t BSCS/BTCE22 IV Semester B.TECH Examination, Jan/Feb 2014 STRUCTURAL ANALYSIS Time: 3 Hours Max. Marks: 75 GROUP A: Answer any three questions. (euestion No. 1 is computsory) Q'1 Find the strain energy stored due to bending of a steel prismatic bar of cross section 100mm x 150mm deep and T lglg acting as a cant,ever supporting p load of 20KN at free end. Take E:200KN7mm^i. (05) Q.2 A beam simply supported at theend_hu, u rp* l. tt is sub.jected it equar and opposite end couples Mo. Find the slope at ihe ends and central a.ni.tiorr.lro; Q'3 A single riveted butt joint is to be prorid.d for connecting two plates 1Omm thick with 2}mmdiameter rivets. suggest the,necessary pitch and the efficiency of the joint. Take fs : 100 ,i/mmn2, fu= so Nl-- ^2, ft: r50 N/mm^2. Q'4 A hollow circular column 2m long has one of its end fixed and the other.#o' free and has to support an axial load of 500KN. Th. intemal diarneterls 0.g times the external diameter. Allowing u a"tor oi.ur*y of 4 calculate the externar and the thickness of metar .use Rankinesrs formula. (10) Q'5 A cantilever of.length I is propped at free end. The cantilever carries a uniformiv distributed loadof wper unit run. Find bil;;;;"fruu"#,r,. level of the fixed end the level oith" prop -uJu" fixed so that the lo;d may be equally shared by the supports. -rzrvs ev urqL Lrrs ru.l (r0) GRouP B: Answer any three questions. (euestion No. 6 is compursory) '| Q'6 A propped cantilever of length I is subjected to a couple M at a section distant ll4 fromthe propped end. Find the vertical reaction at the prop and the bending moment at the fixed end. r Q'7 A coluirn timber section 150; x 20pmm is 6m long both ends being o*#.t) Find the safe load for the column. use Eulers's formula and allow a factor of ^ safety of 3. Take E = 17500N/mm62 Q'8 A fixed b"rl of span o* "*i., two points of 150KN and 240N u, aiuun.!l.0) @ 2M and 4m from Gft end .Find the "nd rno,,"rt* pino also the maximuil"""' Q'9 A mild steel tube !m long, 30mm interial diameter and 4mm thick is used as a strut with both ends fixed. Find the collapsing louJuy Euler,s formula. Take E :2.1x 1065 N/mm^2. Q.10 A tension member of a truss consists of two angles gOmm x gmm.If two (10) angles are welded on either side of a-gur."t ptui" ut it . ioi* ;;G tt e";oint. , Axial tension in the member is 220KN.Permissible shea, in the welds :102.5 N/mm^2. Use 6mm.Fillet welds. v'ver ,r ,rw vvvrlr. - (10) GROUP C: AII euestions are Compulsory. ,