Tests on plain and reinforced concrete beams . d per 1 io o-f (^cfal UK AV^/^y / /iP^C:^ yO(f/^ 3 34j^oo s it fi . ^^4 3 000 7 •• . ^7/ Z ^ ooG 34 3ao ^S00 3 . ^33 / I GOO Zo ^00 3 3^000-3£000 /f^^/PAz) . f 35 / S oao / f ooa /. /// / ^ Zoo /? 3oo s /. 3?^ 2 3 OXDO / 6> 00 3 35000 (F/. /toc^apo/J f. LCL ^4 002^900 ^ / 00 /4. ^ 00/ VJ oo ZZ ^00 3 3S000 f ^<^^y^r<fj ^ ^00 / p 000 failure took place. In regard to the different forms of iDarD much . has been saidof late in the Engineering News. The different forme of patentedlbars may have pai-^ticular advantages for especial purposes hut
Tests on plain and reinforced concrete beams . d per 1 io o-f (^cfal UK AV^/^y / /iP^C:^ yO(f/^ 3 34j^oo s it fi . ^^4 3 000 7 •• . ^7/ Z ^ ooG 34 3ao ^S00 3 . ^33 / I GOO Zo ^00 3 3^000-3£000 /f^^/PAz) . f 35 / S oao / f ooa /. /// / ^ Zoo /? 3oo s /. 3?^ 2 3 OXDO / 6> 00 3 35000 (F/. /toc^apo/J f. LCL ^4 002^900 ^ / 00 /4. ^ 00/ VJ oo ZZ ^00 3 3S000 f ^<^^y^r<fj ^ ^00 / p 000 failure took place. In regard to the different forms of iDarD much . has been saidof late in the Engineering News. The different forme of patentedlbars may have pai-^ticular advantages for especial purposes hut junder the conditions of the tests made they seemed to he nobetter than the plain rouiid or square rod. In fact the latter :appears to be the better since its form is more ecoaamical .Six beams were reinforced with plain bars no case dida bar slip in a beam. The adhesive bond of the concrete was alonesufficient to prevent slipping. This would point to the conclu- \ ;i sion that corrugations, deformations and spiral-twists used on. 36. patented iaari^ ire in)eleGG. Perhapc thir> is too stron{^ a st- in £ construction subject to impciCtB c.;nd vibrf;tions thesedevices may be an econoi:iicr;l form of a factor of safety againstruptur-e of boiid of tlie coiicrete -r-iid steel. Th - trussedsteel bar also does seem to be necessary. Five beams rein-forced Y^^ith it were tested laid all failed at the point of thereduction of metal due to the shearing up of the sides. This de-rvice for tlie i^urpose of preventing horizontal sherr seemed notto influence the beam except to weaken it,,for undoubtedly the beams would have ^zirfMrter} a lar^rer load had not the sides of theed bars been rhe;v;, uo at all. The tests with bars hor i zonrrtally tVaou<^ii the whole length of the beam demonstrated. that abeam, if made of a good quality concrete, will not fail byshear aij} hence it is but a needless waste of metal to reinforceagainst snear. It must b
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1904
