Results 41 to 50 of about 340 (173)
Multi‐level fatigue reliability assessment of reinforced concrete railway bridges
Structural Concrete, EarlyView.Abstract This paper presents a multi‐level reliability framework for assessing the fatigue life of reinforced concrete (RC) railway trough bridges subjected to cyclic loading. The framework incorporates increasing levels of analytical complexity and real‐world data in four steps. First, an analytical model applies S–N curves and the Palmgren–Miner rule
Silvia Sarmiento +7 more
wiley +1 more source
Temperature Compensation of Fiber Bragg Grating Sensors in Smart Strand
Sensors, 2022 Compared to other types of sensors, fiber optic sensors have improved accuracy and durability. Recently, the Smart Strand was developed to maximize the advantages of fiber optic sensors for measuring the cable forces in prestressed concrete structures or
Se-Jin Jeon +2 more
doaj +1 more source
Structural Concrete, EarlyView.Abstract Steel fiber reinforced concrete (SFRC) enhances the flexural capacity of flat slabs and, due to its effectiveness in statically redundant bi‐dimensional elements, represents a viable alternative to conventional reinforcement. Although numerous studies have investigated the flexural behavior of SFRC slabs with and without bonded reinforcement ...
Chiara Gaddi +2 more
wiley +1 more source
NONLINEAR FINITE ELEMENT ANALYSIS OF PRESTRESSED CONCRETE MEMBERS
مجلة النهرين للعلوم الهندسية, 2008 A finite element method of analysis is used to study the strength and behavior of prestressed concrete members under short-term and sustained load conditions. The degenerated assumed strain eight-node shell finite element is used with each node having
Hani M. Fahmi, Zubaidah A. Al-Bayati
doaj
Analytical Model for Deflections of Bonded Posttensioned Concrete Slabs
Advances in Materials Science and Engineering, 2017 This paper presents a finite element analysis approach to evaluate the flexural behavior of posttensioned two-way slabs depending on the tendon layout. A finite element model was established based on layered and degenerated shell elements. Nonlinearities
Min Sook Kim, Joowon Kang, Young Hak Lee
doaj +1 more source
Structural Concrete, EarlyView.Abstract This study investigates the numerical modeling of internal tendon breaks in prestressed concrete structures and evaluates the key parameters affecting accuracy. A combined approach is followed, involving global sensitivity analysis via the Elementary Effects Method and subsequent model calibration using experimental data from distributed fiber‐
Aeneas Paul, David Sanio, Peter Mark
wiley +1 more source
Structural Concrete, EarlyView.Abstract The acoustic emission (AE) technique has proven to be an effective method for detecting individual wire breaks in prestressed concrete structures affected by stress corrosion cracking (SCC). However, despite its widespread application, the quantitative assessment of AE monitoring reliability and optimal sensor placement remains unresolved ...
Max Fiedler, Steffen Marx
wiley +1 more source
Study on Maximum Vertical Prestressing Spacing for Long-Span PC Continuous Rigid-Frame Bridges
BuildingsVertical prestressing is critical for shear resistance in long-span PC continuous rigid-frame bridges, yet existing design methods rely on the inaccurate superposition of single-tendon stress fields, neglecting mechanical interaction between adjacent ...
Fei Xia +2 more
doaj +1 more source
Structural Concrete, EarlyView.Abstract During their life cycle, prestressed concrete bridges are prone to wire breaks of their tendons due to fatigue or stress corrosion cracking. However, not all structures show visible cracking on the surface, which would provide timely warning of otherwise invisible damage. Brittle failure may occur.
Noah Sträter +3 more
wiley +1 more source
Flexural Behavior of a 30-Meter Full-Scale Simply Supported Prestressed Concrete Box Girder
Applied Sciences, 2020 Compared with scaled-model testing, full-scale destructive testing is more reliable since the test has no size effect and can truly record the mechanical performance of the structure.
Jianqun Wang +4 more
doaj +1 more source