Experimental–theoretical investigation of the short-term vibration response of uncracked prestressed concrete members under long-age conditions

Bonopera, Marco; Liao, Wen-Chieh; Perceka, Wisena

doi:10.1016/j.istruc.2021.10.093

Cited by 33 publications

(31 citation statements)

References 46 publications

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“…This is reported by the authors to showcase the adverse effects of compressive stress on spalling. Such behaviour was also highlighted by other researchers experimenting with simply supported, prestressed concrete elements [ 94 ] (for each mentioned study, see more details in Table 8 ).…”

Section: Influencing/mitigating Factorssupporting

confidence: 68%

Heat-Induced Spalling of Concrete: A Review of the Influencing Factors and Their Importance to the Phenomenon

et al. 2022

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Heat-induced spalling in concrete is a problem that has been the subject of intense debate. The research community has, despite all the effort invested in this problem, few certain and definitive answers regarding the causes of and the way in which spalling happens. A major reason for this difficulty is the lack of a unified method for testing, which makes comparing data from various studies against each other a difficult task. Many studies have been performed that show the positive effects of using synthetic micro-fibres, such as polypropylene (PP). The mechanism with which PP fibres improve heat-induced spalling resistance in concrete, however, remains a subject of debate. This paper, therefore, looks at the work that has been performed in the field of spalling (particularly spalling of self-compacting concrete (SCC)). Influencing factors are identified and their links to each other (as reported) are discussed. A particular emphasis is put on discussing the role of PP fibres and how they improve the behaviour of high-performance concrete (HPC) at elevated temperatures. A brief summary of the reviewed papers are provided for each of the influencing factors to help the reader navigate with ease through the references. An introduction to heat-induced spalling and the common causes (as reported in the literature) is also included to highlight the wide range of theories trying to explain the spalling phenomenon.

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Section: Influencing/mitigating Factorssupporting

confidence: 68%

Heat-Induced Spalling of Concrete: A Review of the Influencing Factors and Their Importance to the Phenomenon

et al. 2022

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“…To investigate the UHPC time-dependent shrinkage behavior and the detailed mechanical response within the composite deck structure, the existing shrinkage and creep prediction B3 or B4 model can be introduced from the research of the concrete material [ 25 , 26 ], which describes the early age shrinkage strain as the time-dependent function influenced by the material properties and the environmental relative humidity. The B4 model is proposed for the study of the short-term and long-term shrinkage of uncracked prestressed concrete girders, as this model contains a series of numerical solutions for detecting creep and shrinkage in uncracked concrete members; however, the B3 model is introduced herein for the simple function form, which can be optimized and promoted conveniently.…”

Section: Numerical Model and Simulationmentioning

confidence: 99%

Early Age Shrinkage and Mechanical Effect of Ultra-High-Performance Concrete Composite Deck: A Case Study with In Situ Test and Numerical Simulation

Cao

et al. 2022

Materials

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For the Honghe Bridge project located in Yunnan Province, Southwest China, a steel/ultrahigh-performance concrete (UHPC) composite deck is used in the suspension bridge with a 700 m main span, and the steel stud connectors are used in the 50 mm–thick UHPC layer. To investigate the shrinkage behavior of UHPC and the relevant influence, the in situ time-dependent strain is measured continuously, and within the 20-day curing time, the material behavior is summarized based on test results. This paper proposes a prediction model for UHPC shrinkage which is refined from the widely used B3 model for normal concrete material, and the parameter values are modified and optimized by experimental comparison. Combining the numerical model and the finite element analysis model of the composite deck, the detailed mechanical state in structural parts is studied. For the practical construction, the simulation results indicate that the small thickness of UHPC above the stud and weak bond strength can influence the eventual structural performance greatly. In the discussion of stress distribution at different locations of the deck, the potential crack on the edge and the corner of the UHPC–steel interface and the mechanical damage on the stud connector around are also indicated.

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“…Aloisio et al [ 11 ] conducted a modal analysis for a multi-span concrete bridge to estimate the compressive strength of concrete specimens with seven spans. Bonopera et al [ 12 ] predicted the short-term dynamics of the uncracked prestressed concrete members, which was also valuable for designing new concrete bridges. However, it should be noted that the vibration energy of a bridge has a broadband frequency range since the speeds and weights of vehicles crossing the bridge change with time.…”

Section: Introductionmentioning

confidence: 99%

Improving Energy Harvesting from Bridge Vibration Excited by Moving Vehicles with a Bi-Stable Harvester

et al. 2022

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To monitor the health status of the bridge, many sensors are needed to be mounted on it. Converting bridge vibration energy to electrical energy is considered as a potential solution to the problem of providing reliable electric power to these sensors. The objective of this work is to present an operable strategy for improving the electric energy output of a piezoelectric energy harvester installed on a bridge by introducing bi-stable characteristics. A bi-stable harvester is proposed. By adjusting the tip and fixed magnets, different types of potential energy can be generated, and then the harvester can exhibit the linear, mono-stable and bi-stable characteristics. In the bi-stable state, the harvester triggers snap-through motions easily and generates large outputs. The corresponding prototype was fabricated, and the experiment was carried out to validate the advantage of the bi-stable energy harvester. The experiment results show that the bi-stable energy harvester outperforms the classical linear harvester over the whole range of vehicle speed. As the vehicle speed exceeds a critical one, the snap-through motion will happen, which is beneficial to enhancing the electricity output. This conceptual design may provide guidance for promoting the performance of bridge energy harvesting.

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Experimental–theoretical investigation of the short-term vibration response of uncracked prestressed concrete members under long-age conditions

Cited by 33 publications

References 46 publications

Heat-Induced Spalling of Concrete: A Review of the Influencing Factors and Their Importance to the Phenomenon

Heat-Induced Spalling of Concrete: A Review of the Influencing Factors and Their Importance to the Phenomenon

Early Age Shrinkage and Mechanical Effect of Ultra-High-Performance Concrete Composite Deck: A Case Study with In Situ Test and Numerical Simulation

Improving Energy Harvesting from Bridge Vibration Excited by Moving Vehicles with a Bi-Stable Harvester

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