STRUCTURAL ANALYSIS-2

                 III B.Tech I Semester(R05) Supplementary Examinations

               STRUCTURAL ANALYSIS-2

1. A circular arch of span 25 m with a central rise 5 m is hinged at the crown and springing. It carries a

point load of 100 kN at 6 m from the left support. Calculate.

(a) the reactions at the supports and the reaction at crown

(b) moment at 5 m from the left support. [16]

2. A parabolic arch, hinged at the ends has a span 30 m and rise 5 m. A concentrated load of 12 kN acts

at 10 m from the left hinge. The second moment of area varies as the secant of the slope of the rib

axis. Calculate

(a) the horizontal thrust and the reactions at the hinges,

(b) the maximum bending moment anywhere on the arch. [16]

3. Explain the Portal method for analyzing a building frame subjected to horizontal forces. [16]

4. A beam ABC, 10 m long, ¯xed at A and C is continuous over joint B. The ¯rst span consists of 5 m

with point load of 5 kN acting 3 m from left support and second span is loaded with central point load

of 8 kN. The beam has constant El for both the spans. Using the slope de°ection method, compute

the end moments and plot the bending moment diagram. [16]

5. Explain the two cycle moment distribution method for maximum negative moments at various joints

of a frame with an example. [16]

6. Explain the rotation contribution method for the frames with columns of equal height and subjected

to vertical loads only with ¯xed ends and also hinged ends.

[16]

7. (a) Obtain the sti®ness matrix for a general beam element.

(b) Explain the analysis using sti®ness method. [8+8]

8. Explain Kani's method for frames with side sway. [16]