Influence Diagrams For The Determination Of Maximum Moments In Trusses And Beams (Paperback)

l914 - THE use of influence lines for the determination of nlaximutn moments and criterions for wheel loads is presented in many modern text books. The object of these few pages is to bring attention to the fact that for loads on all ordinary trusses, the influence diagrams for bending moments are drawn by follom-ing a single simple rule, and that the diagrams so constructed require no computations for their direct application. In addition to this the influence diagrams for loads on continuous trusses, cantilever trusses and arches are show11 to be based upon the one general diagram for sinlple trusses. While the diagrams, as a rule, are constructed for moments yet they can be as easily drawn for stresses or even areas of truss meinbers. The use of the influence diagrams in the determination of criterions for the positions of -11eleol ads vhichp roduce maximums is explained and shown to be very simple. - 1914 - TKCSSES PACF 1t111 f. o r 1 rnn. ing lllflucncc Di. lgr. i . . . s . . . . . . . . . . . . . . . . . . . . . . . 2 L i zo o f llI lxtt T IIS . . S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I I i o r i i i I . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 S utr Tilo ilit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 . c.. t i l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 of 1 r lt f Irws 8 -. l, 1111 ofr - lrr tl rrlls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 .. l, 11.111l c i . l l . sS i1111 lrI 1.1lhsc. S having I rr llcl Cllortls . . . . . . . . . . . 9 I ot t O I I I Clior l o r Cllrv IC l o. cSli l ililv lr . ss . . . . . . . . . . . . . . 12 1 01 C 111, l. rl o f ltr1.1.11 lror. tl Sinnl l l 1 l. llss . . . . . . . . . . . . . . . . . . . . . . . . 13 I tl o I I o r I I . . . . . . . . . . . . . . . . . 14 rlr 5 s s n i . t,5111 -tli ill d1 alrc. l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l J. cu. cr, S o. ll o o f lt iafn la i l l l Sl l-st F. 1l rt . . . . s . . . . . . . . . . . . . . . . . . . I j I-IIIN . S I - . . III o f I I I i l-cir il ill S11I-str111 1.11 . s. . . . . . . . . . . . . . . . . . 17 I I I - I I . . . . . . . . . . . . . . . . . . . . . . . 18 I I I i l i 1 0 1 1 I l - I I I . . . . . . . . . . . . . . 19 I, o . t t r r c . l t of T i gcin t i l l l Sul-lr i igcI r uss . . . . . . . . . . . . . . 20 1. c. l. t ic. . l of . l11 -h. rngcr Irubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1ioltr11llC hord of S111-btr11Tt russ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 rol liorcl IJI S111j-bnt it. 1 r11-s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 To11 tlortl o f S l-l u 11gr1 iq s . r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 1lott0111C l or of l S l-l it l gr r . s . . . . . . . . . . . . . . . . . . 25 r . I hc l. cngth of tllcb C111 St rir1gc. r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 D I o I f IS iIll rl lr Truss 11 lvillg Ccr tcr of lLn nc rltIsj rtn-een tl c I I I I I . . P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 . I, . i i . . I of i l l l l r I ruii II IV II C 111tvr o f A10111 1ltbs etx-een the Sul1port3 . 28 v TABTX OF COSTESTS CHAPTER 11 DOUBLE IN TERSECTIOT S R CSSES PACE Double Intersection Trr ssc . s . . . . . . . . . . . . . . . . . . . . . . . . ...