00469199

Component

http://onlinepubs.trb.org...trr/1987/1133/1133-005.pdf

https://scholar.google.co...+Ray&publication_year=1987

A simplified method for the analysis and design of independent anchor blocks is presented. Independent anchor blocks are structures designed to provide adequate guardrail-system anchorage and still remain independent of the bridge rail structure in guardrail-bridge rail transitions. Critical loadings for independent anchor blocks are discussed as well as the dynamic ultimate strength of soils. Equations of motion are developed from dynamic equilibrium considerations, and design curves are developed that can assist the designer in selecting the most appropriate geometry. Given the length and width of a particular independent anchor block, the design curves indicate what minimum embedment depth is required to minimize deflections in the critical-loading cases. Finally, the results of two full-scale crash tests are presented that verify the design curves.

Publication of this paper sponsored by Committee on Safety Appurtenances. 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

00610219

pp 30-41

1987

Transportation Research Record

0-309-04512-6

Print

Figures (15) ; Photos (27) ; References (6)

Anchorages; Anchoring; Bridge railings; Crash tests; Crashes; Critical values; Deflection; Depth; Design; Equations; Geometry; Guardrails; Length; Loads; Minimization; Motion; Testing; Ultimate strength; Width

Critical loads; Design curves; Embedment; Transition zones

Design; Highways; Research; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure

TRIS, TRB, ATRI

Jun 30 1988 12:00AM

• AN ANALYSIS OF THE RISK OF OCCUPANT INJURY IN SECOND COLLISIONS
• CRASH TEST EVALUATION OF THE VEHICLE-ATTENUATING TERMINAL (V-A-T)
• DEVELOPMENT OF AN ECONOMIC MODEL TO COMPARE MEDIAN BARRIER COSTS
• GUARDRAIL-BRIDGE RAIL TRANSITION EVALUATIONS
• STRUCTURAL OPTIMIZATION OF STRONG-POST W-BEAM GUARDRAIL
• W-BEAM APPROACH TREATMENT AT BRIDGE RAIL ENDS NEAR INTERSECTING ROADWAYS