Sensors, 2021 An innovative smart concrete anchorage (SCA) has been developed for monitoring the stress of prestressing (PS) tendons by utilizing smart ultra-high-performance concrete (UHPC).
Dong Joo Kim +2 more
exaly +3 more sources
Tendon Stress Estimation from Strain Data of a Bridge Girder Using Machine Learning-Based Surrogate Model [PDF]
Sensors, 2023 Prestressed girders reduce cracking and allow for long spans, but their construction requires complex equipment and strict quality control. Their accurate design depends on a precise knowledge of tensioning force and stresses, as well as monitoring the ...
Sadia Umer Khayam +4 more
doaj +2 more sources
Lessons from time-dependent deflection in record span prestressed concrete bridges [PDF]
Scientific ReportsGlobally, over 60% of record-span segmentally constructed prestressed concrete (PC) bridges exhibit excessive deflection, severe cracking, and underestimated prestressing losses.
Teng Tong +4 more
doaj +2 more sources
Monitoring and Analysis of Prestress Loss in Prestressed Box Girder Bridges Strengthened with External Prestressing [PDF]
SensorsTo investigate the effects of long-term prestress loss on concrete box girders strengthened with external prestressing, a large-span box girder, in service for over 20 years and strengthened with external prestressing, was monitored for four months ...
Haoran Guo +4 more
doaj +2 more sources
Failure mechanism research and load-bearing capacity of externally prestressed composite beams with web openings [PDF]
Scientific ReportsThe application of external prestressing to composite beams with web openings (CBWOs) significantly extends their elastic working range and optimizes material utilization, manifested through enhanced structural yield moment and load-bearing capacity ...
Longqi Li +4 more
doaj +2 more sources
Applied Sciences (Switzerland), 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 ...
Se-Jin Jeon, Kim Sang-Hyun
exaly +3 more sources
Stage-by-Stage Prestressing Arrangement Design in the Design of Bridges with Hybrid Internal and External Prestressing Tendons [PDF]
预应力技术, 2023 In the design scheme of a bridge with external prestressing tendons and hybrid internal and external tendons, the internal tendons can bear the load in cantilever casting construction, the external tendons can bear the superimposed dead load and the ...
Zhichao Wang, Fangyuan Li
doaj +1 more source
Pull-out test of carbon-fiber composite cable (CFCC) tendon for an internal anchorage
Case Studies in Construction Materials, 2023 An internal strengthening system involving the embedding of a post-tensioned prestressing tendon in a wedge-shaped anchorage of an existing concrete member was developed previously.
Takafumi Mihara +3 more
doaj +1 more source
Experimental Test on Bridge Reinforcement by Enlarging Section-Prestress Method [PDF]
E3S Web of Conferences, 2020 This paper proposes the method of enlarging section combined with prestressed tendon (Enlarging Section-Prestress Method), which has the advantages of both increasing section and external prestressing, such as reducing section height, the prestressing ...
Jia Li +4 more
doaj +1 more source
Prestress loss of prestressing tendons with asymmetrical layout parabolas [PDF]
Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015, 2015 According to the equilibrium condition of geometry relationship, we derived the formulas that can be used to calculate the loss of prestress of prestressing tendons with the double-end tensioning and the asymmetrical arrangement parabolic curves.
Xiuxin Wang, Shanwen Zhang
openaire +1 more source