It is essential to make openings in structural concrete elements to accommodate mechanical and electrical needs. To study the effect of these openings on the performance of reinforced concrete (RC) elements, a numerical investigation was performed and validated using previous experimental work. The effect of the position and dimension of the opening and the beam length on the response of the beams, loads capacities, and failure modes was studied. The simulated RC beams showed different responses, loads capacities, and failure modes depending on the position and dimension of the opening. The transversal near support opening (TNSH) and longitudinal holes (LH) showed lower effects on the load capacities of the beams than the transversal near center opening (TNCH). The supreme reduction percentages of the load capacity (%) for beams with TNCH and TNSH were 37.21% and 30.34%, respectively (opening size = 150 × 150 mm). In addition, the maximum % for beam with LH was 17.82% (opening size = 25% of the beam size). The TNSH with a width of less than 18.18% of the beam shear span (550 mm) had trivial effects on the beam's load capacities (the maximum % = 1.26%). Although the beams with combined LH and TNCH or LH and TNSH showed different failure modes, they experienced nearly the same load reductions. Moreover, the length of the beam (solid or hollow) had a great effect on its failure mode and load capacity. Finally, equations were proposed and validated to calculate the yield load and post-cracking deflection for the concrete beams with a longitudinal opening.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658486 | PMC |
| http://dx.doi.org/10.3390/ma14237203 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Novel Inverse Analysis Method for Mechanical Parameter Acquisition in SiC/SiC Composites and Its Application to Turbine Disc Damage Assessment.
Materials (Basel)
January 2025
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China.
Article Synopsis
- Accurately determining the mechanical parameters of SiC/SiC composites is essential for designing effective turbine disc structures.
- A 2D model of these composites was created using CT scanning and machine learning, and their mechanical properties were analyzed through uniaxial tensile tests and genetic algorithms.
- The study found that simulation results closely matched experimental data, leading to validated finite element models for different turbine disc designs and their damage simulations.
From Crop Residue to Corrugated Core Sandwich Panels as a Building Material.
Materials (Basel)
December 2024
Department of Sustainable Bioproducts, Mississippi State University, P.O. Box 9820, Starkville, MS 39762, USA.
This study explores the potential of using underutilized materials from agricultural and forestry systems, such as rice husk, wheat straw, and wood strands, in developing corrugated core sandwich panels as a structural building material. By leveraging the unique properties of these biobased materials within a corrugated geometry, the research presents a novel approach to enhancing the structural performance of such underutilized biobased materials. These biobased materials were used in different lengths to consider the manufacturing feasibility of corrugated panels and the effect of fiber length on their structural performance.
View Article and Find Full Text PDFEnhanced Compressive Mechanical Properties of Bio-Inspired Lattice Metamaterials with Taper Struts.
Materials (Basel)
December 2024
Suzhou XDM 3D Printing Technology Co., Ltd., Suzhou 215000, China.
The stress distribution within the struts of lattice metamaterials is non-uniform under compressive loads, with stress concentrations typically occurring at the node regions. Inspired by bamboo, this study proposes a type of body-centered cubic (BCC) lattice metamaterial with tapered prism struts (BCCT). The compressive behavior, deformation modes, mechanical properties, and failure mechanisms of BCCT lattice metamaterials are systematically analyzed using finite element methods and validated through compression tests.
View Article and Find Full Text PDF[Origanum vulgare and hemorrhagic risk, about a case].
Ann Cardiol Angeiol (Paris)
January 2025
Laboratoire centrale de l'établissement hospitalier Didouche Mourad, Constantine, Algérie; Université constantine 3, faculté de médecine, Algérie. Electronic address:
Introduction: The use of medicinal plants in Algeria is an ancestral practice that remains relevant today. The population relies on plants to treat various diseases and everyday ailments, which can be dangerous, especially when taking medication [1,2]. The interaction between plants and medication can lead to a modification of the plasma concentrations of the latter, which can impact its therapeutic effectiveness and be responsible for toxicity or therapeutic failure [1,2].
View Article and Find Full Text PDFFeasibility, Acceptability, and Preliminary Efficacy of the Taking Care of Us Intervention for Couples Living With Heart Failure.
Innov Aging
December 2024
William F. Connell School of Nursing, Boston College, Chestnut Hill, Massachusetts, USA.
Background And Objectives: Despite the significant impact of heart failure on both members of the care dyad, few interventions focus on optimizing the health of the dyad. The current study examined the feasibility and acceptability of the novel Taking Care of Us (TCU) program with mid-late-life couples living with heart failure and explored preliminary efficacy.
Research Design And Methods: This NIH Stage I study used a 2-arm randomized controlled trial with pretest-post-test design and an additional 5-month follow-up to compare TCU with an educational counseling attention-control condition.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!