concrete bridge conditions is critical for ensuring structural integrity and public safety. Traditional inspection methods, which rely heavily on visual inspections and manual assessments, are time-consuming, subjective, and prone to human error. With the increasing number of …
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Shear Reliability Analysis of Reinforced Concrete Bridges Designed to TMH7
… 1981, is the code for the design of reinforced concrete bridges in South Africa. Its normal traffic load model (NA loading), based on the outdated BS5400 design code and 1972 traffic loads, has not been updated to account for the changes in traffic demands. Thereby, the validity of TMH7 in …
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Natural frequencies evaluation on existing reinforced concrete bridges using microtremor testing
Most bridges in Malaysia do not take earthquake loadings into their structural design consideration. Structure constructed without the consideration of seismic design is generally more vulnerable to ground shaking during seismic event. Even though Malaysia is located on the stable Sunda shelf with …
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Strategies for Seismic Assessment of Common Existing Reinforced Concrete Bridges Typologies
… probabilistic framework to evaluate road/railway bridges after an earthquake by means of analytical fragility curves and inspections on the structure. In particular, the assessment is performed on existing reinforced concrete (RC) bridges with a common structural scheme in Italy (multi-span simply …
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The Economy of Preventive Maintenance of Concrete Bridges Due to Corrosion
… and delayed maintenance of deteriorated concrete bridge is fundamentally wrong. This research presents a new approach for the evaluation of the condition states of steel reinforced concrete bridge members, which is based on their chemical conditions instead of the physical deficiencies …
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Service response and evaluation of prestressed concrete bridges through load testing
"During the last two decades, self-consolidating concrete (SCC) has emerged as an alternative to produce structures with longer life expectancy. Despite the advantages that come with using SCC, there are some concerns related to its structural and serviceability response. The effect of the larger …
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Post-seismic response and repair of earthquake-damaged reinforced concrete bridges
… during an earthquake. Therefore, reinforced concrete (RC) bridges that are damaged in an earthquake tend to have damage to the column members. While many studies have been conducted on seismic strengthening of RC bridge columns, most are focused on retrofit instead of repair. In addition, the …
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Automated Generation of Geometric Digital Twins of Existing Reinforced Concrete Bridges
The cost and effort of modelling existing bridges from point clouds currently outweighs the perceived benefits of the resulting model. The time required for generating a geometric Bridge Information Model, a holistic data model which has recently become known as a "Digital Twin", of an existing …
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Seismic Performance of Column-to-Drilled-Shaft Connections in Reinforced Concrete Bridges
… foundations are often used to support reinforced concrete bridge columns founded in soft soils or in locations where a small footprint is desired. Increasingly, the shaft is being built with a diameter larger than that of the column, to allow tolerance in the column placement and to facilitate …
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Post-Earthquake Damage Repair and Probabilistic Damage Control Approach for Reinforced Concrete Bridges
… damage control approach (PDCA) for reinforced concrete (RC) bridges. To develop repair methods, first repair objectives were defined. To define repair objectives, internal earthquake damage was quantified and correlated to a series of visible damage states (DSs). Bridge columns are designed to …
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Comparative study of LRFR and LFR methods of rating for Missouri concrete bridges
… process is fundamental for both new and existing bridges, establishing weight restrictions on vehicles to prevent structural damage and potential failure of the bridge. Communicating these rated bridge loads to road users is achieved through visible signage indicating truck weight limits, commonly …
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Widening of Reinforced Concrete Bridges – Extension of Pier Cap Beams with CFRP Composites
… in traffic load dictates widening highway bridges rather than construction of new bridges, as it offers an economical solution. Highway bridge widening is usually accomplished by the construction of additional new bridge piers, however, large amount of construction work and extensive use of …
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Time-Dependent Deformations and Losses in Concrete Bridges Built by the Cantilever Method
Made available in DSpace on 2014-12-13T19:31:38Z (GMT). No. of bitstreams: 1 7726657.pdf: 4425219 bytes, checksum: c2903be3d6348546e59b131342a92161 (MD5) Previous issue date: 1977
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Numerical study of improved methods of in-field capacity assessment of reinforced concrete bridges
Bridges, particularly short-span highway bridges, are basic elements of nearly all contemporary transportation networks. For reinforced concrete structures, complete information regarding the number, size, and orientation of steel reinforcement is necessary in order to make a complete strength …
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Slab-on-girder prestressed concrete bridges: linear and nonlinear finite element analysis and experimental load tests
… to the overall distribution of live loads in bridges. Cast-in-place concrete intermediate diaphragms were investigated in this study in order to assess their load distribution effectiveness in prestressed concrete I-girder bridges. Finite element packages (Ansys and GT STRUDL) were used to …
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Improvement of the approaches to monitoring of reinforced concrete bridges subjected to chloride-induced reinforcement corrosion in bridge management systems
Reinforcement corrosion in reinforced concrete (RC) bridges has undeniably become the main cause of civil infrastructure durability problems in many countries. The steel reinforcing in concrete corrode when certain conditions (e.g., carbonation, chlorides, insufficient cover and moisture) are met. …
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