CLOSED-FORM BACK-CALCULATION OF RIGID-PAVEMENT PARAMETERS. flexible pavement layers, although it can be equally applied to rigid pavements. The field procedure, data analysis The field procedure, data analysis technique and the interpretation of this method are described in this paper., THE STIFFNESS MODULUS OF ASPHALT CONCRETE FOR DESIGN LIFE PREDICTION OF PAVEMENT UNDER TROPICAL CONDITION Research Student Transport & Road Assessment Centre.

### THE INFLUENCE OF PAVEMENT STIFFNESS ON VEHICLE FUEL

Road Pavement Stiffness Determination using SASW Method. 1 closed-form back-calculation of rigid-pavement parameters 2 using barycentric horizontal distance of deflection basin 3 4 shifu liu, ph.d. candidate, Anchor: #i1025104 Section 4: FPS21 Modulus Inputs and Backcalculation Methodology Anchor: #i1039024 4.1 Overview of Modulus Inputs. Each material layer used in the structure will have a modulus input that shall characterize the average seasonal stiffness of that material over the course of the year..

Pavement Interactive was developed by the Pavement Tools Consortium, a partnership between several state DOTs, the FHWA, and the University of Washington, as part of their effort to further develop and use computer-based pavement tools. Let us use this formula to analyze the pavement situation when we have a two-layer pavement: the п¬Ѓrst layer starts at the surface and ends at the depth z 0 , and then the second layer starts.

CORPS OF ENGINEERS DESIGN METHOD FOR CONCRETE BLOCK PAVEMENTS Raymond S. Rollings U. S. Army Engineer Waterways Experiment Station Vicksburg, Mississippi, U.S.A. SUMMARY The U. S. Ar~y Corps of Engineers has adopted a design procedure for concrete block pavements that combines thelr current California Bearing Ratio flexible pavement design method with an equivalent вЂ¦ Modulus and Thickness of the Pavement Surface Layer from SASW Tests JosE M. RoESSET, DER-WEN CHANG, KENNETH H . thickness of the pavement surface layer is confined to this layer (Figure 2b). Therefore, the wave velocity is affected by the stiffness of the surface layer and not by the lower layers. The velocity of a wave with a wavelength of several feet is influenced by the properties вЂ¦

a rigid pavement depend upon the relative stiffness of the slab and the subgrade. Punmia et.al (2005) have described the development of a design procedure for rigid highway pavement by Portland Cement Stiffness (dynamic modulus Edyn) of the bituminous layers was derived from a diagram in the Shell Design Manual for a standard asphalt (вЂњmodel asphaltвЂќ) at a

Finite Element Investigation of the Deterioration of Doweled Rigid Pavements Ziad Ghauch Undergraduate student, Department of Civil Engineering, Lebanese American University, better on an asphalt pavement (flexible) and sometimes better on a concrete pavement (rigid). Moreover, these measurements (of fuel consumption) are affected by several factors, in addition to the pavement stiffness.

Stresses in CC Pavement вЂў Temperature Stresses вЂ“ Due to the temperature differential between the top and bottom of the slab, curling stresses (similar to APPENDIX-A DESIGN OF A RIGID PAVEMENT FOR RURAL ROAD AND NATIONAL HIGHWAY DEVELOPMENT DESIGN OF A NATIONAL HIGHWAY ROAD PAVEMENT (IRC: 58-2002) A cement concrete pavement is designed for a two- lane two-way National Highway in Gujarat State. The total two-way traffic is 3000 commercial vehicles per day (cvpd) at the end of the construction period. Design вЂ¦

METHODOLOGY AND CALIBRATION OF FATIGUE TRANSFER FUNCTIONS FOR MECHANISTIC-EMPIRICAL FLEXIBLE PAVEMENT DESIGN by Angela L. Priest1, Kimley-Horn and Associates, Inc. CH 4: Deflection and Stiffness Stress analyses are done to ensure that machine elements will not fail due to stress levels exceeding the allowable values. However, since we are dealing with deformable bodies (not rigid), deflections should be considered also where they are in many cases more limiting than stresses. Take for example shafts where excessive deflection will interfere with the

### Stiffness and Strength Tests Pavement Interactive

Stiffness and Strength Tests Pavement Interactive. Finite Element Modeling for Rigid Pavement Joints, Report II: Model Development March 1998 Final Report This document is available to the U.S. public through the National Technical Information Service (NTIS), Springfield, Virginia 22161. U.S. Department of Transportation Federal Aviation Administration . NOTICE This document is disseminated under the sponsorship of the U.S. Department of, mixtures directly and then the whole pavement stiffness will be influenced. As a result, the temperatures have an effect on pavement deflection finally. The variation of asphalt pavement deflection caused by the variation of surface course temperatures can use temperature modified coefficient to deflection K to represent. K can be determined by: (10) where, w20: Pavement вЂ¦.

Determining Stiffness Coefficients & Elastic Moduli of. The serviceability and longevity of rigid pavement constructions depend on the rate of pavement deterioration which is a function of factors such as material properties, climatic effects and vehicular load characteristics., Rigid Pavement Analytical Solutions Numerical Solutions Assumes slab and subgrade are in contact Based on partial contact between the slab and subgrade GoldbeckвЂ™s Formula WestergaardвЂ™s Analysis PickettвЂ™s Analysis Discrete Element Methods Finite Element Methods Road Tests Maryland Road Test Road Tests WASHO Road Tests (Idaho) AASHO Road Tests (Ottawa, Illinois) Long Term Pavement.

### Effect of Panel Size and Radius of Relative Stiffness on

CORPS OF ENGINEERS DESIGN METHOD FOR CONCRETE BLOCK. THE STIFFNESS MODULUS OF ASPHALT CONCRETE FOR DESIGN LIFE PREDICTION OF PAVEMENT UNDER TROPICAL CONDITION Research Student Transport & Road Assessment Centre 76 Ahmed Ebrahim Abu El-Maaty Behiry: Characterization of the Layered Pavement by Modelling and Calibration of Resilient Modulus soil support value (SSV)..

The stiffness of asphalt-aggregate mixes is of paramount importance in determining how well a pavement performs and is fundamental to the analysis of pavement response to traffic loading. Rigid Pavement Design вЂўIRC:58-1988/2002 вЂњGuidelines for the Design of Plain Jointed Rigid Pavements for HighwaysвЂќ вЂўIRC:15-2002 вЂњStandard Specifications and Code of Practice for Construction of Concrete RoadsвЂќ Factors Governing Rigid Pavement Design вЂў Design Wheel Load (5100 Kg) вЂў Traffic Intensity вЂў Annual Growth Rate of Traffic (CVPD) вЂў Temperature Differential

The stiffness (EI/L) of each member in a joint determines how rigid or flexible it is. To find k, the relative stiffness, G or , must be found for both ends, plotted on the alignment charts, and connected by a line for braced and unbraced fames. Rigid Pavement Analytical Solutions Numerical Solutions Assumes slab and subgrade are in contact Based on partial contact between the slab and subgrade GoldbeckвЂ™s Formula WestergaardвЂ™s Analysis PickettвЂ™s Analysis Discrete Element Methods Finite Element Methods Road Tests Maryland Road Test Road Tests WASHO Road Tests (Idaho) AASHO Road Tests (Ottawa, Illinois) Long Term Pavement

CHAPTER 5: DESIGN METHODOLOGY Both flexible and rigid pipe depend on proper backfill. Backfill characteristics, and also trench configuration in the case of rigid pipe, enter into the design procedures. Current mechanical empirical-based pavement design requires use of the mechanical properties of pavement materials. For quantitative evaluations of the mechanical properties (i.e. stiffness and

A two-step method for stiffness distribution design with application to perpetual pavements is proposed. In the first step resultant stiffness of asphalt concrete layers is estimated using nomograms obtained via solution of three-dimensional problem of a layered half-space. Thickness of pavement using MCleods or Plate Load Test Method T = K log10 P S Where P вЂ“ wheel load S вЂ“ subgrade pressure K вЂ“ constant value Radius of Relative stiffness of pavement вЂ¦

Lecture 3: Stresses in Rigid Pavements . Nature of Responses under Flexible and Rigid Plates Flexible plate: Uniform Contact Pressure Variable Deflection Profile Rigid Plate plate: Non-Uniform Contact Pressure Equal Deflection Flexible Plate Rigid Plate . Comparison of Deflections at the Surface Rigid vs. Flexible Plate The deflection under a rigid plate is 79% of that under a flexible plate CH 4: Deflection and Stiffness Stress analyses are done to ensure that machine elements will not fail due to stress levels exceeding the allowable values. However, since we are dealing with deformable bodies (not rigid), deflections should be considered also where they are in many cases more limiting than stresses. Take for example shafts where excessive deflection will interfere with the

The stiffness (EI/L) of each member in a joint determines how rigid or flexible it is. To find k, the relative stiffness, G or , must be found for both ends, plotted on the alignment charts, and connected by a line for braced and unbraced fames. highway pavement (flexible and rigid pavements). One of the parameters obtained from the field plate load test is the spring constant/ modulus of subgrade reaction,

CORPS OF ENGINEERS DESIGN METHOD FOR CONCRETE BLOCK PAVEMENTS Raymond S. Rollings U. S. Army Engineer Waterways Experiment Station Vicksburg, Mississippi, U.S.A. SUMMARY The U. S. Ar~y Corps of Engineers has adopted a design procedure for concrete block pavements that combines thelr current California Bearing Ratio flexible pavement design method with an equivalent вЂ¦ Method for Prediction of Flexible Pipe Deflection The horizontal deflection is the change in the horizontal diameter of the pipe (i.e., a horizontal line at the pipe springline).

## Research Article Asphalt Pavement Deflection due to a

How to Determine the Stiffness of the Pavement's Upper. Flexural Strength вЂ“ A Measure to Control Quality of Rigid Concrete Pavements Jayant Damodar Supe* & Dr. M.K.Gupta** *Associate Professor , Dept of Civil Engg. SSIET , Durg. **Professor & Head Dept. of Civil Engg. BIT , Durg . Abstract- Flexural strength is a measure of the tensile strength of an unreinforced concrete beam or slab to resist failure in bending. It is useful in knowing the, rigid pavements) require asymmetry - not available in LEM. Information on slip generally not available вЂ“ influence can be dramatic вЂ“ ( BISAR program accommodates for the slip and inter-.

### STIFFNESS OF ASPHALT- AGGREGATE MIXES

FLEXURAL STRENGTH вЂ“ A MEASURE TO CONTROL QUALITY OF RIGID. Stiffness (dynamic modulus Edyn) of the bituminous layers was derived from a diagram in the Shell Design Manual for a standard asphalt (вЂњmodel asphaltвЂќ) at a, APPENDIX-A DESIGN OF A RIGID PAVEMENT FOR RURAL ROAD AND NATIONAL HIGHWAY DEVELOPMENT DESIGN OF A NATIONAL HIGHWAY ROAD PAVEMENT (IRC: 58-2002) A cement concrete pavement is designed for a two- lane two-way National Highway in Gujarat State. The total two-way traffic is 3000 commercial vehicles per day (cvpd) at the end of the construction period. Design вЂ¦.

METHODOLOGY AND CALIBRATION OF FATIGUE TRANSFER FUNCTIONS FOR MECHANISTIC-EMPIRICAL FLEXIBLE PAVEMENT DESIGN by Angela L. Priest1, Kimley-Horn and Associates, Inc. Let us use this formula to analyze the pavement situation when we have a two-layer pavement: the п¬Ѓrst layer starts at the surface and ends at the depth z 0 , and then the second layer starts.

Let us use this formula to analyze the pavement situation when we have a two-layer pavement: the п¬Ѓrst layer starts at the surface and ends at the depth z 0 , and then the second layer starts. Lecture 3: Stresses in Rigid Pavements . Nature of Responses under Flexible and Rigid Plates Flexible plate: Uniform Contact Pressure Variable Deflection Profile Rigid Plate plate: Non-Uniform Contact Pressure Equal Deflection Flexible Plate Rigid Plate . Comparison of Deflections at the Surface Rigid vs. Flexible Plate The deflection under a rigid plate is 79% of that under a flexible plate

the rolling depending on the pavement stiffness, speed and load. The study also assesses the effect of the vertical deflection, induced by the tyre, on overall energy dissipation in pavement. He considered rigid pavement slab as a thin elastic plate resting on soil sub-grade, which is assumed to be a dense liquid. So, here the upward reaction is assumed to be proportional to the deflection, i.e. p = K.d, where K is a constant defined as modulus of subgrade reaction. Units of K are kg/cm^3.

stiffness or subgrade modulus of resilience, as discussed in Section 203.1, and the stiffness, or elastic modulus, and thickness of the subbase material. The pavement design process requires the designer to Let us use this formula to analyze the pavement situation when we have a two-layer pavement: the п¬Ѓrst layer starts at the surface and ends at the depth z 0 , and then the second layer starts.

He considered rigid pavement slab as a thin elastic plate resting on soil sub-grade, which is assumed to be a dense liquid. So, here the upward reaction is assumed to be proportional to the deflection, i.e. p = K.d, where K is a constant defined as modulus of subgrade reaction. Units of K are kg/cm^3. better on an asphalt pavement (flexible) and sometimes better on a concrete pavement (rigid). Moreover, these measurements (of fuel consumption) are affected by several factors, in addition to the pavement stiffness.

Rigid pavement posses note worthy flexural strength rigid kit has the slab action which is capable of transmitting the wheel load stress though a wide area below. As the rigid pavement slab has tensile strength, tensile stresses are developed due to the bending of the slab under wheel load and temperature variations. The c/c (cement concrete) pavement slab can very well serve as a wearing Table 1 HS-20 Live Loads for Rigid Pavement (lb/in2) Method for Prediction of Flexible Pipe Deflection 6 change in vertical diameter divided by the nominal pipe diameter, expressed as a percentage. The shape of a flexible pipe goes through several changes during the installation of a pipeline. Generally, the pipe is considered to deform from a perfect circle to an ellipse due to loading

2 Introduction Background The use of joints in rigid pavements allows thermal expansion and contraction of the concrete slabs at the expense of breaking the continuity of the pavement structure. Pavement surface deflection measurements are the primary means of evaluating a flexible pavement structure and rigid pavement load transfer. Although other measurements can be made that reflect (to some degree) a pavementвЂ™s structural condition, surface deflection is an important pavement evaluation method because the magnitude and shape of

highway pavement (flexible and rigid pavements). One of the parameters obtained from the field plate load test is the spring constant/ modulus of subgrade reaction, Ken Youssefi Engineering 10, SJSU 22 Concept of Area Moment of Inertia The Area Moment of Inertia, I, is a term used to describe the capacity of a cross-section (profile) to resist bending.

Method for Prediction of Flexible Pipe Deflection The horizontal deflection is the change in the horizontal diameter of the pipe (i.e., a horizontal line at the pipe springline). AASHTO Pavement Thickness Design Guide When designing pavement thickness for flexible and rigid pavements, the following considerations should be used.

the rolling depending on the pavement stiffness, speed and load. The study also assesses the effect of the vertical deflection, induced by the tyre, on overall energy dissipation in pavement. 76 Ahmed Ebrahim Abu El-Maaty Behiry: Characterization of the Layered Pavement by Modelling and Calibration of Resilient Modulus soil support value (SSV).

2 Introduction Background The use of joints in rigid pavements allows thermal expansion and contraction of the concrete slabs at the expense of breaking the continuity of the pavement structure. CHAPTER 5: DESIGN METHODOLOGY Both flexible and rigid pipe depend on proper backfill. Backfill characteristics, and also trench configuration in the case of rigid pipe, enter into the design procedures.

THE STIFFNESS MODULUS OF ASPHALT CONCRETE FOR DESIGN LIFE PREDICTION OF PAVEMENT UNDER TROPICAL CONDITION Research Student Transport & Road Assessment Centre CHAPTER 5: DESIGN METHODOLOGY Both flexible and rigid pipe depend on proper backfill. Backfill characteristics, and also trench configuration in the case of rigid pipe, enter into the design procedures.

### Development of Design Chart for Rigit Pavement By Finite

FLEXURAL STRENGTH вЂ“ A MEASURE TO CONTROL QUALITY OF RIGID. A numerical iterative procedure based on finite element method has been presented for analyzing the dynamic response of pavement to moving load resting on a nonlinear subgrade., Finite Element Investigation of the Deterioration of Doweled Rigid Pavements Ziad Ghauch Undergraduate student, Department of Civil Engineering, Lebanese American University,.

### Finite Element Investigation of the Deterioration of

(PDF) Finite Element Analysis of Rigid Pavement on a. APPENDIX-A DESIGN OF A RIGID PAVEMENT FOR RURAL ROAD AND NATIONAL HIGHWAY DEVELOPMENT DESIGN OF A NATIONAL HIGHWAY ROAD PAVEMENT (IRC: 58-2002) A cement concrete pavement is designed for a two- lane two-way National Highway in Gujarat State. The total two-way traffic is 3000 commercial vehicles per day (cvpd) at the end of the construction period. Design вЂ¦ Current mechanical empirical-based pavement design requires use of the mechanical properties of pavement materials. For quantitative evaluations of the mechanical properties (i.e. stiffness and.

a rigid pavement depend upon the relative stiffness of the slab and the subgrade. Punmia et.al (2005) have described the development of a design procedure for rigid highway pavement by Portland Cement вЂў Concrete is a rigid material and design objective is to ensure вЂў i) Stresses imposed by traffic and induced by thermal expansion and contraction can be endured by the concrete without it fracturing.. 2/24/2012 8. Characteristics вЂў ii) Account for stresses due to variation in temperature. вЂ“ Spacing of Expansion and contraction joints, are determined by the temperature variation range

stiffness or subgrade modulus of resilience, as discussed in Section 203.1, and the stiffness, or elastic modulus, and thickness of the subbase material. The pavement design process requires the designer to Current mechanical empirical-based pavement design requires use of the mechanical properties of pavement materials. For quantitative evaluations of the mechanical properties (i.e. stiffness and

Therefore, it is necessary to consider the effect of the size of slab panel and radius of relative stiffness, while designing the concrete pavement. Keywords Concrete pavement Edge stress Slab thickness Radius of relative stiffness Soil structure interaction Simplified approach Rigid Pavement Design вЂўIRC:58-1988/2002 вЂњGuidelines for the Design of Plain Jointed Rigid Pavements for HighwaysвЂќ вЂўIRC:15-2002 вЂњStandard Specifications and Code of Practice for Construction of Concrete RoadsвЂќ Factors Governing Rigid Pavement Design вЂў Design Wheel Load (5100 Kg) вЂў Traffic Intensity вЂў Annual Growth Rate of Traffic (CVPD) вЂў Temperature Differential

rigid pavements) require asymmetry - not available in LEM. Information on slip generally not available вЂ“ influence can be dramatic вЂ“ ( BISAR program accommodates for the slip and inter- Current mechanical empirical-based pavement design requires use of the mechanical properties of pavement materials. For quantitative evaluations of the mechanical properties (i.e. stiffness and

Finite Element Modeling for Rigid Pavement Joints, Report II: Model Development March 1998 Final Report This document is available to the U.S. public through the National Technical Information Service (NTIS), Springfield, Virginia 22161. U.S. Department of Transportation Federal Aviation Administration . NOTICE This document is disseminated under the sponsorship of the U.S. Department of He considered rigid pavement slab as a thin elastic plate resting on soil sub-grade, which is assumed to be a dense liquid. So, here the upward reaction is assumed to be proportional to the deflection, i.e. p = K.d, where K is a constant defined as modulus of subgrade reaction. Units of K are kg/cm^3.

Evaluation of the stiffness modulus of bituminous mixtures using laboratory tests (NAT) validate by field back-analysis J. Neves Department of Civil Engineering and Architecture, CESUR , IST, Technical University of Lisbon, Portugal вЂў Concrete is a rigid material and design objective is to ensure вЂў i) Stresses imposed by traffic and induced by thermal expansion and contraction can be endured by the concrete without it fracturing.. 2/24/2012 8. Characteristics вЂў ii) Account for stresses due to variation in temperature. вЂ“ Spacing of Expansion and contraction joints, are determined by the temperature variation range

Rigid Pavement Analytical Solutions Numerical Solutions Assumes slab and subgrade are in contact Based on partial contact between the slab and subgrade GoldbeckвЂ™s Formula WestergaardвЂ™s Analysis PickettвЂ™s Analysis Discrete Element Methods Finite Element Methods Road Tests Maryland Road Test Road Tests WASHO Road Tests (Idaho) AASHO Road Tests (Ottawa, Illinois) Long Term Pavement Finite Element Investigation of the Deterioration of Doweled Rigid Pavements Ziad Ghauch Undergraduate student, Department of Civil Engineering, Lebanese American University,

Modulus and Thickness of the Pavement Surface Layer from SASW Tests JosE M. RoESSET, DER-WEN CHANG, KENNETH H . thickness of the pavement surface layer is confined to this layer (Figure 2b). Therefore, the wave velocity is affected by the stiffness of the surface layer and not by the lower layers. The velocity of a wave with a wavelength of several feet is influenced by the properties вЂ¦ Finite Element Modeling for Rigid Pavement Joints, Report II: Model Development March 1998 Final Report This document is available to the U.S. public through the National Technical Information Service (NTIS), Springfield, Virginia 22161. U.S. Department of Transportation Federal Aviation Administration . NOTICE This document is disseminated under the sponsorship of the U.S. Department of

Evaluation of the stiffness modulus of bituminous mixtures using laboratory tests (NAT) validate by field back-analysis J. Neves Department of Civil Engineering and Architecture, CESUR , IST, Technical University of Lisbon, Portugal the rolling depending on the pavement stiffness, speed and load. The study also assesses the effect of the vertical deflection, induced by the tyre, on overall energy dissipation in pavement.

Flexural Strength вЂ“ A Measure to Control Quality of Rigid Concrete Pavements Jayant Damodar Supe* & Dr. M.K.Gupta** *Associate Professor , Dept of Civil Engg. SSIET , Durg. **Professor & Head Dept. of Civil Engg. BIT , Durg . Abstract- Flexural strength is a measure of the tensile strength of an unreinforced concrete beam or slab to resist failure in bending. It is useful in knowing the better on an asphalt pavement (flexible) and sometimes better on a concrete pavement (rigid). Moreover, these measurements (of fuel consumption) are affected by several factors, in addition to the pavement stiffness.

Therefore, it is necessary to consider the effect of the size of slab panel and radius of relative stiffness, while designing the concrete pavement. Keywords Concrete pavement Edge stress Slab thickness Radius of relative stiffness Soil structure interaction Simplified approach stiffness or subgrade modulus of resilience, as discussed in Section 203.1, and the stiffness, or elastic modulus, and thickness of the subbase material. The pavement design process requires the designer to

CORPS OF ENGINEERS DESIGN METHOD FOR CONCRETE BLOCK PAVEMENTS Raymond S. Rollings U. S. Army Engineer Waterways Experiment Station Vicksburg, Mississippi, U.S.A. SUMMARY The U. S. Ar~y Corps of Engineers has adopted a design procedure for concrete block pavements that combines thelr current California Bearing Ratio flexible pavement design method with an equivalent вЂ¦ Evaluation of the stiffness modulus of bituminous mixtures using laboratory tests (NAT) validate by field back-analysis J. Neves Department of Civil Engineering and Architecture, CESUR , IST, Technical University of Lisbon, Portugal

pavement being tested and the pavement being designed; however, backcalculated dynamic k- values need to be reduced by a factor of approximately two to estimate a вЂ¦ CORPS OF ENGINEERS DESIGN METHOD FOR CONCRETE BLOCK PAVEMENTS Raymond S. Rollings U. S. Army Engineer Waterways Experiment Station Vicksburg, Mississippi, U.S.A. SUMMARY The U. S. Ar~y Corps of Engineers has adopted a design procedure for concrete block pavements that combines thelr current California Bearing Ratio flexible pavement design method with an equivalent вЂ¦