00207145

Component

https://onlinepubs.trb.or...hrbproceedings/7/7-019.pdf

FACTS ESTABLISHED BY THE USE OF STRAIN GAGES TO MEASURE STATIC OR SLOWLY ROLLING LOADS ON CONCRETE SLABS ARE REPORTED AND COMPARED WITH RESULTS OF DYNAMIC TESTS TO INVESTIGATE RELATIONSHIPS BETWEEN STATIC AND IMPACT LOADING. CONCLUSIONS REACHED BY THE BPR AS A RESULT OF COMBINED TESTS OF CONCRETE BEAMS ARE THAT (1) CONCRETE IS CAPABLE OF GREATER ELASTIC DEFORMATION UNDER IMPACT THAN UNDER ORDINARY STATIC LOADS; (2) FATIGUE OF CONCRETE UNDER REPEATED IMPACT EXISTS; (3) REPEATED IMPACTS STRESSING THE CONCRETE TO ABOUT 55% OF ITS STATIC MODULUS OF RUPTURE EVENTUALLY CAUSE FAILURE; AND (4) BELOW THIS FATIGUE LIMIT EQUIVALENT LOADS, WITHOUT REGARD TO THEIR METHOD OF APPLICATION PRODUCE THE SAME STRESS, WHILE BEYOND THIS LIMIT THE DIFFERENCE IN BEHAVIOR IS DUE TO THE DURATION OF THE LOAD APPLICATION.

Vol 7, Part I, PP 172-175, 5 REF; part of Report of Committee on Structural Design of Roads. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01490405

1928

Highway Research Board Proceedings

Digital/other

Accelerated tests; Concrete; Concrete pavements; Crash tests; Dynamic loads; Fatigue (Mechanics); Fatigue limit; Repeated loads; Static loads

Highways; Pavements; Research

TRIS, TRB

Aug 8 1971 12:00AM

• A METHOD OF MEASURING RELATIVE EFFICIENCY OF TRAFFIC FLOW THROUGH STREET INTERSECTIONS
• A RESUME OF RESULTS FROM STUDIES MADE ON BRICK PAVEMENTS
• A SURVEY OF ACCIDENTS INVOLVING TRUCKS AT HARTFORD, CONNECTICUT, JANUARY 1- JULY 1, 1927
• BERM MAINTENANCE
• BITUMINOUS PAVEMENTS
• BRIDGE MAINTENANCE
• CAUSES AND CURE OF FROST BOILS
• COARSE AGGREGATES
• COLOR AND FORM OF TRAFFIC SIGNALS AND SIGNS IN RELATION TO SAFETY
• CURING CONCRETE PAVEMENTS
• DESIGN OF CONCRETE MIXTURES
• DISCUSSION, REPORT OF COMMITTEE ON HIGHWAY TRAFFIC ANALYSIS
• DISCUSSION, REPORT OF COMMITTEE ON MAINTENANCE
• FATIGUE OF CONCRETE
• FINE AGGREGATES
• HIGHWAY ACCIDENT STATISTICS
• INDUSTRIAL RESEARCH - A RETROSPECT AND A PROSPECT OF SCIENTIFIC INVESTIGATION IN INDUSTRY
• INFLUENCE OF STEEL REINFORCEMENT ON CONCRETE PAVEMENTS
• INTRODUCTION OF PLANES OF WEAKNESS IN CONCRETE SLABS TO CONTROL CRACKING
• LANDSLIDES
• MAINTENANCE OF GRAVEL AND STONE ROADS, ESPECIALLY SURFACE TREATMENTS
• NEW TRAFFIC FLOW RECORDER IN USE ON CLEVELAND TRAFFIC SURVEY
• PORTLAND CEMENT
• PRESENT STATUS OF LEGAL REGULATION OF AUTOMOBILE HEADLIGHTS, TAIL LIGHTS AND MOTOR VEHICLE BRAKES IN THE UNITED STATES
• REPORT OF COMMITTEE ON HIGHWAY TRAFFIC ANALYSIS
• REPORT OF DIRECTOR
• REPORT OF SUBCOMMITTEE ON MOTOR TRUCK IMPACT STUDIES, BUREAU OF PUBLIC ROADS INVESTIGATION
• REPORT OF SUBCOMMITTEE ON SUBGRADE STUDIES
• REPORT ON CULVERT INVESTIGATION
• RESEARCH IN PORTLAND CEMENT CONCRETE PAVEMENTS
• SEMI-GRAVEL, TOP-SOIL, AND SAND-CLAY ROAD MATERIALS
• SNOW REMOVAL AND SNOW REMOVAL EQUIPMENT
• TESTS ON FINISHED CONCRETE
• THE DEMONSTRATION AND DRAMATIZATION OF RESEARCH
• THE RAILROAD GRADE-CROSSING HAZARD ON RURAL HIGHWAYS
• THEORY OF CONCRETE PAVEMENT DESIGN
• TOP DRESSING OR DRY MAINTENANCE ROADS