Results 31 to 40 of about 216 (114)

Research on Safety Performance of Containment Considering Influence of Prestress Loss

Yuanzineng kexue jishu, 2023
The prestress loss has a great influence on the integrity and tightness of the containment. As the service age of the containment increases, the prestress loss gradually increases. The operating experience of most nuclear power plants shows that the rate
SU Chunyang;ZHENG Zhi;PAN Xiaolan;SUN Ye;WANG Yong;TIAN Aonan
doaj  

An Evaluation Method for Effective Prestress of Simply Supported Prestressed Concrete Beams with Breathing Cracks

Advances in Civil Engineering, 2021
Loss of effective prestress and accurate detection of actual stress in existing precast prestressed concrete bridges are two major challenges in the bridge industry. In this respect, this research aims at an improved method for the critical decompression
Wenlong Guo, Peng Liang, Hexu Liu, Y. Frank Chen, Xiaojin Zhao   +4 more
doaj   +1 more source

Capacity of Prestressed Concrete Containment Vessels with Prestressing Loss [PDF]

, 2001
Reduced prestressing and degradation of prestressing tendons in concrete containment vessels were investigated using finite element analysis of a typical prestressed containment vessel. The containment was analyzed during a loss of coolant accident (LOCA) with varying levels of prestress loss and with reduced tendon area.
openaire   +2 more sources

Prestress Loss Distributions along Simply Supported Pretensioned Concrete Beams

Electronic Journal of Structural Engineering, 2016
The prestressing forces in prestressed tendons undergo a process of reduction over a period of time. A common assumption is that prestress loss is constantly distributed throughout the span of a simply supported pretensioned concrete beam.
J. Kent Hsiao
doaj   +1 more source

Prestress Loss and Bending Capacity of Pre-cracked 40 Year-Old PC Beams Exposed to Marine Environment

MATEC Web of Conferences, 2016
Six prestressed concrete beams (PC beam) were used for evaluation, consist of four post-tension beams (PC-O) and two pre-tension beams (PC-R). In order to investigate the effect of crack on prestress loss and bending capacity after long-term exposed ...
Dasar Amry, Irmawaty Rita, Hamada Hidenori, Sagawa Yasutaka, Yamamoto Daisuke   +4 more
doaj   +1 more source

Numerical Study of the Performance of Existing Prestressed Cylindrical Concrete Pipes Strengthened with Reinforced Concrete or Carbon-Reinforced Fiber Polymer Jackets—Part B

Fibers, 2022
A popular water pipe system, used in many countries, is one formed by prestressed cylindrical concrete pipes (PCCP). This study used the results of an experimental investigation on ten (10) PCCP samples taken from an existing water pipeline.
Konstantinos Katakalos, Lazaros Melidis, George Manos, Vassilios Soulis   +3 more
doaj   +1 more source

Prestressed Concrete Box Girder with High-Capacity Strands-Monitoring and Analysis during Fabrication

Buildings, 2022
Despite the attractive merits of high-capacity strands, the application in bridge girders is limited due to concerns, including concrete cracking, excessive stress, and cambers.
Xin Jiang, Xinlin Ban, Lin Ma, Yonghua Su, Qi Cao, Zhouyu Zhang, Jichao Guo   +6 more
doaj   +1 more source

Construction Technology for Ultra-Long Composite Girders of Shenzhen Museum Using Bonded Post-Tensioning Prestressing Approach

Buildings
Long-span prestressed structures present distinct challenges during tensioning. Their considerable length inherently induces significant tendon friction, resulting in substantial prestress loss. Additionally, prestressing operations within buildings will
Lehua Huang, Dongying Li, Xianggang Su, Wei Dai, Rui Bai, Huan Wang   +5 more
doaj   +1 more source

Prestress Loss and Bi-Directional Prestress Effect of a Large-Span U-Shaped Aqueduct: Field Test and Numerical Analysis

Eng
Prestress loss and bi-directional prestress effects are critical design parameters that determine the bearing capacity of large-span U-shaped aqueducts.
Pingan Liu, Tiehu Wang, Yupeng Ou, Xun Zhang   +3 more
doaj   +1 more source

Wave-Screening Methods for Prestress-Loss Assessment of a Large-Scale Post-Tensioned Concrete Bridge Model Under Outdoor Conditions

Applied Sciences
This paper presents advancements in structural health monitoring (SHM) techniques, with a particular focus on wave-screening methods for assessing prestress loss in a large-scale prestressed concrete (PC) bridge model under outdoor conditions.
Chun-Man Liao, Felix Bernauer, Ernst Niederleithinger, Heiner Igel, Céline Hadziioannou   +4 more
doaj   +1 more source