This document provides an analysis of statically determinate trusses. It begins by defining trusses and discussing common types of truss analysis. The types of trusses discussed include roof trusses, bridge trusses, and classifications of coplanar trusses. Various truss configurations are shown in figures, such as Pratt trusses, Warren trusses, and Howe trusses. The document also discusses forces in truss members and classifications of trusses based on their degree of determinacy.
28. Department of Civil Engineering NPIC
3-32b¦. eKGacviPaK truss enaHedayviFItMNsMrab;bnÞúkTaMgBIrRbePTdUcxageRkam.
kMlaMgxageRkAenAelI truss samBaس dak;bnÞúkCak;EsþgenAelI truss samBaØ bnÞab;mkkMNt;kMlaMg S'i
enAkñúgGgát; i . enAkñúgrUbTI 3-32b/ kñúgkrNIEdleKkMNt;kMlaMgRbtikmμrYc eKGaccab;epþImkar viPaK
truss Rtg;tMN AD edIm,IkMNt;kMlaMgenAkñúgGgát; AB nig AF bnÞab;mkviPaKtMN F edIm,IkMNt;kMlaMg
enAkñúgGgát; FE nig FC bnÞab;mkeTotviPaKtMN D edIm,IkMNt;kMlaMgenAkñúgGgát; DE nig DC ¬Ggát;
TaMgBIrenHCaGgát;EdlmankMlaMgsUnü¦ ehIybnÞab;mkeTot viPaKtMN E edIm,IkMNt;kMlaMgrbs;Ggát;
EB nig EC ehIycugeRkay viPaKtMN B edIm,IkMNt;kMlaMgenAkñúgGgát; BC .
ykkMlaMgxageRkAecjBI truss samBaس BicarNa truss samBaØEdlminmankMlaMgxageRkA. dak;bnÞúk
mYyÉktþaenARtg;tMNTaMgBIrEdleyIg)anykGgát;ecj edaybnÞúkÉktþaenaHmanTisedApÞúyKña. Rbsin
ebIbnÞúkÉktþaenHbegáItkMlaMg Si enAkñúgGgát; truss TI i enaHedaysmamaRt kMlaMgEdlCaGBaØat x enA
kñúgGgát;EdlykecjnwgeFVIeGayGgát;TI i rgkMlaMg xsi .
BIrUbTI 3-32c/ bnÞúkÉktþanwgminbegáIteGaymankMlaMgRbtikmμenARtg;TMr A nigTMr C enAeBl
EdlGnuvtþsmIkarlMnwgeTAelI truss TaMgmUl. eKGackMNt;kMlaMg si edayviPaKtMNtamlMdab;lMeday
dUcelIkmun eBalKWcab;epþImBItMN A bnÞab;mktMN F / tMN D / tMN E nigcugeRkaytMN B .
eFVItMrYtpl (superposition)³ RbsinebIeKpÁÜbT§iBlrbs;bnÞúkTaMgBIrxagelI kMlaMgenAkñúgGgát;TI i rbs;
truss nwgkøayCa³
S i = S 'i + xsi (1)
sMrab;kMlaMgenAkñúgGgát;nimitþ EC enAkñúgrUbTI 3-32b KW S EC = S ' EC + xs EC . edaysar enAkñúg truss
Cak;EsþgminmanGgát;nimitþenH dUcenHeyIgRtUveRCIserIstMélrbs; x EbbNaEdlvanwgeFVIeGayGgát;
nimitþCaGgát;kMlaMgsUnü. dUcenH
S ' EC + xs EC = 0 (2)
b¤ x = −S ' EC / s EC . enAeBlEdlkMNt;tMélrbs; x rYcehIy enaHeKGackMNt;kMlaMgenAkñúgGgát;rbs;
truss saMjúaMBIsmIkar (1).
]TahrN_ 3-11³ kMNt;kMlaMgenAkñúgGgát;nImYy²rbs; truss saMjúaMEdlbgðajenAkñúgrUbTI 3-33a.
snμt;tMN B / F nig D sßitenAelIbnÞat;edk. bgðajnUvsßanPaBrgkMlaMgrbs;Ggát;nImYy².
dMeNaHRsay³
eFVIeGay truss køayCa truss samBaØmansßirPaB. edaykarGegát tMNnImYy²mankMlaMgEdlCa
GBaØatcMnYnbI . eKGacGnuvtþviFItMNedayédRbsinebIeKykGgát; CF yk ehIyCMnYsGgát; DB vij
karviPaK truss kMNt;edaysþaTic T.Chhay -89