Question

Two mild steel tie bars for a bridge structure are to be joined by thickness of the tie bar is 20 mm and carries a tensile load of 400 kN. Design the joint if the allowable stresses are : o, = 90 MPa ; t = 75 MPa and o = 150 MPa. a double cover butt joint. The 14. Assume the strength of rivet in double shear to be 1.75 times that of in single shear 150 mm ; d= 27 mm ; n = 6 ; n = 90% [Ans. b

Answer 1

dig 0f uet fxom unwin's formula (e) e fficiency of jeiut da6Jt $7 = bto b-d b 250-47 (6) Using dicmond g1oup of rioeting flat is weabened by oue uet hol e treigth of blate at bue uct sectio n=00892 n90%0 400 x 10(b-27) x20 x 90 be 244-22 bn 250 M no.0f iocts requircel Pe Least Pon Ps I Pe dte 272oXI50 81,070 N 4 2 A 45147.878 N PC7 Ps 400 x 103 n =Pe 75147.878