Author: Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 156
Book Description
Multiple-wheel Heavy Gear Load Pavement Tests
Author: Multiple-wheel Heavy Gear Load Pavement Tests
Author: Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 236
Book Description
Flexible and rigid pavements were constructed and tested to obtain data on pavement and soil behavior under large aircraft loadings for use in developing criteria for evaluating and designing airfield pavements subjected to multiple-wheel heavy gear loads (WMHGL). The test sections incorporated instrumentation systems designed to determine the response of the pavement structures to static, dynamic (slowly moving), and vibratory loads and to traffic by full prototype loadings of a 12-wheel assembly (one main gear of a C-5A aircraft), a twin-tandem assembly (one twin-tandem component of the Boeing 747 assembly), and a single wheel. Analysis of static load response data from the flexible pavement instrumentation program resulted in the establishment of maximum elastic deflection and vertical elastic stress versus depth curves. Comparisons showed that the same relationships were true for static and dynamic load tests, as well as for speed tests. The findings for the rigid pavement test section indicated that the Westergaard algorithm can be used for reasonable predictio of pavement response to test loadings. The data from the instrumentation program and the traffic tests were used in the analysis of the flexible and rigid pavement test sections. The analysis resulted in a modification of the basic flexible pavement CBR design method. (Author).
Multiple-wheel Heavy Gear Load Pavement Tests
Author: George M. HammittPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 124
Book Description
Multiple-wheel Heavy Gear Load Pavement Tests
Author: Multiple-Wheel Heavy Gear Load Pavement Tests. Volume III, Part B. Presentation and Initial Analysis of Stress-Strain Deflection and Vibratory Measurements. Data and Analysis
Author: Richard H. LedbetterPublisher:
ISBN:
Category :
Languages : en
Pages : 547
Book Description
Flexible and rigid pavement test sections were constructed and tested to gain information on pavement and soil behavior under large aircraft loadings. These test sections incorporated instrumentation systems designed to deteermine the response of the pavement structures of static, dynamic (slowly moving), and vibratory loads and to traffic by full prototype loadings. This volume covers data reduction, analysis, and the findings of the instrumentation and vibratory testing programs; Appendixes A and B contain details of instrumentation measurements for flexible and rigid pavements, respectively. (Author).
Multiple-Wheel Heavy Gear Load Pavement Tests. Volume III. Part A. Presentation and Initial Analysis of Stress-Strain Deflection and Vibratory Measurements - Instrumentation
Author: Richard H. LedbetterPublisher:
ISBN:
Category :
Languages : en
Pages : 159
Book Description
Flexible and rigid pavement test sections were constructed and tested to gain information on pavement and soil behavior under large aircraft loadings. These test sections incorporated instrumentation systems designed to determine the response of the pavement structures to static, dynamic (slowly moving), and vibratory loads and to traffic by full prototype loadings. The components of the instrumentation systems, their installation, and the test programs are described in this volume. (Author).
Instruction Report
Author: Waterways Experiment Station (U.S.)Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 104
Book Description
Procedures for Development of CBR Design Curves
Author: A. Taboza PereiraPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 100
Book Description
Significant Findings from Full-scale Accelerated Pavement Testing
Author: Frederick HugoPublisher: Transportation Research Board
ISBN: 0309069742
Category : Accelerated life testing
Languages : en
Pages : 213
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 325: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes the findings from the various experimental activities associated with full-scale accelerated pavement testing programs.
Ratiocinative Design Criteria for Membrane-enveloped Fine-grained Soil Layers
Author: George M. HammittPublisher:
ISBN:
Category : Membranes (Technology)
Languages : en
Pages : 216
Book Description
This investigation consists of full-scale testing, laboratory evaluation, and presentation of improved design criteria using membrane-enveloped fine-grained soil (MESL) within pavement layers. The research provides a description of proven materials and necessary construction techniques. Cost predictions are developed using these materials and techniques and predictions are compared with actual costs. Material characterization was performed in the laboratory and field using dynamic vibratory testing. The characteristics of materials employed in a full-scale MESL test section were used in a structural analysis of this type of load supporting media subjected to moving repetitive loadings. This analysis of stress conditions was facilitated by computer solution. Limiting criteria based on the shearing strain in the subgrade and the number of stress applications were developed as failure criteria. These criteria were formulated using performance data and model analyses. A design method using materials characterization, structural analysis, and failure criteria was presented to facilitate incorporation of a MESL technique into the design engineer's repertoire.