Structural analysis of bridges with time-variant modulus of elasticity under moving loads

2021 ◽

Vol 9 (VII) ◽

pp. 188-192

Author(s):

Ms. Shrunkhala Barapatre

Keyword(s):

Structural Analysis ◽

Open Source ◽

Open Source Software ◽

Road Traffic ◽

Moving Loads ◽

The Road ◽

The Moment ◽

Segmental Bridge ◽

The Way

A bridge is a structure providing passage over an obstacle without closing the way beneath. The required passage may be for a road, a railway, pedestrians, a canal or a pipeline. The obstacle to be crossed may be a river, a road, railway or a valley. In other words, bridge is a structure for carrying the road traffic or other moving loads over a depression or obstruction such as channel, road or railway. The structural analysis is carried out using BRIDGELINK software. Total 5 models are modeled in the Bridgelink software which is open source software. The moment, shear, rotation, deflection, reaction and stresses are computed for all the models.

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The Influence of Ratio of Reinforcement to Modulus of Elasticity of Reinforce Concrete Component

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.859.233 ◽

2013 ◽

Vol 859 ◽

pp. 233-237

Author(s):

Tie Jun Qu ◽

Rong Huan Xu

Keyword(s):

Experimental Study ◽

Structural Analysis ◽

Dynamic Response ◽

Dynamic Characteristics ◽

Modulus Of Elasticity ◽

Plain Concrete ◽

Reinforce Concrete ◽

Present Value ◽

Analysis And Design ◽

Concrete Component

Modulus of elasticity is an important mechanical parameter in analysis and design of reinforce concrete structures. The present value of modulus of elasticity ，which has rare relation with ratio of reinforcement ，is based on plain concrete. Authors deduced an equation between modulus of elasticity and ratio of reinforcement, and then an experimental study was conducted on 11 groups’ component of reinforce concrete with different ratio of reinforcement. At last, an equation for modulus of elasticity of different ratio of reinforcement determined by regression, using least squared method, was described. A cantilever, whose dynamic characteristics and response were calculated, was taken as an example to analyze influence of ratio of reinforcement on the structural analysis .Result shows that ratio of reinforcement has effect on modulus of elasticity . Moreover, if general modulus is ignored when calculate dynamic response, it will cause deviation.

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Moving Loads Bridge Response: Structural Analysis and Eurocode Provisions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.629.409 ◽

2012 ◽

Vol 629 ◽

pp. 409-417 ◽

Cited By ~ 3

Author(s):

Alessio Pipinato

Keyword(s):

Structural Analysis ◽

Suspension Bridges ◽

Moving Loads ◽

Efficient Utilization ◽

Long Span Bridges ◽

The Past ◽

Long Span ◽

Aesthetic Appearance ◽

Loads Analysis ◽

Code Provisions

Moving loads analysis in bridges are currently undertaken as a result of code provisions. However, this relevant part of the structural analysis in bridges, could be implemented with a wide variety of instruments and analysis. This paper deals with the response of bridges to moving loads: in the first part, in order to take advantage of the high amount of works performed in the past, a review of the principle method for the dynamic response of bridges to moving loads are outlined; in the second part code provisions of Eurocode are presented. Current short and medium span bridge types are analyzed, including long span bridges, as cable-stayed and suspension bridges, having gained much popularity in recent decades for their aesthetic appearance, efficient utilization of structural materials and other notable advantages. A wide amount of references from the analyzed literature are included.

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

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100077268 ◽

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.

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RNA polymerase: Preparation and structural analysis of helical polymers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010011091x ◽

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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Interpreting HVEM of muscle-cell impulse networks

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010012103x ◽

1992 ◽

Vol 50 (1) ◽

pp. 126-127

Author(s):

Paul DeCosta ◽

Kyugon Cho ◽

Stephen Shemlon ◽

Heesung Jun ◽

Stanley M. Dunn

Keyword(s):

Structural Analysis ◽

Muscle Cell ◽

Electron Micrographs ◽

Relative Size ◽

Automatic Classification ◽

Nerve Fibers ◽

Analysis Algorithm ◽

Structural Networks

Introduction: The analysis and interpretation of electron micrographs of cells and tissues, often requires the accurate extraction of structural networks, which either provide immediate 2D or 3D information, or from which the desired information can be inferred. The images of these structures contain lines and/or curves whose orientation, lengths, and intersections characterize the overall network.Some examples exist of studies that have been done in the analysis of networks of natural structures. In, Sebok and Roemer determine the complexity of nerve structures in an EM formed slide. Here the number of nodes that exist in the image describes how dense nerve fibers are in a particular region of the skin. Hildith proposes a network structural analysis algorithm for the automatic classification of chromosome spreads (type, relative size and orientation).

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