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Flexural Behavior of Concrete Beams Strengthened with Polyurethane-Matrix Carbon-Fiber Composites
Publisher: ASCE
Abstract: Fiber-reinforced polymer (FRP) materials have been increasingly used for external strengthening of reinforced concrete (RC) infrastructure. However, the focus has been almost exclusively on epoxy-based composites, and other ...
R -Factor Parameterized Bridge Damage Fragility Curves
Publisher: American Society of Civil Engineers
Abstract: Damage fragilities describe the probability that a bridge will incur certain (discrete) damage states conditioned on the intensity of the earthquake it may experience. Reinforced concrete box girder highway overpass bridges ...
Polyurethane-FRP External Strengthening of RC Beams with No Steel Stirrups
Publisher: American Society of Civil Engineers
Abstract: Externally bonded (EB) fiber-reinforced polymer (FRP) composites are an effective means for the strengthening of shear-deficient reinforced concrete flexural members. Previous studies have predominantly employed epoxy-based ...
Implementation of Nonlinear Elements for Seismic Response Analysis of Bridges
Publisher: American Society of Civil Engineers
Abstract: General purpose finite-element software tools have put nonlinear analysis within an engineer’s reach for the assessment of bridge response to seismic loading. Although these tools can capture strength, ductility, and ...
Three-Dimensional Fiber-Based Models of Precast and Cast-in-Place Reinforced Concrete Columns
Publisher: ASCE
Abstract: Reliable and robust numerical modeling of RC columns under lateral load is commonly performed using one-dimensional elements. Although the strain is assumed to vary linearly through the section, bond-slip and buckling of ...
Consistent Software-Specific Nonlinear Dynamic Response of Highway Bridges
Publisher: ASCE
Abstract: Compared to linear analysis approaches, nonlinear analysis of bridge models under large seismic demands has enabled more realistic prediction of global and local responses. However, the sensitivity to modeling assumptions, ...
Durability and Failure Modes of Concrete Beams Strengthened with Polyurethane or Epoxy CFRP
Publisher: ASCE
Abstract: Externally bonded carbon-fiber-reinforced polymer (CFRP) composites are increasingly being used for repair of concrete infrastructure. Both the mechanical performance and the long-term durability of such a repair have ...
Modeling by Altering Parameter Values during Time-Dependent Finite-Element Simulations
Publisher: American Society of Civil Engineers
Abstract: Finite element software, particularly software with contributions from many developers, often contain models with heavily duplicated code with only minor differences in parameter values and state determination. The lack ...
Testing and Analysis of Precast Columns with Grouted Sleeve Connections and Shifted Plastic Hinging
Publisher: American Society of Civil Engineers
Abstract: Prefabricated reinforced concrete column connections employing grouted sleeve (GS) splices enable rapid construction, are familiar to contractors, and their detailing resembles cast-in-place (CIP) construction. Previous ...
Scaling Bias and Record Selection for Quantifying Seismic Structural Demand
Publisher: American Society of Civil Engineers
Abstract: Lack of sufficient earthquake records for a given site and hazard level is a frequent challenge in seismic response assessment. This paper considers the response of several simple nonlinear systems to “amplitude-scaled” ...
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