Question

2) Determine the LRFD design tensile strength for the member and the bearing-type connection. The plates are A36 with Fu=58 ksi, and bolts are A490 7/8 in, threads not excluded from shear planes. Ooo | در انرا ا درا ا در 2 in 3 in PL x 12. 3 in 12 in PL 1 X 12 P/2 € P/2 + PLŐ x 12

Answer 1

Given that:

The LRFD design tensile strength for the member and the bearing type correction.

Fu = 58 ksi

Answer The bearing design tonsile strength for the member and the CRED type OOO * ooolta 20 3 37 97 Pux16 P. X/6 compute moss section yielding of plates wing the formula given below Psify Ag....-(1) Here, sy - yield strength of stool plate Ag - gross azca t-the stæer obtain the dimensions of plate from the fiąure substitute 36 ks for fy and (1x16 ) ind for Ag. Pn - 36(16) P376 ASD Compute (RFD obesign staength oth 0:0.9, and Getrocable stength with R, :1064 for the gross yield Strength of phate on follows: Pn - (0.9)(576

Po 515,4% Po 2 576 1167 2344.96 aing the compacte effective and the member given below! - Ac Van... (2) Here, An as the net area of the plate o in the reduction co-Acant Obtain reduction Acanthom tablo 137 A 1, Dence an element the tension member are connected uring , substitute for u. calculate the net area of the plate equation falow; Take diameter of the bolts on the in. Hence, the diameter of the bolt hoce en diameter of the boit plate le in. 1 . An= 16-3 ( 7 / 1 ) ) . :10-31*)0) 316-3 AR= 13 in 2 Substitute for and 13n for de an equation - Effective arca showd be less than of times grou area of the plater, according to Ascarcefiardin 10-16

Pn - Fudc and At Here, fu In the tonsile strength of steel plate the effectieve acea of the plate substitute sekso for fu and sin for At =) = (58.013) compute (RFD tesion strength with 0: 0-45 ond As allowable strength with St = 9.00 . fo the tenilce geput &tion strength of plate : Delo - (0.45) (154) :565.3k . 454 -3976 calculate the booking strength of boits by wing the relation fallout:- R = 1.9 Litra No.4 L 39-441NOA boll... (3) calaiate the clea? petanco L as fauolo : Les cons of 12->) a 13-1) 11.50 sabstitute for ti 15 in for L, sski 9% in for a n equation 3 Rp(.8) 1.5) (698)09) 939.64 163.4270)(38) (9) for Fu and

Rp 939.66 4. 1096.at 046 4:04 for the braing ond, AD stwrigth compete CRD atsegn strength alloccable istaength with 222.00 of both a follow : ben -20.45) (939.6) 104.46 hen. 19396) 2.00 = 469.8k of bolts by caring the calculate the shearing strength botatbon af faltowy: Rn Fodb (no. of bolts) threads not for A329 both cofth Substitute (8 ks. SEXE Excluded from shear plane, ond 0.60 802 for Ab Rp : (as) C0.60) 9 59.59.26 compute (RFD clesian strength epidh 0.075, and AD allow able strength with 25.00 for the sharing Strength of bolts .: ØRp = 60.49) 1959-9) .. . 5190.4le 959.2 2.00 129.6%

:. The (RFD design stoergth En 194.44) Asp allowobie strength in 1125.68]