PDF4PRO ⚡AMP

Modern search engine that looking for books and documents around the web

Example: dental hygienist

Introduction to Railroad Track Structural Design

BCR2A 09 Railroad Track Design Including Asphalt Trackbeds Pre-Conference WorkshopIntroduction to Railroad Track Structural DesignDon Uzarski, , Vertical Load Distribution, and DeflectionsComponents do not function independently!Each component layer must protect the one Distribution3 Deflection ProfileSource: Selig and Waters, Track Geotechnology and Substructure Management, 19944 Static vs. Dynamic Loads Dynamic loads higher Acceleration from speed Downward rotation of wheel Smaller wheels, faster rotation, more acceleration Speed/wheel influence Pv= P + P (AREMA)wherePv= Vertical Dynamic Load (lbs) = D33x VDwx 100D = Wheel diameter (in)V = Speed (MPH)P = Static Load (lbs) Larger wheels impose less influence Additional dynamic loads from impacts such as caused by wheel flat spots, rail discontinuities ( frog flangeways), Track transitions ( bridge approaches), Track condition, Wheel Diameters38 inches28 inches36 inches33 inches36 inches6 Track Stiffness Rail is assumed to be a beam on an elastic foundation Modulus of Track Elasticity, u (or k) ( Track Modulus)u = P/ whereu = Modulus of Track Elasticity (lbs/in/in)P = Wheel load per unit length of rail (lbs/in) = Unit of Track Deflection (in), less play or Track looseness oru = P/Swhereu = Modulus of Track Elasticity (lb/in/in)

– Some use entire concrete tie length in analyses; some use ⅔ length – Some use a rail seat force of Q o x 1.5 – Allowable bending stress in rail may vary – Allowable rail seat load for determining plate size may vary. Depends on wood specie. Range about 250 –400 psi. (AREMA recommends 200 psi).

Fullscreen Download

Tags:

  Design, Concrete, Stress, Allowable

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Spam in document Broken preview Other abuse

Transcription of Introduction to Railroad Track Structural Design

Documents from same domain

10 Design of Mufflers Silencers - University of Kentucky

web.engr.uky.edu

G The transmission loss is confined over a relatively narrow band of frequencies centered at the natural frequency of the resonator. Summary 2 . Design of Mufflers and Silencers Noise and Vibration Short Course ... chamber. The Simple Expansion Chamber ( ) ( ) ...

  Design, Transmissions, Simple, Expansion, Chamber, Loss, Silencers, Muffler, Transmission loss, Design of mufflers silencers, Simple expansion chamber

Spectre Circuit Simulator Reference - University of Kentucky

web.engr.uky.edu

This manual assumes that you are familiar with the development, design, and simulation of integrated circuits and that you have some familiarity with SPICE simulation. It contains information about the Spectre® circuit simulator. Spectre is an advanced circuit simulator that simulates analog and digital circuits at the differential equation level.

  Manual, Reference, Circuit, Respect, Simulators, Spectre circuit simulator reference

Introduction Finite Element Method of Analysis

web.engr.uky.edu

1 Finite Element Method of Analysis Introduction • Engineers model physical phenomena. • Analytical descriptions of physi-cal phenomena and processes

  Analysis, Introduction, Methods, Elements, Finite, Introduction finite element method of analysis, Finite element method of analysis introduction

Myers-Briggs Type Indicator (MBTI)

web.engr.uky.edu

Myers-Briggs Type Indicator (MBTI) The Myers-Briggs Type Indicator (MBTI), developed by Isabel Briggs Myers and her mother, Katharine Cook Briggs, is a well known and widely used personality

  Types, Myers, Briggs, Indicator, Mbti, Briggs myers, Myers briggs type indicator, The myers briggs type indicator

Analysis of Processes with Excel (APEx

web.engr.uky.edu

APEx runs in all versions of Excel supporting Visual Basic for Applications. At time of publication, this includes Excel 2010 and 2013 for Microsoft Windows, and Excel 2011 for MacOS. Permission to run macros is required to run APEx, and the Excel add-in Solver must be

  2010, Excel, Macro, Excel 2010

LECTURES IN ELEMENTARY FLUID DYNAMICS

web.engr.uky.edu

LECTURES IN ELEMENTARY FLUID DYNAMICS: Physics, Mathematics and Applications J. M. McDonough Departments of Mechanical Engineering and Mathematics

  Fluid, Dynamics, Fluid dynamics

Introduction to Rail Transportation

web.engr.uky.edu

North American rail network •6 large North American freight railroads –CSX & NS in eastern US –BNSF & UP in west –CN & CP in Canada & central US •KCS is a medium sized railroad in central US •Amtrak operates passenger trains primarily on freight railroads’ trackage throughout US (From Vantuono 2000)16 Major freight railroads

  Network, Rail, Network rail

LECTURES IN BASIC COMPUTATIONAL NUMERICAL ANALYSIS

web.engr.uky.edu

1.1. SOME BASIC FACTS FROM LINEAR ALGEBRA 3 Theorem 1.1 (Cauchy–Schwarz) Let S be an inner-product space with inner product h· ,·i and norm k· k2. If v,w ∈ S, then hv,wi ≤ kvk2 kwk2. (1.5) We have thus far introduced the 2-norm, the infinity norm and the inner product for spaces of finite-dimensional vectors.

  Analysis, Basics, Numerical, Numerical analysis

Statics of Structural Supports

web.engr.uky.edu

levered construction beam (c) along with their respective bending moment diagrams for a uniform load of 2 kips/ft. Note that the bending moments are most evenly divided into positive and negative regions for the three-span contin-uous beam and that the location of the internal hinges for the canti-levered constructed bridge resulted

  Levered

Train Energy, Power and Traffic Control

web.engr.uky.edu

• “Distributed power” is particularly useful for heavy freight trains because it enables longer trains and better control, particularly on grades. • The control circuits can be electrically connected so that a single operator can control multiple locomotives

  Power, Distributed, Distributed power

Related documents

Design and Analysis of Concrete Masonry and Precast ...

ncma.org

= allowable compressive stress of masonry due to flexure only, psi. F s = allowable tensile stress in reinforcing steel, psi. F v = allowable shear stress in masonry, psi. f v = computed shear stress due to design load, psi. f y = specified yield strength of steel for reinforcement, psi. h = height to apex of triangle for arching action, in. h m

  Design, Concrete, Stress, Allowable, Of concrete

General Overview of Post-Tensioned Concrete Design

pdhonline.com

Typically maximum fiber stress in tension controls design. It is my personal experience to design up to the rupture modulus of the concrete thereby avoiding the need to analyze the member as a transformed cracked section (i.e. use Ig). Service Stresses:

  Design, Concrete, Stress, Design concrete

Mechanical Properties of Concrete and Steel

www.uap-bd.edu

structural analysis and design point of view, RC is a complex composite material. It provides a unique coupling of two materials (concrete, steel) with entirely different mechanical properties. Stress-Strain Curve for Concrete Concrete is much stronger in compression than in tension (tensile strength is of the order of one-tenth of compressive

  Design, Concrete, Stress, Concrete concrete, Of concrete

Micropiles Design 101 - Structural Engineers

www.sefindia.org

30 m long single span, AASHTO Type IV precast – prestressed concrete girders with concrete deck. Design Example - Step 4 Preliminary Pile Detail CasingCasing 5.5 in diam. .375 in wall Plunge Length Bo n Centralizer Top of Dense Gravel Plunge Length B o Centralizer Top of Dense Gravel Case 1 Type B Reinforcing Bar 2.25 in Grade 520 d Zone Neat ...

  Design, Concrete

Design Of Heavy Duty Concrete Floor Slabs On Grade

d6s74no67skb0.cloudfront.net

2-1. Stresses. thermal expansion and contraction of the concrete The structural design of a concrete floor slab on grade is primarily controlled by the stresses caused by moving live loads and in some cases the stationary loads. Stresses in floor slabs on grade resulting from vehicular loads are a function of floor slab thickness, vehicle ...

  Design, Grade, Heavy, Duty, Floor, Concrete, Slab, Design of heavy duty concrete floor slabs on grade

Reinforced Concrete Spread Footing (Isolated Footing ...

structurepoint.org

Reinforced Concrete Spread Footing (Isolated Footing) Analysis and Design A square spread footing supports an 18 in. square column supporting a service dead load of 400 kips and a service live load of 270 kips. The column is built with 5000 psi concrete and has eight #9 Grade 60 longitudinal bars. Design

  Design, Concrete

Basics of Concrete Pavement Thickness Design

www.pecivilexam.com

• Proper design and construction are absolutely necessary if the pavement is to perform. • Must be uniform throughout pavement’s life. • Poor subgrade/subbase preparation can not be overcome with thickness. • Any concrete pavement, built of any thickness, will have problems on a poorly designed and constructed subgrade or subbase.

  Design, Concrete, Pavement, Concrete pavement, Of concrete pavement

Structural Steel Design - Free

freeit.free.fr

measured as the slope of the material’s stress-strain curve. With reference to Figure 3.1 in which uniaxial engineering stress-strain curves obtained from coupon tests for various grades of steels are shown, it is seen that the modulus of elasticity, E, …

  Design, Stress

Related search queries

Design, Of Concrete, Allowable, Stress, Concrete Design, Concrete, Concrete Concrete, Design Of Heavy Duty Concrete Floor Slabs On Grade, Of Concrete Pavement, Concrete pavement