Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Method of Superposition

Method of Superposition

The method of superposition is a crucial technique in structural engineering, used to analyze the effect of multiple loads on beams. This approach involves calculating the deflection and slope for each load on a beam separately, and then summing these effects to determine the overall impact. It is applicable only when the beam material remains within its elastic limit, ensuring that deformations are linearly elastic.
When applying the method of superposition, each type of load—whether...

Thermal Insulation in Masonry Walls

Thermal Insulation in Masonry Walls

In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....

Conduction, Convection and Radiation: Problem Solving

Conduction, Convection and Radiation: Problem Solving

There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...

Moments of Inertia for Composite Areas

Moments of Inertia for Composite Areas

Composite areas are structures with multiple basic shapes connected in some way. These shapes usually include rectangles, triangles, circles, and other basic shapes that are connected in such a way as to form a single structure. Calculating the second moment of area for a composite area is essential when trying to understand the structure's overall stiffness.
The second moment of area, also known as the moment of inertia, measures a structure's resistance to bending. It is calculated by...

Prismatic Beams: Problem Solving

Prismatic Beams: Problem Solving

In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the...

Mass Concreting

Mass Concreting

Mass concreting refers to the process of placing large volumes of concrete, such as in gravity dams. The heat generated during the cement hydration process and differential cooling rates within the concrete mass can lead to a temperature gradient, which can result in thermal cracks in the concrete mass.
To reduce the risk of such cracking, the concrete mix may incorporate low-heat cement and pozzolans to reduce the temperature rise. Pre-cooled angular aggregates and water-reducing admixtures...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Coverage Intervals.

Journal of research of the National Institute of Standards and Technology·2024

Same author

Reduced-Order Modeling of Composite Floor Slabs in Fire. I: Heat-Transfer Analysis.

Journal of structural engineering (New York, N.Y.)·2024

Same author

Reduced-order modeling of composite slabs in fire. II: Thermal-structural analysis.

Journal of structural engineering (New York, N.Y.)·2024

Same author

Staphylococcus aureus-targeting peptide/surfactant assemblies for antibacterial therapy.

Colloids and surfaces. B, Biointerfaces·2022

Same author

Radiotherapy Combined With Concurrent Nedaplatin-Based Chemotherapy for Stage II-III Esophageal Squamous Cell Carcinoma.

Dose-response : a publication of International Hormesis Society·2022

Same author

MRI Study of Cerebral Cortical Thickness in Patients with Herpes Zoster and Postherpetic Neuralgia.

Journal of pain research·2022

Same journal

Toward understanding ignition vulnerabilities to firebrand showers using reduced-scale experiments.

Fire and materials·2024

Same journal

Exhaust flow calibration for a large-scale calorimetry system using tracer gas dilution.

Fire and materials·2024

Same journal

Headspace sampling-gas chromatograph-mass spectrometer as a screening method to thermally extract fireground contaminants from retired firefighting turnout jackets.

Fire and materials·2023

Same journal

Performance and Failure Mechanism of Fire Barriers in Full-Scale Chair Mock-ups.

Fire and materials·2022

Same journal

Estimating the impact of the mattress fire safety Standard 16 CFR Part 1633 on bed fire outcomes.

Fire and materials·2021

Same journal

Fire resistance of cold-formed steel framed shear walls under various fire scenarios.

Fire and materials·2020

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 9, 2025

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process

Published on: June 30, 2023

Improved Calculation Method for Insulation-based Fire Resistance of Composite Slabs.

Jian Jiang¹, Adam Pintar¹, Jonathan M Weigand¹

¹National Institute of Standards and Technology (NIST), 100 Bureau Drive, Stop 8611, Gaithersburg, MD, USA, 20899.

Fire and Materials

|October 23, 2024

Summary

This summary is machine-generated.

This study improves fire resistance calculations for composite floor slabs. A new formula accounts for concrete moisture and wider slab designs, enhancing accuracy for modern buildings.

Keywords:

EC4 calculation method composite slab fire resistance insulation criterion moisture content slab geometry

More Related Videos

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

Published on: October 19, 2022

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

Published on: June 1, 2016

Related Experiment Videos

Last Updated: Jun 9, 2025

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process

Published on: June 30, 2023

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

Published on: October 19, 2022

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

Published on: June 1, 2016

Area of Science:

Structural Engineering
Fire Safety Engineering
Materials Science

Background:

Composite floor slabs are crucial for building fire resistance, offering structural support and thermal insulation.
Current calculation methods, like Eurocode 4 (EC4), have limitations in geometry and concrete moisture assumptions.
The profiled decking in composite slabs complicates heat transfer analysis compared to flat slabs.

Purpose of the Study:

To develop an improved algebraic expression for estimating insulation-based fire resistance of composite slabs.
To extend the applicability of fire resistance calculations beyond the limitations of current EC4 methods.
To explicitly incorporate the influence of concrete moisture content into fire resistance estimations.

Main Methods:

Finite element modeling (FEM) was used to generate fire resistance data for various composite slab configurations.
A sequential experimental design was employed to select 54 slab configurations for initial analysis.
The proposed algebraic expression was developed based on the FEM-computed fire resistance values.

Main Results:

The proposed algebraic expression accurately estimates insulation-based fire resistance for composite slabs.
The method accounts for a wider range of slab geometries than existing EC4 calculations.
Deviations between the proposed method and verification results (numerical and experimental) were less than 15 minutes.

Conclusions:

The developed algebraic expression offers a more accurate and broadly applicable method for assessing composite slab fire resistance.
Explicitly considering concrete moisture content significantly improves fire resistance prediction accuracy.
The findings support enhanced fire safety design in buildings utilizing composite floor slabs.