Structural analysis of tubular truss in fire

2015 ◽  
pp. 181-187
Author(s):  
J Albero ◽  
T Tiainen ◽  
K Mela ◽  
M Heinisuo
Keyword(s):  
Structural Analysis ◽  
In Fire

scholarly journals Model Parameter Sensitivity for Structural Analysis of Composite Slab Structures in Fire

2021 ◽  
Vol 12 (2) ◽  
pp. 339
Author(s):  
Riza Suwondo ◽  
Lee Cunningham ◽  
Martin Gillie ◽  
Made Suangga ◽  
Irpan Hidayat
Keyword(s):  
Structural Analysis ◽  
Parameter Sensitivity ◽  
Composite Slab ◽  
Model Parameter ◽  
In Fire

Reduced-Order Modeling of Composite Floor Slabs in Fire. II: Thermal-Structural Analysis

2020 ◽  
Vol 146 (6) ◽  
pp. 04020081 ◽  
Author(s):  
Jian Jiang ◽  
Joseph A. Main ◽  
Jonathan M. Weigand ◽  
Fahim Sadek
Keyword(s):  
Structural Analysis ◽  
Reduced Order Modeling ◽  
Reduced Order ◽  
Floor Slabs ◽  
In Fire

Structural Analysis of Compression Deformation and Failure of Aluminum in Fire

2011 ◽  
Vol 137 (7) ◽  
pp. 728-738 ◽  
Author(s):  
S. Feih ◽  
E. Kandare ◽  
B. Y. Lattimer ◽  
A. P. Mouritz
Keyword(s):  
Structural Analysis ◽  
Deformation And Failure ◽  
Compression Deformation ◽  
In Fire

scholarly journals Thermo-structural analysis of reinforced concrete beams

Fire Research ◽  
2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Dalilah Pires ◽  
Rafael C. Barros ◽  
Ricardo A. M. Silveira ◽  
Ígor J. M. Lemes ◽  
Paulo A. S. Rocha
Keyword(s):  
Reinforced Concrete ◽  
Structural Analysis ◽  
Composite Structures ◽  
Concrete Beams ◽  
Progressive Collapse ◽  
Plastic Hinge ◽  
Numerical Approach ◽  
Reinforced Concrete Beams ◽  
Inelastic Analysis ◽  
In Fire

The objective of this study is to simulate the behavior of reinforced concrete beams in fire situation. In order to achieve this objective, advanced numerical formulations were developed, implemented and evaluated. When exposed to high temperatures, the properties of the material deteriorate, resulting in the loss of strength and stiffness. To achieve the goal, two new modules within the Computational System for Advanced Structural Analysis were created: Fire Analysis and Fire Structural Analysis. The first one aims to determine the temperature field in the cross section of structural elements through thermal analysis by using the Finite Element Method (FEM). The second was designed to perform the second-order inelastic analysis of structures under fire using FEM formulations based on the Refined Plastic Hinge Method coupled with the Strain Compatibility Method. The results obtained of the nonlinear analyses of two reinforced concrete beams under high temperature were compared with the numerical and experimental solutions available in literature and were highly satisfactory. These results also showed that the proposed numerical approach can be used to study the progressive collapse of other reinforced concrete structures in fire situation and extended to the numerical analysis of composite structures under fire condition.

scholarly journals Concrete beams fire design using graphs

2013 ◽  
Vol 6 (4) ◽  
pp. 513-536
Author(s):  
G. B. M. L. Albuquerque ◽  
V. P. Silva
Keyword(s):  
Structural Analysis ◽  
Ambient Temperature ◽  
Concrete Beams ◽  
Bending Moment ◽  
Steel Reinforcement ◽  
Tabular Method ◽  
In Fire ◽  
Alternative Solutions ◽  
Brazilian Standard ◽  
Fire Design

The most expeditious method for the design of concrete beams under fire situation is the tabular method, presented by the Brazilian standard ABNT NBR 15200:2012. Albeit simple, this method constrains the engineer's work, as it prevents him to seek alternative solutions to the few tabulated values. Yet, the Brazilian standard allows employing more advanced methods. Hence, the purpose of this work was to perform a thermal and structural analysis of beams with several widths, heights, covers and diameters/layouts of steel reinforcement (upper and lower). From those results, graphs were constructed, associating the ratio between the applied bending moment in fire over the resistance bending moment at ambient temperature, for the fire resisting time of each situation. These graphs also allow taking into account the redistribution of moments from positive to negative, which will lead to savings in the solution found.

Thermomechanical Analysis System for Building Structures under Fire Based on MSCPATRAN Platform

2011 ◽  
Vol 243-249 ◽  
pp. 6159-6164
Author(s):  
Shi Cai Chen ◽  
Xiao Ming Tian ◽  
Chun Yang Liu
Keyword(s):  
Structural Analysis ◽  
Thermal Response ◽  
Shell Element ◽  
Experimental Tests ◽  
Thermomechanical Analysis ◽  
Response Analysis ◽  
Zone Model ◽  
Building Structures ◽  
Analysis System ◽  
In Fire

In order to analyze the behavior of building structures in a real fire, a numerical method is proposed, which employs fire zone model to simulate the fire growing and the temperature distributions in a firing room. Two computer programs are developed to predict the thermomechanical response of the structures, one for thermal response analysis, and another for structural analysis. The structural analysis program contains a fiber beam element and a layered shell element. These elements, validated against data from experimental tests, can be used to predict the response of beam/column and slabs in fire conditions. Based on these programs, a system for analyzing the behavior of structures under fire is developed on MSC/PATRAN platform. The behavior of building structures under fire can be simulated with this system and the results can be used as the reference for the fire safety analysis and assessment of general building structures under fire.

Structural analysis of the surface-layer protein of spirillum serpens by high-resolution electron microscopy

1983 ◽  
Vol 41 ◽  
pp. 738-739
Author(s):  
W. H. Wu ◽  
R. M. Glaeser
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Structural Analysis ◽  
High Resolution ◽  
Low Dose ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Surface Layer Protein ◽  
Morphological Unit ◽  
Resolution Electron

Spirillum serpens possesses a surface layer protein which exhibits a regular hexagonal packing of the morphological subunits. A morphological model of the structure of the protein has been proposed at a resolution of about 25 Å, in which the morphological unit might be described as having the appearance of a flared-out, hollow cylinder with six ÅspokesÅ at the flared end. In order to understand the detailed association of the macromolecules, it is necessary to do a high resolution structural analysis. Large, single layered arrays of the surface layer protein have been obtained for this purpose by means of extensive heating in high CaCl2, a procedure derived from that of Buckmire and Murray. Low dose, low temperature electron microscopy has been applied to the large arrays.As a first step, the samples were negatively stained with neutralized phosphotungstic acid, and the specimens were imaged at 40,000 magnification by use of a high resolution cold stage on a JE0L 100B. Low dose images were recorded with exposures of 7-9 electrons/Å2. The micrographs obtained (Fig. 1) were examined by use of optical diffraction (Fig. 2) to tell what areas were especially well ordered.

RNA polymerase: Preparation and structural analysis of helical polymers

1984 ◽  
Vol 42 ◽  
pp. 152-153
Author(s):  
E. Loren Buhle ◽  
Pamela Rew ◽  
Ueli Aebi
Keyword(s):  
Structural Analysis ◽  
Rna Polymerase ◽  
Molecular Level ◽  
X Ray Diffraction ◽  
Helical Polymers ◽  
X Ray ◽  
E Coli ◽  
The Past ◽  
Ordered Arrays ◽  
Low Ionic Strength

While DNA-dependent RNA polymerase represents one of the key enzymes involved in transcription and ultimately in gene expression in procaryotic and eucaryotic cells, little progress has been made towards elucidation of its 3-D structure at the molecular level over the past few years. This is mainly because to date no 3-D crystals suitable for X-ray diffraction analysis have been obtained with this rather large (MW ~500 kd) multi-subunit (α2ββ'ζ). As an alternative, we have been trying to form ordered arrays of RNA polymerase from E. coli suitable for structural analysis in the electron microscope combined with image processing. Here we report about helical polymers induced from holoenzyme (α2ββ'ζ) at low ionic strength with 5-7 mM MnCl2 (see Fig. 1a). The presence of the ζ-subunit (MW 86 kd) is required to form these polymers, since the core enzyme (α2ββ') does fail to assemble into such structures under these conditions.

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