GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code:2180610 Date:17/05/2019Subject Name:Design of Steel Structures
Time:10:30 AM TO 01:30 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
- Use of IS: 800, IS: 875 and Steel Tables is permitted.
- Consider fy = 250 N/mm? and fu = 410 N/mm? if not mention
--- Content provided by FirstRanker.com ---
Q.1 (a) What are the points at which a plastic hinge is likely to form? 03
--- Content provided by FirstRanker.com ---
(b) State the factors to be considered for the planning and site selection of 04 an industrial building.(c) Design a suitable section for a two span continuous beam, each having 07 a span of 5 m and supporting a dead load of 18 kN/m and live load of 21 kN/m by plastic design approach.
Q.2 (a) What is the difference between beam and plate girder. 03
(b) Determine the plastic moment capacity of ISMB 500 with top plate 300 04 mm x 20 mm
(c) Determine plastic moment capacity for given frame as shown in fig-1 07
--- Content provided by FirstRanker.com ---
OR
(c) Design a bolted framed connection to connect an ISLB 350 07 transmitting an end reaction of 450 kN to the web of ISMB 550
Q.3 (a) Explain concept of Plastic design method. Give advantages of plastic 03 design method.
(b) What are the various types of stiffeners as stipulated by IS 800:2007 04 and their functions.
(c) Derive the collapse load for propped cantilever beam of length L, 07 subjected to concentrated load W at center.
--- Content provided by FirstRanker.com ---
OR
Q.3 (a) Differentiate between Limit State Method and Working Stress Method 03 of Design.
(b) What are external and internal wind pressure co-efficient. Give codal 04 provision for internal wind pressure co-efficient for a building.
(c) Design a unstiffened seat connection for a factored beam end reaction 07 of 150 kN. The beam section is ISMB 200 connected to the flange of column section ISHB 250 using bolted connections. Steel is of grade Fe 410 and bolts of grade 4.6
Q.4 A gantry girder of 6.2 m span is to be designed for crane capacity of 14 260 kN. The effective span of crane girder is 18 m. Weight of crane girder excluding crab is 210 kN and weight of crab is 65 kN. Take clearance as 1.2 m and wheel base as 3.0 m. Choose suitable section and check the bending stresses and deflection.
--- Content provided by FirstRanker.com ---
OR
Q.4 Fix the configuration of a howe type roof truss for an industrial 14 building with 25 m span and 120 m length. The roofing is galvanized iron sheeting the basic wind speed is 50 m /s and terrain is open industrial area and building is class A. The clear height of building at the eaves level is 9 m. Design the purlin and rafter.
Q.S A plate girder of 22 m span carries a UDL of 40 kN/m, inclusive its self-weight. It is also subjected to two moving loads 220 kN & 350 kN and the distance between two loads is ‘2.4 m’. Design the thin web girder with vertical intermediate stiffeners without using tension field method, which can satisfy stress and deflection criteria. Connections design and design of end bearing stiffener are not required.
OR
--- Content provided by FirstRanker.com ---
Q.S A foot over bridge is of span 18 m and pedestrian load of 3 kN/m?. The clear distance between two trusses is 3.0 m and truss height is 2.0 m. Take dead weight of truss is 1.2 kN/m. Assume Self weight of flooring 480 N/m?, Self weight of cross beam 300 N, Weight of one truss 400 N/m. Select type of truss and Design a) cross beams (b) most heavily loaded top chord member (c) Vertical member.
20kN 15.kN
b
6 mMp
4m B o~ 20kN/m
--- Content provided by FirstRanker.com ---
5m2Mp Mo
Fig.1
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University