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Embedment

About: Embedment is a research topic. Over the lifetime, 2441 publications have been published within this topic receiving 31444 citations.


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Journal ArticleDOI
TL;DR: In this paper, the authors investigated a different cracking type of the northern and southern surfaces caused by different sunlight intensity operating on the exposed tank walls, where concrete mechanical properties constitute the function of hydration degree.
Abstract: Semimassive RC tank wall may crack in the period of concrete maturing due to hydration heat, ambient temperature, solar radiation, and the restraint of thermal strains. The objective is to investigate a different cracking type of the northern and southern surfaces caused by different sunlight intensity operating on the exposed tank walls. This proposition was confirmed by the in situ investigation presented in Part I, followed by measurements with the use of embedment vibrating wire sensors for concrete strains and reinforcement bar stresses and by numerical calculations (Part II). Moreover, the crack width in the interior of the wall was twice as wide as the crack width found on the segment surface. Furthermore, to extend Part I, analytical and experimental results of concrete strains, steel stresses, and cracks are compared and discussed. The analysis covered a viscous-elastic concrete model where concrete mechanical properties constitute the function of hydration degree. In the analysis, a visc...

10 citations

Proceedings ArticleDOI
TL;DR: In this paper, a series of laboratory tests have been conducted to characterize the static and dynamic strain sensing performance of these nanocomposites for monitoring glass fiber-reinforced polymer (GFRP) components.
Abstract: Fiber-reinforced polymers (FRP) composites are widely used in aerospace and civil structures due to its unique material properties. However, damage can still occur and typically manifests itself from within the composite material that is invisible to the naked eye. So as to be able to monitor the performance of FRPs, numerous sensing systems have been proposed for embedment within FRP composites. One such methodology involves the embedment of carbon nanotube-based thin films within FRP laminates for strain monitoring and potentially even damage detection. Unlike other sensors, these piezoresistive thin films possess small form factors (and thus do not serve as stress concentration or damage initiation points) and can be easily integrated during composite manufacturing. In this study, a series of laboratory tests have been conducted to characterize the static and dynamic strain sensing performance of these nanocomposites for monitoring glass fiber-reinforced polymer (GFRP) components. Specifically, monotonic uniaxial, cyclic, and fatigue tests have been conducted, while both time- and frequency-domain measurements have also been obtained. The characterization results obtained from this study indicates bi-functional strain sensitivity to monotonic loading until failure, which is found to be reproducible in cyclic dynamic loadings to amplitudes in both functional ranges.

10 citations

Journal ArticleDOI
TL;DR: In this article, the embedding of HA-2 wt.% Ti composite powder on superplastic Ti-6Al-4V was conducted through continuous pressing technique to improve the low strength of the conventional pure HA coatings.
Abstract: In this research, embedment of HA-2 wt.% Ti composite powder on superplastic Ti–6Al–4V was conducted through continuous pressing technique to improve the low strength of the conventional pure HA coatings. The embedment process was carried out at temperature below the allographic temperature. The bond strength evaluation of HA-2 wt.% Ti composite layer was performed using wear test method under different applied pressure. The experimental results indicated that the HA-2 wt.% Ti composite layer had uniform thickness and well bonded to the substrate. EDX and line scanning analysis revealed that HA elements were detected at the substrate indicating embedment process was successful. The wear test results proved that the strength of the embedded layer on the superplastic Ti–6Al–4V was much better than the as-received Ti–6Al–4V.

10 citations

01 Aug 1987
TL;DR: In this paper, the use of a rigid bridge rail creates a transition problem between the flexible metal beam guard fence which is commonly used upstream of the bridge rail, and the rigidly mounted steel guard fence post (with blockout) to the top of the culvert deck when full soil embedment cannot be achieved.
Abstract: When multiple box culverts span over 20 ft, they are defined by AASHTO as bridge length and thus normally require the use of a full strength rigid bridge rail. The use of a rigid bridge rail creates a transition problem between the flexible metal beam guard fence which is commonly used upstream of the bridge rail. It would be safer and more economical to continue the flexible metal beam guard fence across the culvert even when the culvert length is over 20 ft and even when the soil fill depth over the culvert is less than the standard guardrail post embedment depth of 38 in. in Texas. It was believed that more post could be used with a shallow embedment to achieve the desired guardrail strength. A metal beam guard fence design of this type was crash tested in this study and proved to be unsatisfactory. Another concept investigated was to rigidly mount steel guard fence post (with blockout) to the top of the culvert deck when full soil embedment could not be achieved. A design of this type was also crash tested in this study and proved to be satisfactory.

10 citations

Journal ArticleDOI
TL;DR: In this paper, a multivariate adaptive regression spline (MARS) model-based approach for the determination of horizontal pullout capacity of vertical plate anchors buried in cohesionless soil by utilizing experimental results reported by different researchers was developed.
Abstract: Vertical plate anchors provide an economical solution to safely resist the large horizontal forces experienced by the foundation of different structures such as bulkheads, sheet piles, retaining walls and so forth. This paper develops a multivariate adaptive regression spline (MARS) model-based approach for the determination of horizontal pullout capacity (P u ) of vertical plate anchors buried in cohesionless soil by utilizing experimental results reported by different researchers. Based on the collection of forty different pullout experimental test results reported in the literature for anchors buried in loose to dense cohesionless soil with an embedment ratio ranges from 1 to 5, a predictive approach for P u of vertical plate anchors has been developed in terms of non-dimensional pullout coefficient (M γq ). The capability of the proposed MARS model for estimating the values of M γq is examined by comparing the results obtained in the present study with those methods available in the literature. Using different statistical error measure criteria, this study indicates that the present approach is efficient in estimating the horizontal pullout capacity of vertical plate anchors as compared to other methods. The sensitivity analysis indicates that the embedment ratio (H/h, where H = embedment depth of anchor, and h = height of anchor) and internal friction angle (ϕ) of soil mass are the two most important parameters for the evaluation of non-dimensional pullout coefficient (M γq ) using the proposed MARS model.

10 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023202
2022355
2021160
2020120
2019125
2018139