Results 21 to 30 of about 145 (133)

Determination of Final Strand Slips of Prestressed Precast Hollow-Core Slabs Subjected to Flexural Load Using Machine Learning Algorithms

Buildings, 2023
Precast prestressed concrete hollow-core slabs (HCUs) are structural elements with less self-weight, providing improved structural effectiveness in withstanding the straining action and allowing for a long span.
Sadi Ibrahim Haruna, Yasser E. Ibrahim, Musa Adamu, Omar Shabbir Ahmed   +3 more
doaj   +1 more source

Prediction model for development length of corroded prestressing strand considering rotation-affected bond failure mechanism

KSCE Journal of Civil Engineering
Evaluation of corrosion’s effect on the development length of prestressing strand is crucial for pretensioned prestressed concrete structures serving in the aggressive environment.
Ju Yi, Lei Wang, Ming Deng, Guodong Wang
doaj   +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, Sung Yong Park, Sung Tae Kim   +2 more
doaj   +1 more source

Pull-Out Strength and Bond Behavior of Prestressing Strands in Prestressed Self-Consolidating Concrete [PDF]

Materials, 2014
With the extensive use of self-consolidating concrete (SCC) worldwide, it is important to ensure that such concrete can secure uniform in-situ mechanical properties that are similar to those obtained with properly consolidated concrete of conventional fluidity.
Wu-Jian Long, Kamal Khayat, Guillaume Lemieux, Soo-Duck Hwang, Feng Xing   +4 more
openaire   +2 more sources

A Sensor-Type PC Strand with an Embedded FBG Sensor for Monitoring Prestress Forces

Sensors, 2015
Prestressed Concrete Wire and Strand (PC) strands are the most used materials to introduce prestress in a Pre-Stressed Concrete (PSC) structure. However, it is difficult to evaluate the final prestress force of the PC strand after prestressing or its ...
Sung Tae Kim, YoungHwan Park, Sung Yong Park, Keunhee Cho, Jeong-Rae Cho   +4 more
doaj   +1 more source

Analysis of Short-Term Prestress Losses in Post-tensioned Structures Using Smart Strands

International Journal of Concrete Structures and Materials, 2022
The proper estimation of prestressing force (PF) distribution is critical to ensure the safety and serviceability of prestressed concrete (PSC) structures. Although the PF distribution can be theoretically calculated based on certain predictive equations,
Sang-Hyun Kim, Sung Yong Park, Sung Tae Kim, Se-Jin Jeon   +3 more
doaj   +1 more source

Flexural Behavior of Partially Pretensioned Continuous Concrete Beams

Journal of Engineering, 2017
This paper describes flexural behavior of two spans continuous rectangular concrete beams reinforced with mild steel and partially prestressing strands, to evaluate using different prestressing level and prestressing area in continuous prestressed beams ...
Nazar Kamil Oukaili, Qusai Khudhur Hameed   +1 more
doaj   +2 more sources

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Mechanical Behaviors of Corroded Prestressing Strands

, 2023
AbstractCorrosion will reduce the cross-sectional area of strands and deteriorate the mechanical property of prestressing strands. In this chapter, nineteen corroded strands are obtained through controlling stress level, corrosion time, and chloride ion concentration under artificial climate conditions. Then, the size and geometry of corrosion pits are
openaire   +1 more source

Long-Term Characteristics of Prestressing Force in Post-Tensioned Structures Measured Using Smart Strands

Applied Sciences, 2020
The proper distribution of prestressing force (PF) is the basis for the design of prestressed concrete (PSC) structures. However, the PF distribution obtained by predictive equations of prestress losses has not been sufficiently validated by comparison ...
Sang-Hyun Kim, Sung Yong Park, Se-Jin Jeon   +2 more
doaj   +1 more source