Report on dynamic tests of a 55 ft. [Amdek bridge] member for Concrete Products of America Division, American-Marietta Company, Pottstown, Pennsylvania
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19 show 55 foot beam AMDEK Ames Dial Appendix applied approximately average crack width beam is shown Beam Showing Dials beam tested behavior bending stiffness center-to-center Concrete Products Crack Measurement cracking characteristics cumulative cycles Cycles of Load cycles per minute D+L+I deg F design dynamic load dowel drilled hole dynamic deflections dynamic test effective loads equivalent static design Equivalent Static Load Figure Fina1 four strands Fritz Engineering Laboratory FT BEAM higher loads hydraulic jacks jack load kip ft Kip-feet Fig kips per jack Lehigh University length Load Plus Impact Load Point Loading Sequence loads were calculated manufactured maximum crack width Maximum Deflections Method of Crack Midspan in Kip-feet number of cracks prestress was measured Products of America release of prestress repetitive loading rods Section shown in Fig slip of strands span static design load surface tendons Test Program tical Total Beam Shortening Total Shortening U1timate ultimate load