03648nam a2200397   450000500170000000800410001703500150005809900270007310000270010024500850012726000520021230000100026449000270027450001440030150200580044552017110050365000140221470000340222870000480226270000510231071000410236181000590240285600650246190700250252690200110255199800280256294500100259094500280260094200070262894200070263590901710264290901580281399900170297195201360298895201260312420260818134454.0310798         th                  eng    a.b10349042 9aAIT Thesis no.ST-86-151 aKuhanandha, Mylvaganam10aImperfection sensitivity analysis of geometrically non-linear structural systems  aBangkok :bAsian Institute of Technology,c1986  a24 p.1 aThesis ;vno. ST-86-15  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology  aThesis (M.Eng.) - Asian Institute of Technology, 1986  aIn this study the effect of the imperfections due to  geometrical errors with respect to the designed shapes is  considered for the reduction of load carrying capacity of  structures , with emphasis on the structures which have  geometrical symmetry under the symmetric loading. Since it is  impossible to k now a bout the magnitude and shape of imperfections  in advance, a method is proposed to select the mode of  imperfection, which could give the worst effect on the carrying  capacity compared with the load carrying capacity of the perfect  system.  The proposed method is essential to trace the  load-displacement behaviour of the perfect system including  bifurcation paths. The shapes or modes on the bifurcation paths  are used as the shapes of imperfections, expecting that one of  the shapes on these paths would give the maximum reduction of the  carrying capacity of imperfect system when the magnitude of  imperfection is given in a normalized form.  To verify the proposed method a large variety of  different initial shapes are created by using random numbers and  numerical computations are carried out on all of them to evaluate  the maximum carrying capacity with special attention whether  there are cases in which the maximum carrying capacity is lower  than that obtained by the proposed method. It is concluded from  this numerical simulation that the proposed method ca n detect the  shape of initial imperfection which reduces the carrying capacity  the most and that the detailed study of perfect structure is  necessary to study the response of the imperfect structure and  the imperfection mode along the post buckling paths of t he  perfect structure could be the worst mode. 0aStability1 aNishino, Fumio, eChairperson1 aKarasudhi, Pisidhi, eExamination Committee0 aWorsak Kanok-Nukulchai,eExamination Committee2 aDANIDA, Denmark, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. ST-86-15  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B19745  a.b10349042bmnaitcs  a240402  b2c951012dmea  fsg0  lmnait  lmnarcuv.30050160012208  c22  c40  aBarcode : 30050120687057bCREATED : 2014-04-21cRECORD # : i12790163dLPATRON : 0eLCHKIN : -f# RENEWALS : 0g# OVERDUE : 0hIUSE3 : 0iTOT CHKOUT : 0jTOT RENEW : 0  aBarcode : -bCREATED : 2016-07-04cRECORD # : i12926310dLPATRON : 0eLCHKIN : -f# RENEWALS : 0g# OVERDUE : 0hIUSE3 : 0iTOT CHKOUT : 0jTOT RENEW : 0  c58378d58378  00104070aMAINbMAINcmnaitd2026-08-18g50.00l0oAIT Thesis no.ST-86-15p30050120687057r2026-08-18 13:44:54t3w2026-08-18y22  00104070aMAINbMAINcmnarcd2026-08-18l0oAIT Thesis no.ST-86-15r2026-08-18 13:44:54t1w2026-08-18y40z3.00502E+13