000			03459nas|a2200445 i 4500
005			20260818094236.0
008			030822s2003 th uzm rtt 00| a1eng d
035			_a.b11895251
099		9	_aAIT Thesis no. ST-03-34
100	0		_aDinh Van Nguyen
245	1	0	_aDynamic analysis of framed structures with daming using eigenvector and load dependent ritz vector bases
260			_aBangkok : _bAsian Institute of Technology, _c2003
300			_a81 leaves
490	1		_aThesis ; _vno. ST-03-34
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2003
520			_aThe superposition of eigenvectors from subspace and Lanczos eigensolvers was implemented, investigated and yielded accurate response with computational efficiency. A static correction technique accounting for all higher modes as static effects were applied to increase accuracy and stability of the method. A load dependent Ritz vector algorithm was programmed and examined for various types of frames. Those Ritz vectors are proved to account for spatial distribution of loads, only a small number of vectors can approximate the response of the structure. More approachable to practical structures, a nonproportional damping solution by the combination of vector superposition and pseudo force methods was worked out and tested for structures with externally nonproportional damping modeled by discrete dampers. By vector superposition analysis, the real behaviors of the structure under loading are well visualized. The accuracy and operational time of the calculation process can be controlled showing that the vector superposition method is a good choice for dynamic analysis of large structures. Furthermore, originating from the advantages of vector superposition method and from LD Ritz vectors, a nonlinear dynamic analysis algorithm based on Newmark's integration scheme using updated LD Ritz vector basis was proposed and has preliminarily been implemented.
650		0	_aStructural frames
650		0	_aStructural dynamics
650		0	_aEigenvectors
700	1		_aKim, Kidu, _eChairperson
700	0		_aPichai Nimityongskul, _eExamination Committee
700	0		_aPennung Warnitchai, _eExamination Committee
710	2		_aAsian Institute of Technology, _eScholarship donor
710	2		_aVietnam Ministry of Education and Training (MOET), _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ST-03-34
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B08250
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