Question Three The three-bar truss ABC shown in the figure part a has a span L = 3 m and is constructed of steel pipes having cross-sectional area A = 3900 mm² and modulus of elasticity E = 200 GPa. Identical loads P act both vertically and horizontally at joint C, as shown. (a) If P=475 kN, what is the horizontal displacement of joint B? (b) What is the maximum permissible load value Pmax if the displacement of joint B is limited to 1.5 mm? P P A 45° 45° B woobute L (a)

A bridge girder AB on a simple span of length L = 20 m supports a distributed load of maximum intensity q at midspan and minimum intensity q/2 at supports A and B that includes the weight of the girder (see figure). The girder is constructed of three plates welded to form the cross section shown. (a) Determine the maximum permissible load q based upon an allowable bending stress sigma = 140 MPa. Round to the nearest tenth.   qmax = ___ kN/m (b) Determine the maximum permissible load q based upon an allowable shear stress Tau = 60 MPa. Round to the nearest tenth. qmax = ___ kN/m

Determine the force in member IJ of the truss shown. Indicate (-) sign for compression. Express your answers in 1 decimal place. 4 kN A * 200 4 kN K 4 kN J B C 8 kN 4 kN H 6@4m 24 m 4 kN G DE 4 kN BERISHA N 222178 3.5 m F

Problem 1 (.:..D. For the given truss below, answer the questions. A = 1.5 in? and E = 29,000 ksi 2 k 2 k 2 k D E, F for all members: Sthe virtual loau nee 6 ft calcup B ma hertical disnenament of 8 ft 8 ft Amsng a unTZ OMULmer od Show the virtual load on the answer sheet to calculate the vertical displacement of joint E (Ag) using Castigliano's theorem (mark the magnitude of the load). (d) | Determine the vertical displacement of joint E (Ag) using Castigliano's theorem.

a) What is a truss? Explain shortly in your own words, and illustrate with one example. b) For the truss in the figure below, determine the zero-force members and give a short explanation to support your answer. B C D A H G F -1.5 m-1.5 m 1.5 m-1.5 m- 2 m 2 m E-

Given the truss and loading shown below, determine the stress at member AB if Pu = 18.375 Kips and its area is 23 in². Assume that the truss are simply supported at joint M and E. Express your answer in ksi. Use three decimal places. RM Pu Pu 0 Pu Pu 8@10' 80' Pu B Pu L K J I H G 8@10' 80' Pu D LL F E RE

Problem 7. [Concepts: Allowable stresses and factor of safety] Two aluminum rods AB and AC support a vertical load P. The allowable tensile stress for the aluminum is Gallow = 150 MPa. a) If P = 20 kN, determine the required diameters of the rods AB and AC. b) If the diameters of the rods AB and AC are 10 mm and 8 mm, respectively, determine the largest vertical force P that can be supported. U B

9. Determine the minimum axial forces in member CD of the truss given the following loading scenario: uniform dead load of 0.5 klf, a moving uniform live load of 1.5 klf, a moving concentrated load of 30 k, and an impact factor of 30%. A B с D E A K F G H I J ←16 ft →16 ft →→ 16 ft →◄ 16 ft →◄ 16 ft → 16 ft → L 1... Fuzi

A loaded pin-jointed truss is shown in the given figure. The force in member AC is (a) 10 √2 kN (Tensile) (c) zero 20 kN 10 kN C F A TITTT 3 m G D H 3 m K 3 m * ВУ ΟΤΙΣΣ (b) 10 √2 kN (Compressive) (d) 10 kN (Tensile) 3 m

A truss is loaded as shown in the figure. The cross- sectional area of each member is 500 mm^2. Hint: Use method of section in getting the axial forces. Use the guide cutting sections. L-6 m+6m- N 25 kN 8 m 50 kN - a 8 m 50 kN 8 m 50 kN 8 m B. 9. Find the axial stress in member HK O 35.34 MPa O 31.12 MPa O 33.34 MPa O 37.12 MPa Question 10 10. Find the axial stress in member HJ. O 125 MPa О 123 МPа O 127 MPa O 129 MPa