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RISAxial Behavior of Square Reinforced Concrete Columns Strengthened with Lightweight Concrete Elements and Unbonded GFRP Wrapping
Publisher: American Society of Civil Engineers
Abstract: This paper presents a new, efficient, and economic confinement technique for square reinforced concrete (RC) columns with unbonded glass fiber-reinforced polymer (GFRP) wrapping and lightweight concrete elements at the ...
Innovative CFRP-Prestressing System for Strengthening Metallic Structures
Publisher: American Society of Civil Engineers
Abstract: An innovative retrofit system to prestress carbon fiber reinforced polymer (CFRP) plates and attach them to existing metallic beams was developed (patent number CH 706 630 B1) and tested. The system does not require any ...
Effects of Gradually Anchored Prestressed CFRP Strips Bonded on Prestressed Concrete Beams
Publisher: American Society of Civil Engineers
Abstract: Four prestressed concrete beams were constructed and tested to investigate the effectiveness of flexural post-strengthening with prestressed carbon fiber-reinforced polymer (CFRP) strips. One of the beams served as a ...
Prestressed CFRP for Strengthening of Reinforced Concrete Structures: Recent Developments at Empa, Switzerland
Publisher: American Society of Civil Engineers
Abstract: In civil engineering today, only 20 to 30% of the strength of carbon-fiber-reinforced polymer (CFRP) strips is used when they are applied as externally bonded strips for flexural and shear strengthening or in confinement ...
Front and Side View Image Correlation Measurements on FRP to Concrete Pull-Off Bond Tests
Publisher: American Society of Civil Engineers
Abstract: Understanding the transfer of force by bond between externally bonded fiber-reinforced polymer (FRP) reinforcement and concrete is an important step in formulating good models for predicting debonding failures observed in ...
Strengthening of Steel Connections in a 92-Year-Old Railway Bridge Using Prestressed CFRP Rods: Multiaxial Fatigue Design Criterion
Publisher: ASCE
Abstract: This paper presented a new retrofit system for strengthening the stringer-to-floor-beam double-angle connections in a 92-year-old riveted railway bridge in Switzerland, using prestressed carbon fiber-reinforced polymer ...
Development of a Mechanical Wedge–Barrel Anchor for CFRP Rods: Static and Fatigue Behaviors
Publisher: ASCE
Abstract: In this study, a mechanical anchorage for prestressed carbon fiber–reinforced polymer (CFRP) rods was proposed. The proposed anchorage consisted of a steel barrel with a conical hole and three separate aluminum wedges that ...
Calculation Technique for Externally Unbonded CFRP Strips in Structural Concrete Retrofitting
Publisher: American Society of Civil Engineers
Abstract: This paper presents a calculation procedure for externally unbonded carbon fiber–reinforced polymer (CFRP) strips anchored at their ends in flexural strengthening of existing reinforced concrete structures. Due to strain ...
Cross-Laminated Timber Plates: Evaluation and Verification of Homogenized Elastic Properties
Publisher: American Society of Civil Engineers
Abstract: Cross-laminated solid wood panels are used in timber structures as load bearing plates and shear panels. Since timber is a relatively soft construction material, the design of such structures is driven by serviceability ...
Structural Strengthening with Prestressed CFRP Strips with Gradient Anchorage
Publisher: American Society of Civil Engineers
Abstract: This paper presents the principle and the application of an innovative anchorage technique for prestressed carbon fiber–reinforced polymer (CFRP) strips in structural strengthening. Additionally, large-scale static loading ...