Results 41 to 50 of about 943 (198)

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

A PZT-Based Smart Anchor Washer for Monitoring Prestressing Force Based on the Wavelet Packet Analysis Method

Applied Sciences
Prestressed steel strands in prestressed structures offset or reduce the tensile stress caused by external loads, making them the primary load-bearing components.
Long Wang, Liuyu Zhang, Di Mo, Xiaoguang Wu   +3 more
doaj   +1 more source

Fluid‐induced slip on a rate‐and‐state fault during co‐ and post‐injection: The interplay of fluid pressure diffusion and poroelastic stress

Deep Underground Science and Engineering, EarlyView.
Fault slip can occur ahead of the injection pressure front due to poroelastic stress. Our model captures the interaction of pressure, stress, and friction, providing new insights into injection‐induced seismicity and post‐injection fault slip. Shut‐in operations can either mitigate or accelerate seismic events depending on fault conditions and ...
Qifeng Xie, Lei Wang, Qi Li
wiley   +1 more source

Investigation on the mechanical behavior of the multiple‐layered lining structure of a water conveyance tunnel with high internal water pressure

Deep Underground Science and Engineering, EarlyView.
This study presents large‐scale similarity model testing (geometric ratio 3.6) of an innovative multiple‐layered lining system—comprising exterior precast segments, middle self‐compacting concrete, and an interior steel pipe—for high‐pressure (0.75 MPa) water conveyance tunnels.
Ramin Asadi, Shimin Wang, Chang Liu, Zhiyu Lin, Chuan He   +4 more
wiley   +1 more source

Evaluation of prestress losses in concrete beams using destructive and non‐destructive methods

Structural Concrete, EarlyView.
Abstract Over the past few decades, prestressing techniques have become essential in the construction of key structures, infrastructure, and bridges. The serviceability and safety of prestressed concrete (PC) elements are closely tied to the effectiveness of the prestressing process.
A. N. Consiglio, G. Muciaccia, G. Rosati
wiley   +1 more source

Development and Experimental Study of a Self-Aware Posttensioned Prestressed Intelligent Reinforcement Structure

Advances in Civil Engineering, 2023
A self-aware posttensioned prestressing intelligent reinforcement system with force and sensors is proposed by combining the advantages of posttensioned prestressing reinforcement technology and intelligent structure.
Guodong Li, Xiaotong Jing, Jinbo Wang, Chunguang Lan   +3 more
doaj   +1 more source

Synergic Identification of Prestress and Moving Forces for Prestressed Concrete Bridges [PDF]

, 2018
This thesis is a comprehensive study of a synergic identification of prestress and moving forces for prestressed concrete bridges. An innovative synergic identification method is proposed, and validated by the numerical and experimental tests. Results illustrate that both moving/stationary excitation and the prestress force can be estimated accurately ...
openaire   +2 more sources

Large‐scale tests of 50‐year‐old prestressed concrete bridge girders

Structural Concrete, EarlyView.
Abstract An experimental investigation has been carried out as part of the BRIDGE|50 research project, focusing on large‐scale loading tests performed on five 50‐year‐old prestressed concrete (PC) girders. The study aimed at evaluating the structural response of five girders retrieved from a viaduct in the urban area of Turin, Italy, subjected to 4 ...
Francesco Tondolo, Pierclaudio Savino, Donato Sabia, Antonino Quattrone, Fabio Biondini, Gianpaolo Rosati, Mattia Anghileri, Bernardino Chiaia   +7 more
wiley   +1 more source

Determination of the in situ coefficient of friction and imperfection of prestressing cables [PDF]

Građevinski Materijali i Konstrukcije, 2017
Prestressing structural elements allows an increase in the spans of reinforced concrete structures. In the design and dimensioning of prestressed reinforced concrete structures it is necessary to know, that is to adopt a number of parameters which are ...
Bojović Dragan, Aranđelović Bojan, Janković Ksenija, Senić Aleksandar, Stojanović Marko   +4 more
doaj   +1 more source

Variation of Prestress Force in a Prestressed Concrete Bridge During the First 30 Months [PDF]

PCI Journal, 1996
Prestress variations were measured in a prestressed concrete box girder bridge near Reno, Nevada, where the ambient relative humidity is highly variable. The data showed that the actual total creep and shrinkage losses are 30 percent higher than those calculated using a time-step analysis and 60 percent higher than those estimated by the AASHTO ...
M. Saud Saudi, Joseph Shields, Daniel O’Connor, Eric Hutchens   +3 more
openaire   +1 more source