Questions and Answers of Fundamentals Of Structural Analysis

The cross sections of the columns and girder of the frame in Figure P13.9 are identical. Carry out an approximate analysis of the frame by estimating the location of the points of inflection in the
Carry out an approximate analysis of the truss in Figure \(\mathrm{P} 13.10\) by treating it as a continuous beam of constant cross section. As part of the analysis, evaluate the forces in members
Use an approximate analysis of the continuous truss in Figure P13.11 to determine the reactions at \(A\) and \(B\). Also evaluate the forces in bars \(a,b, c\), and \(d\). Given: \(P=9 \mathrm{kN}\).
Estimate the deflection at midspan of the truss in Figure P13.12, treating it as a beam of constant cross section. The area of both the top and bottom chords is \(10 \mathrm{in} .{ }^{2} . E=29,000
Determine the approximate values of force in each member of the truss in Figure P13.13.Assume that the diagonals can carry either tension or compression force. 20 kips 15' A 20' C B 20 kips
Determine the approximate values of bar force in the members of the truss in Figure P13.14 for the following two cases:(a) Diagonal bars are slender and can carry only tension.(b) Diagonal bars do
(a) All beams of the frame in Figure P13.15 have the same cross section and carry a uniformly distributed gravity load of \(3.6 \mathrm{kips} / \mathrm{ft}\). Estimate the approximate value of axial
Using an approximate analysis of the Vierendeel truss in Figure P13.16, determine the moments and axial forces acting on free bodies of members \(A B, B C, I B\), and \(H C\). 40 kips B 40 kips H C 4
Determine the moments and axial forces in members of the frame in Figure 13.17, using the portal method. Compare the results with those produced by the cantilever method. 30 kips C B H 25'- D E F 12'
Computer Study—comparison of cantilever and portal methods with an exact analysis. (a) Determine the moments, shear, and axial forces in the members of the frame in Figure P13.18, using the portal
Computer Study—comparison of cantilever and portalmethods with an exactanalysis. (a) Analyze the two-story frame in Figure P13.19 by the portal method. (b) Repeat the analysis using the cantilever
Computer Study-comparison of approximate analysis with an exact analysis. (a) Use approximate analysis to compute the reactions and draw the moment diagrams for column \(A B\) and girder \(B C\) of
Computer Study—comparison of approximate analysis with exact analysis. Consider the structures in Figures P13.21, respectively. (a) Use approximate analysis to compute the reactions and draw moment
The structure in Figure P14.1 is composed of three pin-connected bars. The bar areas are shown in the figure. Given: \(E=30,000 \mathrm{kips} / \mathrm{in}^{2}\).(a) Compute the stiffness coefficient
The cantilever beam in Figure P14.2 is supported on a spring at joint \(B\). The spring stiffness is 10 kips/in. Given: \(E=30,000\) kips/in. \({ }^{2}\)(a) Compute the stiffness coefficient
The pin-connected bar system in Figure P14.3 is stretched \(1 \mathrm{in.}\) horizontally and connected to the pin support 4. Determine the horizontal and vertical components of force that the
Analyze the beam in Figure P14.4.After member end moments are determined, compute all reactions and draw the moment diagrams. \(E I\) is constant. A w = 12 kN/m 8 m- B 18 kN -3 m- 6 m C
Analyze the steel rigid frame in Figure P14.5.After member end moments are evaluated, compute all reactions and the moment diagram for beam \(B C\). w = 1 kip/ft I A 15' 30 kips 41 30' C 12'
Analyze the beam in Figure P14.6.Compute all reactions and draw the shear and moment diagrams. Given: \(E I\) is constant. w = 6 kips/ft 18' B 30 kips 24'- 12'-
Analyze the reinforced concrete frame in Figure P14.7.Determine all reactions. \(E\) is constant. 20 kN C -3 m w = 6 kN/m 21 12 m D T 4 m -1
The structure in Figure P14.8 is composed of a beam supported by two struts at the cantilever end. Compute all reactions and the strut member forces. Use \(E=30,000\) kips/in. \({ }^{2}\). 10'- I=
The cantilever beam in Figure P14.9 is connected to a bar at joint 2 by a pin. Compute all reactions. Given: \(E=30,000 \mathrm{kips} / \mathrm{in}\). \(^{2}\). Ignore axial deformation of the beam.
Analyze the rigid frames in Figure P14.10, using symmetry to simplify, P14.10 the analysis. Compute all reactions and draw the moment diagrams for all members. Also \(E\) is constant. B 1 120 KN 21
Analyze the rigid frames in Figure P14.11, using symmetry to simplify, P14.11 the analysis. Compute all reactions and draw the moment diagrams for all members. Also \(E\) is constant. 8 kips B -10 I
Using the stiffness method, write and solve the equations of equilibrium required to determine the horizontal and vertical components of deflection at joint 1 in Figure P15.1.For all bars \(E=200
Using the stiffness method, determine the horizontal and vertical components of displacement of joint 1 in Figure P15.2.Also compute all bar forces. For all bars, \(L\) \(=20 \mathrm{ft}, E=30,000
Form the structure stiffness matrix for the truss in Figure P15.3.Partition the matrix as indicated by Equation 15.30. Compute all joint displacements and reactions using Equations 15.34 and 15.35.
Form the structure stiffness matrix for the truss in Figure P15.4.Use the partitioned matrix to compute the displacement of all joints and reactions. Also compute the bar forces. Area of bars 1 and
Determine all joint displacements, reactions, and bar forces for the truss in Figure P15.5.AE is constant for all bars. \(A=2\) in. \({ }^{2}, E=30,000\) kips/in. \({ }^{2}\). 40 kips S 6 2 4 16' 3
Determine all joint displacements, reactions, and bar forces for the truss in Figure P15.6.For all bars, \(A=1500 \mathrm{~mm}^{2}\) and \(E=200 \mathrm{GPa}\). 3 m 3 m L 4m 0 80 KN 3 5m
Using the stiffness method, analyze the two-span continuous beam shown in Figure P16.1 and draw the shear and moment curves EI is constant. IA 20 w = 2 kips/ft B 30'
Write the stiffness matrix corresponding to the degrees of freedom 1,2, and 3 of the continuous beam shown in Figure P16.2. A SEI Ks= 12- 1 B 2 spring 3 -I+2 L D El= constant
In Problem P16.2, find the force in the spring located at B if beam ABCD supports a downward uniform load w along its entire length.Problem P16.2Write the stiffness matrix corresponding to the
Using the stiffness method, analyze the frame in Figure P16.4 and draw the shear and moment curves for the members. Neglect axial deformations. EI is constant. 10 kips B 20 kips 66 D T 6' 8'
Analyze the frame in Figure P16.5 and draw the shear and moment curves for the members. Neglect axial deformation. EI is constant. A 80 kips -6- 12'- B -6'- 8'
Using the stiffness method, analyze the frame in Figure P16.6 and draw the shear and moment curves for the members. Neglect axial deformations. EI is constant. 12' B A 10k 10000 16' C T 8' 8' Sk
For the frame shown in Figure P16.7, write the stiffness matrix in terms of the three degrees of freedom indicated. Use both the method of introducing unit displacements and the member stiffness
Solve Problem P16.7 using the direct summation of global element stiffness matrices.Problem P16.7For the frame shown in Figure P16.7, write the stiffness matrix in terms of the three degrees of
Write the equations for shear and moment between points \(B\) and \(C\) as a function of distance \(x\) along the longitudinal axis of the beam in Figure P5.1 for (a) origin of \(x\) at point \(A\)
Write the equations for shear and moment between points \(D\) and \(E\). Select the origin at \(D\). 6' B D | 5 3 8 kips w = 3 kips/ft x 10'- E
Write the equations for shear and moment between points \(A\) and \(B\). Select the origin at \(A\). Plot the graph of each force under a sketch of the beam. The rocker at \(A\) is equivalent to a
Write the equations for shear \(V\) and moment \(M\) between points \(B\) and \(C\). Take the origin at point \(A\). Evaluate \(V\) and \(M\) at point \(C\) using the equations. A 4' w = 5 kips/ft BA
Write the equations for moment between points \(B\) and \(C\) as a function of distance \(x\) along the longitudinal axis of the beam in Figure P5.5 for ( \(a\) ) origin of \(x\) at \(A\) and (b)
Write the equations required to express the moment along the entire length of beam in Figure P5.6. Use an origin at point \(A\), and then repeat computations using an origin at point \(D\). Verify
Write the equations for shear and moment using the origins shown in the figure. Evaluate the shear and moment at \(C\), using the equations based on the origin at point \(D\). 10 kips w = 5 kips/ft
Write the equations for shear \(V\) and moment \(M\) in terms of distance \(x\) along the length of the beam in Figure P5.8. Take the origin at point \(A\). 8 kips w = 4 kips/ft 10'- 15 kips B + 6'.
Write the equation for moment between points \(B\) and \(C\) for the rigid frame in Figure P5.9. 6 kips B 48 kips w = 6 kips/ft 16- C DA 48 kips 10' 6 kips
Write the equations for moment as a function of distance along the longitudinal axes for members \(A B\) and \(B C\) of the frame in Figure P5.10. Origins for each member are shown. 6' + 6' I w = 4
Write the equations for shear and moment between points \(B\) and \(C\) for the rigid frame in Figure P5.11. Select the origin at point \(C\). 4 kN w = 4 kN/m B 6 m L 9 m-
Consider the beam shown in Figure P5.12.(a) Write the equations for shear and moment using an origin at end A. (b) Using the equations, evaluate the moment at section 1. (c) Locate the point of zero
Given the moment curve for each beam, (a) sketch the deflected shape and (b) determine the applied loading qualitatively. A moment B C
Given the moment curve for each beam, (a) sketch the deflected shape and (b) determine the applied loading qualitatively. moment A B D
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. 40 kips B 64 w = 4 kips/ft 10' EC D
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. A 200 kip. ft 170 kip. ft 100 kip. ft B DE
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. A 10'- P = 20 kips B hinge +5 w = 12
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. A -25- B 3 kips 12 kips 195 kip. ft D E
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. w = 2 kips/ft B |A 13'- W = 5 kips/ft B 13'-
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. 3 A B P = 12 kips Lat 4- = 2 kips/ft rocker
For each beam, draw the shear and moment curves label the maximum values of shear and moment, locate points of inflection, and sketch the deflected shape. 20'- P = 12 kips hinge. B w = 5 kips/ft C
Draw the shear and moment curves for the beam in Figure P5.22, and sketch the deflected shape. Find the vertical displacement of joint \(D\). 15 kips/ft 5 hinge/B 10'- 150 kip. ft 30 kips spring, k =
Draw the shear and moment curves for each member of the frame in Figure P5.23. Sketch the deflected shape. 6 kips 3' 12' B A 6' C E 3 kips/ft 18'
Draw the shear and moment curves for each member of the frame in Figure P5.24. Sketch the deflected shape. 6 m 10 kN B 3 m-3m-4- -6m- w = 2 kN/m D -6m- E
Draw the shear and moment curves for each member of the frame in Figure P5.25. Sketch the deflected shape hinges at \(B\) and \(C\). 4 m A 30 kN.m 3m- 3 m B w = 5 kN/m 6 m D
Draw the shear and moment curves for the beam in Figure P5.26. Sketch the deflected shape. W = 3 kips/ft 30 kip.ft W = 6 kips/ft 9'- -B 9' W3 = 2 kips/ft C
Draw the shear and moment curves for each member of the frame in Figure P5.27. Sketch the deflected shape. 4 kips B 10 kips 8'- w = 2 kips/ft C A 8'. D 15'
Draw the shear and moment curves for each member of the frame in Figure P5.28. Sketch the deflected shape. 2 kN/m -5m- B C 3 m 20 kN 5 m 10 kN/m D 5m
Draw the shear and moment curves for each member of the frame in Figure P5.29. Sketch the deflected shape. T 3' 5' B w = 2 kips/ft 4
Draw the shear and moment curves for each member of the beam in Figure P5.30. Sketch the deflected shape. The shear connection at \(B\) acts as a hinge. |A w = 12 kips/ft 6'- B hinge 6 kips/ft C 6
Draw the shear and moment curves for each member of the beam in Figure P5.31. Sketch the deflected shape. A -5 kN/m 10 m B 5 kN/m -10 m 40 KN C D 4-5m- 10 m E
Draw the shear and moment curves for the beam in Figure P5.32. Sketch the deflected shape. w = 9 kN/m 6 m- w = 9 kN/m B + -6 m- C
Draw the shear and moment curves for the indeterminate beam in Figure P5.33. Reactions at support \(A\) are given. Sketch the deflected shape. 4.5 kip.ft 1.69 kips A 8'- w = 4 kips/ft -B - 15.19 kips
Draw the shear and moment curves for the beam in Figure P5.34. Sketch the deflected shape. E 4' P = 36 kips 3' T 2' F P= 24 kips w = 12 kips/ft B C | 3' 3 3'- 6'-
Draw the shear and moment curves for the beam in Figure P5.35. Reaction at support \(B\) is given. Locate all points of zero shear and moment. Sketch the deflected shape. P = 30 kips 16+6+6- B RB =
Draw the shear and moment curves for each indeterminate beam. Reactions are given. Label maximum values of shear and moment. Locate all inflection points, and sketch the deflected shape. 43.5 kN.m C
Draw the shear and moment curves for each indeterminate beam. Reactions are given. Label maximum values of shear and moment. Locate all inflection points, and sketch the deflected shape. 13.93 kip.ft
Draw the shear and moment curves and sketch the deflected shape. R = 9 KN 30 kN 6m 3 m B RB = 105 KN 30 kN 9 m 3m w = 8 kN/m RC = 105 KN 6 m RD = 9 kN
Draw the shear and moment curves and sketch the deflected shape. A 10% B C P = 10 kips w = 2 kips/ft D E F -8-4--4--4-105 G
(a) Draw the shear and moment curves for the frame in Figure P5.40. Sketch the deflected shape. (b) Write the equations for shear and moment in column AB. Take the origin at A. (c) Write the shear
Draw the shear and moment curves for each member of the rigid frame in Figure P5.41. Sketch the deflected shape. D w = 1 kip/ft B C Lo 6'- 20 w = 1 kip/ft F G tot E 12' 12' 4
Draw the shear and moment curves for each member of the frame in Figure P5.42. Sketch the deflected shape. Joints B and D are rigid. 35 kips. 3' 6' B 4 kips/ft -10' 31 D hinge. 8 T E 6'
Draw the moment curves for each member of the frame in Figure P5.43. Sketch the deflected shape of the frame. Joints \(B\) and \(C\) are rigid. w = 2 kips/ft C B 24 kips 8'- E | 88 D 12' 12'
Draw the shear and moment curves for each member of the frame in Figure P5.44. Sketch the deflected shape. Treat the shear plate connection at \(B\) as a hinge. 45 kips B A w = 4 kips/ft 6" C DIA 8'
Draw the shear and moment curves for each member of the frame and draw the deflected shape. Joints \(B\) and \(C\) are rigid. w = 1 kip/ft B w = 1 kip/ft 20- D 16' w = 1 kip/ft
Draw the shear and moment curves for the column in Figure P5.46. Sketch the deflected shape. The load \(P\) is equal to \(55 \mathrm{kips}\), and the load is eccentric from the column centerline with
For the frame in Figure P5.47, draw the shear and moment curves for all members. Next sketch the deflected shape of the frame. Show all forces acting on a free-body diagram of joint \(C\). T 6' 20
(a) Sketch the deflected shape of the frame in Figure P5.48. Reactions and moment curves are given. Curvature is also indicated. Joints \(B\) and \(D\) are rigid. The hinge is located at point \(C\).
Draw the shear and moment curves for all members of the frame in Figure P5.49. Sketch the deflected shape. T 4' 6' 6' L B D 3 kips/ft 6'- 4 kips/ft +6 6' E
The hollow structural section beam \(A B C D\) in Figure P5.50 is supported by a roller at point \(D\) and two links \(B E\) and \(C E\). Compute all reaction, draw the shear and moment curves for
The combined footing shown in Figure P5.51 is designed as a narrow reinforced concrete beam. The footing has been proportioned so that the resultant of the column loads passes through the centroid of
The two concentrated loads, supported on the combined footing in Figure P5.52, produce a trapezoidal distribution of soil pressure. Construct the shear and moment curves. Label all ordinates of the
Classify the structures in Figure P5.53. Indicate whether stable or unstable. If stable, indicate whether determinate or indeterminate. If indeterminate, give the degree. 2 W hinge (a) (b) hinge (c)
Classify the structures in Figure P5.54. Indicate whether stable or unstable. If stable, indicate whether determinate or indeterminate. If indeterminate, give the degree. hinge (a) H (c) hinge A
The corner panel of a typical floor of a warehouse is shown in Figure P5.55. It consists of a 10-in.thick reinforced concrete slab supported on steel beams. The slab weighs 125 lb/ft2. The weight of
Computer analysis of a continuous beam. The continuous beam in Figure P5.56 is constructed from a W12 × 152 wide flange steel section with A = 44.7 in.2 and I = 1430 in.4. Determine the reactions,
Computer analysis. The columns and girder of the indeterminate rigid frame in Figure P5.57a are fabricated from a W18 × 130 wide flange steel section: A = 38.2 in.2 and I = 2460 in.4. The frame is
Computer investigation of wind load on a building frame.Case 1: The columns and girders of the rigid building frame in Figure P5.58 have been designed initially for vertical load as specified by the
Determine the reactions at the supports produced by the 120-kip load at midspan (Figure 6.6) (a) using the equations of static equilibrium(b) using the general cable theorem. Neglect the weight of
A cable-supported roof carries a uniform load w = 0.6 kip/ft (Figure 6.7a). If the cable sag at midspan is set at 10 ft, what is the maximum tension in the cable (a) between points B and D (b)
Establish the shape of the funicular arch for the set of loads acting on the trussed arch in Figure 6.14a. The rise of the arch at midspan is set at 36 ft.Figure 6.14a 30 kips ' 60 kips hi 60 kips 60
The three-hinged arch truss shown in Figure 6.15a has a bottom chord of the same funicular shape as that found in Example 6.3. To demonstrate one benefit of using a funicular arch shape, (a) analyze

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