Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved 3-D finite element (FE) models were developed for analysis of (1) precast prestressed concrete pavement (PPCP) with consideration of the effects of longitudinal and transverse prestress forces, (2) jointed plain concrete pavement (JPCP) containing RAP with incorporation of the actual stress-strain characteristics of the concrete, (3) JPCP, which models dowel bars with actual bar dimensions and properties, and (4) continuously reinforced concrete pavement (CRCP), which analyzes the horizontal cracking potential under environmental and traffic loading conditions. Verification of the FE models was accomplished through comparison with measured falling weight deflectometer (FWD) deflection basins and strain data from test slabs. Parametric analyses on the effects of various design parameters on the potential performance of the concrete pavements were also conducted. A user-friendly interface software which prompts for user inputs and generates an input file for the developed software was developed for use in the analysis of JPCP. User-friendly guides were also developed for input files for analysis of PPCP, JPCP, CRCP, and JPCP with dowel joints. Various strain sensors were evaluated in the laboratory and also in full-size concrete test slabs subjected to HVS loading. The developed FE models were validated and recommended for use. Fiber optic and electrical resistance strain gauge can be used to measure dynamic strains in concrete slabs. Fiber optic and vibrating wire strain gauge can be used to measure static and long-term strains in concrete slabs. It is recommended that a series of 5 to 7 uniformly spaced strain gauges be placed at and around the wheel path on the test slab in order to be able to capture the location of the applied load and the maximum strain caused by the applied load. The use of the critical stress-analysis and the computed maximum stress-to-strength ratio to assess the potential performance of concrete pavement slabs is recommended.
Improved 3-D finite element (FE) models were developed for analysis of (1) precast prestressed concrete pavement (PPCP) with consideration of the effects of longitudinal and transverse prestress forces, (2) jointed plain concrete pavement (JPCP) containing RAP with incorporation of the actual stress-strain characteristics of the concrete, (3) JPCP, which models dowel bars with actual bar dimensions and properties, and (4) continuously reinforced concrete pavement (CRCP), which analyzes the horizontal cracking potential under environmental and traffic loading conditions. Verification of the FE models was accomplished through comparison with measured falling weight deflectometer (FWD) deflection basins and strain data from test slabs. Parametric analyses on the effects of various design parameters on the potential performance of the concrete pavements were also conducted. A user-friendly interface software which prompts for user inputs and generates an input file for the developed software was developed for use in the analysis of JPCP. User-friendly guides were also developed for input files for analysis of PPCP, JPCP, CRCP, and JPCP with dowel joints. Various strain sensors were evaluated in the laboratory and also in full-size concrete test slabs subjected to HVS loading. The developed FE models were validated and recommended for use. Fiber optic and electrical resistance strain gauge can be used to measure dynamic strains in concrete slabs. Fiber optic and vibrating wire strain gauge can be used to measure static and long-term strains in concrete slabs. It is recommended that a series of 5 to 7 uniformly spaced strain gauges be placed at and around the wheel path on the test slab in order to be able to capture the location of the applied load and the maximum strain caused by the applied load. The use of the critical stress-analysis and the computed maximum stress-to-strength ratio to assess the potential performance of concrete pavement slabs is recommended.
Improved Analysis Tool For Concrete Pavement
2017
541 pages
Report
Keine Angabe
Englisch
Construction Management & Techniques , Construction Materials, Components, & Equipment , Construction Equipment, Materials, & Supplies , Concrete pavement , 3-D finite-element model , Precast prestressed concrete pavement (PPCP) , Concrete containing RAP , Continuously reinforced concrete pavement (CRCP) , Fiber optic sensor , Strain gauge , Traffic loading conditions
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