SHORT-TIME DEFLECTIONS OF BEAMS UNDER SINGLE AND REPEATED LOAD CYCLES

A SIMPLE AND EFFICIENT DESIGN PROCEDURE FOR PREDICTING THE ENTIRE SHORT-TIME LOAD DEFLECTION CURVE (OR A SINGLE POINT, SUCH AS AT MAXIMUM LOAD) UNDER REPEATED LOAD CYCLES INTO CRACKING RANGE IS PRESENTED. THIS INCLUDES THE LOADING, RECOVERY, AND RELOADING PARTS OF THE LOAD DEFLECTION CURVE. THE I-EFF (EFFECTIVE MOMENT OF INERTIA) CONCEPT" ADOPTED BY AC1 318071 FOR PREDICTING DEFLECTIONS OF REINFORCED BEAMS IS EXTENDED TO BOTH PRESTRESSED AND REINFORCED BEAMS UNDER REPEATED LOAD CYCLES (INCLUDING VARYING LOAD LEVELS) INTO THE CRACKING RANGE. THE RELIABILITY OF THE PROCEDUE IS INDICATED BY COMPARISONS BETWEEN COMPUTER RESULTS AND EXPERIMENTAL DATA OF THIS STUDY FOR 15 PRESTRESSED CONCRETE BEAMS (NINE NOMCOMPOSITE AND SIX COMPOSITE), AND WITH DATA IN THE LITERATURE FOR REINFORCED CONCRETE BEAMS. /AUTHOR/

• Supplemental Notes:
  • TITLE NO 69-11
• Authors:
  • Kripanarayanan, K M
  • Branson, D E
• Publication Date: 1972-2

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 110-17
• Serial:
  • Am Concrete Inst Journal & Proceedings
  • Volume: 69
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Beams; Composite construction; Deflection; Forecasting; Loads; Prestressed concrete; Prestressing; Reinforced concrete; Repeated loads
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209691
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 28 1972 12:00AM