TESTS OF REINFORCED CONCRETE HINGES OF THE MESNAGER TYPE

SIXTY-TWO REINFORCED CONCRETE HINGES OF THE MESNAGER TYPE WERE TESTED AS THE BEGINNING OF AN INVESTIGATION AT THE UNIVERSITY OF MARYLAND UPON THE PRINCIPAL HINGE TYPES USED AT PRESENT IN RIGID FRAME CONSTRUCTION. BAR SIZES OF 1/4, 3/8, AND 1/2 IN. WERE USED WITH VARIOUS COMBINATIONS OF ROTATION, THRUST, AND SHEAR. THE BARS, WITH 1/R VALUES OF APPROXIMATELY 40, 65, AND 90, WERE CROSSED AT 15, 30, AND 45 DEG. WITH THE CENTER-LINE OF THE HINGE. IT WAS FOUND THAT (1) PROPER PLACING AND WIRING OF THE TRANSVERSE STEEL WAS ESSENTIAL, (2) THE ULTIMATE LOAD WAS PRACTICALLY A LINEAR FUNCTION OF THE NUMBER OF BARS, (3) ROTATION OF THE TOP BLOCK AFFECTED THE ULTIMATE THRUST ONLY SLIGHTLY FOR ROTATIONS ENCOUNTERED IN PRACTICE, (4) INCREASES IN LOAD CAPACITY COULD BE OBTAINED BY THE USE OF HIGH YIELD POINT STEELS, (5) THE ULTIMATE LOAD WAS REDUCED WITH INCREASES IN THE 1/R RATIO OF THE BARS, (6) COMPUTED STRESSES INDICATED A SATISFACTORY AGREEMENT BETWEEN TESTS AND THE EQUATIONS PRESENTED BY PARSONS AND STANG IN PROCEEDINGS, A.C.I. VOL. 31, P. 304, (7) COMBINATIONS OF THRUST, SHEAR, AND ROTATION WERE NOT PARTICULARLY SEVERE UNLESS THE ROTATION WAS CLOCKWISE WITH SHEAR TO THE RIGHT (OR COUNTER-CLOCKWISE WITH SHEAR TO THE LEFT.) /AUTHOR/

• Record URL:
  • https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/17/17Pt1-011.pdf
• Supplemental Notes:
  • Vol 17, ParT I, PP187-201, 16 FIG, 2 TAB, 6 REF. 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.
• Authors:
  • Ernst, G C
• Publication Date: 1938

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Seventeenth Annual Meeting of the Highway Research Board Held at Washington, D.C. November 30, December 1, 2, 3, 1937. Part I
• Serial:
  • Highway Research Board Proceedings
  • Volume: 17
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bars (Building materials); Breaking loads; Construction; Equations; Frames; Hinges; Reinforced concrete; Rotation; Shear strength; Steel; Stiffness; Testing; Thrust
• Old TRIS Terms: Rigid frames
• Subject Areas: Bridges and other structures; Construction; Highways; Materials;

Filing Info

• Accession Number: 00209271
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 15 1971 12:00AM