Accession Number : AD0848106

Title :   Shear Behavior of Deep Reinforced Concrete Beams. Volume III. Dynamic Tests.

Descriptive Note : Technical rept. Jun 63-Oct 66,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY

Personal Author(s) : Crist, Robert A.

Report Date : 19 DEC 1968

Pagination or Media Count : 287

Abstract : Large-scale dynamic tests were performed on deep reinforced concrete beams. Nominal concrete strengths for all tests varied between 2,000 and 3,500 psi; intermediate-grade ASTM A 15 reinforcing steel was used. All beams were simply supported. Tests were performed on nine beams of three span-depth ratios (1.66, 2.67, and 3.62), subjected to a uniformly distributed dynamic transient load. The beams contained longitudinal tensile reinforcing with or without web reinforcing. Both horizontal and vertical web reinforcement were used. Behavior was observed as the span-depth ratio and web reinforcement were varied. Numerous modes of failure in shear were observed as beam configuration was varied. Modes of failure transitioned from shear to flexure as the span-depth ratio increased and the amount and orientation of web reinforcement were varied. Data were correlated with mathematical models derived in this study and with models developed in static tests. The mathematical models were used to investigate shear behavior for deep beams. Equations were developed which predicted the median shear behavior of deep beams with web reinforcement. Dynamic response prediction models were developed which predicted the measured response of the dynamic test beams. Recommendations are made for further research in the development of improved design criteria for Air Force defense systems. (Author)

Descriptors :   (*UNDERGROUND STRUCTURES, NUCLEAR EXPLOSIONS), (*BEAMS(STRUCTURAL), STRUCTURAL PROPERTIES), (*REINFORCED CONCRETE, LOADS(FORCES)), RESPONSE, SHEAR STRESSES, LOADS(FORCES), DEFLECTION, STRAIN(MECHANICS), FLEXURAL STRENGTH, TENSILE PROPERTIES, LOAD DISTRIBUTION, CRACKS, CRACK PROPAGATION, FAILURE(MECHANICS), DETONATION WAVES.

Subject Categories : Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE