Also Reimer's dissertation (Ph. D. in Engineering)--University of California, Berkeley, June 1973. / "October 1973." Includes bibliographical references.

Work toward developing a simple method for the aseismic design of structures considering energy dissipation as the prime design parameter is reported. Viscous damping is used to represent the non-structural energy dissipating elements in the system, and hysteretic energy dissipation is considered explicitly. A detailed parametric study of the energy dissipation characteristics of single degree of freedom systems is reported first. Here the amount of energy dissipated by both hysteretic and viscous damping mechanisms in each system is determined for various ground motions, viscous damping values, system strengths etc. The results of this study are presented in the form of spectra, relating total energy dissipated, and energy distribution between mechanisms to known system properties. The results and insights gained from the parametric study are incorporated into a design method which accounts explicitly for energy dissipation. The inclusion of a system strength parameter in the input of the proposed method is found to he most useful in terms of the limit state philosophy employed in the most recent editions of building codes. Also if special damping devices are to he built into the structure, this method will facilitate such design. Finally a preliminary study of the energy dissipation characteristics of multi-degree of freedom systems is reported. Here the distribution of energy dissipated by viscous damping and hysteresis, together with the location of the effective dissipating mechanisms within the structure, is studied. In particular the possibility of extrapolation from single degree of freedom spectra to the multi-degree of freedom systems is investigated and shown to give encouraging results. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

No description available.

No description available.

Thesis (Ph. D.)--University of Washington, 2002. / Vita. Includes bibliographical references (leaves 228-244).

Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, September 2002. / Thesis advisor(s): Joshua H. Gordis. Includes bibliographical references (p. 49-50). Also available online.

Thesis (Ph. D.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.

Thesis (Ph. D. in Geophysics)--University of California, Berkeley, June 1977. / "January 1977." Includes bibliographical references.

No description available.

Inelastic behavior is inevitable in most structures subjected to strong earthquake forces. Any rational design procedure, therefore, should attempt to estimate the amount of inelastic behavior to be expected in each member of the structure. Methods of dynamic response analysis based on linear elastic assumptions can be carried out conveniently and economically. Such methods, however, can not provide any direct information on the inelastic behavior of the structure. On the other hand, time-step analysis programs can 'truly' simulate the non-linear behavior of the structure but are seldom used because of their cost and complexity. There is, therefore, a need for practical and efficient methods which can account for the inelastic behavior. Some methods for estimating the inelastic response and damage patterns of structures under ground motions are presented. One is the Modified Substitute Structure Method which is now revised so that the structure can be analysed for gravity loads prior to the seismic analysis. The other method which is proposed here uses a static analysis. The structure is first analysed for gravity loads and then lateral seismic forces (as given by the appropriate codes) are applied. The amplitude of the lateral forces is gradually increased, maintaining the specified pattern; a plastic hinge is placed where a member has yielded and the structure stiffness matrix revised each time. This process is continued until the structure has reached a predetermined displacement. At this point, the rotation of the plastic hinges is known and then the member curvature ductilities can be calculated. Thus, an idea is obtained, of the damage pattern in the structure. A computer program has also been written for analysing the structures by 'Freeman's Method' to predict the inelastic response of structures under severe ground motion. The method gives the overall inelastic response without predicting the pattern of local damage. These various methods are then compared by analyzing two idealized structures. A third, real structure, an office/residential building in downtown Vancouver is also analysed by these methods and the results compared with those obtained by a time-step analysis program DRAIN-2D. These methods appear to give good results and it is hoped that they will be found useful by practising engineers. A user's guide and the listing of these programs are included in the appendices. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate