ArticleScientific reports2026
A numerical assignment on local pressure capacity of the concrete under the head of straight anchor bolts.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
3 citing papers in PubMed.
- Experimental and numerical investigation on basaltic soil under RC square footings.Scientific reports · 2026Article
- Numerical assessment of failure load and soil-footing contact stress distribution for concrete foundations on cohesionless soil.Scientific reports · 2026Article
- Shear performance of unreinforced masonry walls with door and window openings strengthened using welded steel mesh.Scientific reports · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
High-strength straight anchor bolts materials require longer embedment lengths in the concrete so the headed bars are employed to significantly reduce the required embedment length of these bars. But they impose concentrated stress on a small concrete surface under the head. In this study, behavior of headed bolts was numerically studied using 3D finite element method (FEM). First, an experimental program consists of four concrete specimens with variations only in head diameter was conducted. Second, FEM program consists of 22 concrete specimens was conducted. The effect of concrete cover thickness around the head was ranging from 85 mm to 510 mm. This variation resulted in a broad range of concrete cover-to-stud diameter ratios from 5 to 30. Additionally, studying the impact of head geometry (hexagonal, square, circular, and pentagonal) was performed. The effect of head diameter from 12 mm up to 50 mm was examined. This study also assessed the effect of using high strength concrete under the head region. The results showed that all specimens exhibited localized compressive failure of the concrete beneath the headed bars. Due to its increased number of sides, the hexagonal head performed better than the square head. When compared to a headed bar with a diameter of 12 mm, the ultimate local pressure of headed bars with diameters of 15, 17, 20, 25, 30, 40, and 50 mm dropped by 53, 60, 68, 76, 78, 87, and 90%, respectively. When the concrete cover-to-stud diameter increased from 5 to 30, there was a noticeable improvement in the final local pressure and the related slip under the rebar head. Overall performance of the bars improved with increase of the members number of the head. When high strength concrete was used under the head, the ultimate local pressure of headed bars increased by 29-152%. Many new formulas were proposed for estimating ultimate local pressure of headed bars.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.