6TH SEM DESIGN OF STEEL AND MASONARY STRUCTURES VI SEM Diploma Examination CIVIL ENGINEERING

Model Question Paper   VI SEM Diploma Examination CIVIL ENGINEERING DESIGN OF STEEL AND MASONARY STRUCTURES Time:3Hours                                                                                        (max marks:100) 1   Inastructructions: (1)   Answer any two full questions from each part. 2.        Assume missing data suitably. 3.        Steel tables will be supplied.       PART-A 1.  (a)List the advantages and Dis advantages of bolted connections.  6  Marks.                                                                                                                           (b)                                                                                                        9Marks.   2  (a)  Two steel plates 100mm x 10mm and 80mm x 12mm are connected by 6mm fillet weld.Find the maximum force transmitted in the joint and the lap length. Assume allowablestress in steel -150 N/mm2. Allowable stress in weld 105 N/mm2.                                                                                                     7  Marks.                           (b)                                                                                                     8Marks.   3   A simply supported beam of span 6m carries 30 KN/m super imposed load .           Design the rolled steel beam and also check for shear and deflection.                                                                                                                 15Marks.                    PART B     4.        An ISLB 400 @ 569 N/m with cover plates 300 mm x 20 mm is used as a column for supporting all inclusive load of 2000KN. Design a gusseted base plate for the column. Assume bearing strength of concrete 5 N/mm2 and bearing strength of steel base plate 190N/mm2.                                                                                                            15marks   5.         A strut in a truss is 3.25 m long and is subjected to an axial compressive force of 500 KN. The member consists of two unequal angles. Design the section. The permissible compressive stress fro the member shall be taken conforming to  I.S. specifications. Take fy= 250 N/mm2                                                                                                         20 marks                6..a Explain the method of calculating the net area of                   6 marks                            i. Single angle at one side of gusset plate.                                                                                          ii. Double angle placed back to back on one side of gusset plate                                                   (b) Design a single angle tension member to carry tensile load of 150KN     14 marks                                                                     PART C   7          A masonry dam trapezoidal in section, retains water on its vertical face other details are as   follows.             Height of dam =12m.                                                 Maximum depth of water stored –11m.                                                         Top width of dam =2m                                               Density of masonry –23kN/m3                                                           Density of  water – 10 kN/m3                                                            Coefficient of friction between the foundation masonry and                                    soil = 0.57.Find the minimum bottom width required and also check for stability                                                                                                15 marks.   8          A retaining wall1.2m wide at top and 3mwide at base with vertical face retaining earth is 5m high. The surface of earth is in level with the top of retaining wall. The earth pressure varies from zero at top to 35KN/m2at the bottom . Determine the maximum and minimum stress intensity at the base. given unit weight of masonry      as25 KN/m3 and weight of earth is 15 KN/m3. Check the stability of wall ifco -efficient of friction is 0.6                                                                                                                                                                    15 marks.