Where is/are the location(s) of the maximum compressive flexural stress? A simple I-beam is loaded as shown. 20 mm PKN PKN PKN C с L/4 m L/4 m 1/4 m L/4 m DE 20 mm 20 mm- 250 mm 150 mm 150 mm D A
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- Where is/are the location(s) of the maximum transverese shear stress? A simple I-beam is loaded as shown. 20 mm P KN PKN PKN Į Į -C B с D L/4 m L/4 m Midspan at point C Roller at E at the NA Section B at the top fiber Pin A at point C Midspan at point D Roller E at point D L/4 m L/4 m OE 20 mm 20 mm- 250 mm 150 mm 150 mm ASelect all zero-force members in the truss shown below. Check the box for zero- force members 3 m 3 m 12 m, 8 @ 1.5 m DE O LK ЕР O HF O BC BM EF OM CD BN LO O DK FI O coAn 8 mm diameter pin is used at A, and 12 mm diameter pins are used at B and D. Knowing that the ultimate shearing stress is 100 MPa at all connections and that the ultimate normal stress is 250 MPa in each of the two links joining B and D, determine the allowable load P. Top view 200 mm +180 mm 12 mm 8 mm B B A B 20 mm +8 mm 8 mm OD 12 mm -- - Front view Side view
- Question No3 Refer to Fig-III Design Shear reinforcement for the beam shown in figure. fyt =300Mpa. Main steel is 5#6 bars and h is 600 mm & b=300. fc' is 21 Mpa. 30KNim 2KN TKNm 1.25m- 4.25m– -2m- -2m- FIG-IIIA For the truss shown, find veyticat deflection bylunit lead Methed. EA 15 _atfd) Ioku for all members increase in temp is (50€) in (ad) short in (ad)is (3 EmfrI the Design the reinforcements of the given T beam below. bf=900mm bw=420mm tf=120mm d=550mm d'=80mm fc'=34MPA fy=415MPA USE NSCP 2015 mm2 A.Mu = 1400KN-m, As = mm2 B.Mu = 1700kN-m, As = mm2, As' = CS Scanned with CamScanner
- 1. For the Pratt bridge truss and the loading shown below, determine the average normal stress in member BE, knowing that the cross-sectional area of that member is 60 in². NN K 12-12--12--12--| 50 lips 50 kips 50. ips Figure 1 G xfoneACTIVITY The figure shows a roof truss and the detail of the connection at joint B. Members BC and BE are angle sections with thickness shown in the figure. The working stresses are 70MPa for shear in rivet and 140MPa for bearing stress due to the rivets. How many 19-mm diameter rivets are required to fasten the said members to the gusset plate? K.R.R.P. wwwwwwww 00 400 4m B 3m C 96KN 4m 6m 200KN E Am 3m F 96KN 4m H DETAIL OF JOINT B 75X75X6 mm ------------- · ET---- I 14 mm thick GUSSET PLATE P BC 75X75X13 mm P BERigid bar ABC is supported by member (1) at B and by a pin connection at C. Member (1) has a cross sectional area of 1.25 in.² and a yield strength of 33 ksi. The pins at B, C, and D each have a diameter of 0.5 in. and an ultimate shear strength of 78 ksi. Each pin connection is a double-shear connection. Specifications call for a minimum factor of safety in member (1) of 1.3 with respect to its yield strength. The minimum factor of safety required for pins B, C, and D is 3.1 with respect to the pin ultimate shear strength. Determine the allowable load P that may be applied to the rigid bar at A. Use overall dimensions of a = 64 in. and b = 131 in. (1) b kips P Answer: Pallow= i a B
- Rigid bar ABC is supported by member (1) at B and by a pin connection at C. Member (1) has a cross sectional area of 1.35 in.² and a yield strength of 42 ksi. The pins at B, C, and D each have a diameter of 0.7 in. and an ultimate shear strength of 76 ksi. Each pin connection is a double-shear connection. Specifications call for a minimum factor of safety in member (1) of 1.9 with respect to its yield strength. The minimum factor of safety required for pins B, C, and Dis 2.7 with respect to the pin ultimate shear strength. Determine the allowable load P that may be applied to the rigid bar at A. Use overall dimensions of a = 50 in. and b = 102 in. (1) Answer: Pallow i a B kipsRigid bar ABC is supported by member (1) at B and by a pin connection at C. Member (1) has a cross sectional area of 1.40 in.2 and a yield strength of 43 ksi. The pins at B, C, and D each have a diameter of 0.4 in. and an ultimate shear strength of 70 ksi. Each pin connection is a double-shear connection. Specifications call for a minimum factor of safety in member (1) of 1.8 with respect to its yield strength. The minimum factor of safety required for pins B, C, and D is 2.9 with respect to the pin ultimate shear strength. Determine the allowable load P that may be applied to the rigid bar at A. Use overall dimensions of a = 63 in. and b = 129 in.A steel pipe (1) is attached to an aluminum pipe (2) at flange B. The pipes are attached to rigid supports at A and C, respectively 18 m 14 m Member (a) has a cross-sectional area A,-3,600 mm2, an elastic modul as a cross-sectional area A 3,600 mm2, an elastic modulus E-200 GPa, and an allowable has a cross-sectional area A2 2,o00 mm2, an elastie modulus E-70 GPa, and an allowable normal stress of 120 MPa. Determine the maximum load Pthat can be applied to fange B without exceeding either allowable stress