Thesis (Ph. D.)--University of Canterbury, 2002. / Typescript (photocopy). Includes bibliographical references (p. 179-186).

yes / The behaviour of seismic-resistant buildings relies heavily upon the inclusion of energy dissipating devices. For concentrically-braced frames, this function is accomplished by diagonal bracing members whose performance depends upon both cross-sectional properties and global slenderness. Traditionally preferred rectangular hollow sections are susceptible to local buckling, particularly in cold-formed tubes, owing to the residual stresses from manufacture. This paper explores the response of hollow and concrete-filled circular tubes under cyclic axial loading. The uniformity of the circular cross-section provides superior structural efficiency over rectangular sections and can be further optimised by the inclusion of concrete infill. A series of experiments was conducted on filled and hollow specimens to assess the merit of the composite section. Comparisons were drawn between hot-finished and cold-formed sections to establish the influence of fabrication on member performance. Two specimen lengths were utilised to assess the influence of non-dimensional slenderness. Parameters such as ductility, energy dissipation, tensile strength and compressive resistance are presented and compared with design codes and empirically derived predictions.

This study presents the theoretical analysis of an active flutter suppression methodology applied to a smart fin. The smart fin consists of a cantilever aluminum plate-like structure with surface bonded piezoelectric (PZT, Lead- Zirconate-Titanate) patches. A thermal analogy method for the purpose of modeling of piezoelectric actuators in MSC&reg / /NASTRAN based on the analogy between thermal strains and piezoelectric strains was presented. The results obtained by the thermal analogy were compared with the reference results and very good agreement was observed. The unsteady aerodynamic loads acting on the structure were calculated by using a linear two-dimensional Doublet-Lattice Method available in MSC&reg / /NASTRAN. These aerodynamic loads were approximated as rational functions of the Laplace variable by using one of the aerodynamic approximation schemes, Roger&amp / #8217 / s approximation, with least-squares method. These approximated aerodynamic loads together with the structural matrices obtained by the finite element method were used to develop the aeroelastic equations of motion of the smart fin in state-space form. The Hinf robust controllers were then designed for the state-space aeroelastic model of the smart fin by considering both SISO (Single-Input Single-Output) and MIMO (Multi-Input Multi-Output) system models. The verification studies of the controllers showed satisfactory flutter suppression performance around the flutter point and a significant improvement in the flutter speed of the smart fin was also observed.

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves [179]-199). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves [179]-199). Also available on the Internet.

The thesis deals with the design and assessment of all supporting parts of a cast-in-place reinforced concrete sewage tank in a wastewater treatment plant. The thesis includes a technical report, static analysis, drawing documentations, construction process and visualization. The drawing documentation consists of shape and reinforcement drawings of supporting parts.

The thesis deals with design and assessment of all supporting parts of cast-in-place reinforced concrete tank. The thesis includes a technical report, static analysis, drawing documentations, construction proces and visualization. The drawing documentation consists of shape and reinforcement drawings of supporting parts.

The thesis deals with the analysis of a reinforced concrete digestate tank. The tank is built as a semi-underground construction. The roof is designed as a reinforced concrete dome, which is prestressed in a circular beam with prestressing cables - monostrands. The calculation of internal forces were performed by the software SCIA Engineer. The structure was assessed for the ultimate limit state and the ultimate serviceability state, in terms of watertightness for the width of cracks.

El Complejo Deportivo Cultural no Convencional, está ubicado en la zona industrial del Cercado de Lima, en una zona que se encuentra en proceso de cambio de zonificación (de Industrial a Comercial y Residencial). El proyecto se ubica en este lugar, no solo por un déficit de la tipología en la zona, sino también para brindar un espacio urbano importante para los usuarios de a pie y residentes de la zona. Uno de los aspectos más importantes para desarrollar este proyecto, fue la utilización de la estructura como un elemento de diseño arquitectónico, el cual ayuda a evocar la historia y dejar la huella de la zona industrial que existe, pero dejará de existir, por medio de la materialidad y la forma utilizada. Este proyecto funciona como un filtro urbano dentro de la zona. / The Non-Conventional Cultural Sports Complex is located in the industrial area of Cercado de Lima, in an area that is in the process of changing its zoning (from Industrial to Commercial and Residential). The project is carried out in this place, not only due to a deficit of the typology in the area, but also to provide an important urban space for pedestrians and residents of the area. One of the most important aspects to develop this project was the use of the structure as an architectural design element, which helps to evoke the history and leave the footprint of the industrial zone that exists, but will cease to exist, through the materiality and the form used. This project works as an urban filter within the area. / Tesis

El actual análisis convencional realizado para la modelación de una estructura se basa en fijar los apoyos en la base de la estructura. Dicha idealización no refleja el comportamiento real del suelo donde se cimienta. Puesto que este, dependiendo de sus parámetros geotécnicos, aporta una determinada rigidez que se relaciona con un comportamiento elástico-plástico. Se analizó los efectos en las respuestas de un sistema estructural, considerando interacción suelo estructura, variando los parámetros geotécnicos, la altura de la edificación y los modelos ISE los cuales fueron el modelo académico propuesto A.E. Sargsyan, el modelo propuesto por D. D. Barkan y O.A. Savinov y la Norma Rusa SNIP 2.02.05-87. Los tipos de suelos empleados para el desarrollo fueron arena limosa (SM-S2) y arena pobremente graduada (SP-S3). Las respuestas obtenidas se compararon con un análisis convencional empotrado en la base, con ello, se determinó las variaciones de 3 respuestas principales: el periodo, lo esfuerzo y las derivas. Se determina que el rango estimado en que aumenta el periodo la estructura es de 21% a 41% y la derivas entre un 23% y 58%, demostrando el cambio de comportamiento de la estructura al considerar la rigidez del suelo. / The current conventional analysis performed for the modeling of a structure is based on fixing the supports at the base of the structure. This idealization does not reflect the real behavior of the soil where it is sown. Since this, depending on its geotechnical parameters, provides a certain stiffness that is related to an elastic-plastic behavior. The effects on the responses of a structural system were analyzed, considering soil structure interaction, varying the geotechnical parameters, the height of the building and the ISE models which were the proposed academic model A.E. Sargsyan, the model proposed by D. D. Barkan and O.A. Savinov and the Russian Standard SNIP 2.02.05-87. The types of soils used for development were silty sand (SM-S2) and poorly graded sand (SP-S3). The answers obtained were compared with a conventional analysis embedded in the base, with this, the variations of 3 main responses were determined: the period, effort and drifts. It is determined that the estimated range in which the period increases the structure is from 21% to 41% and the drifts between 23% and 58%, demonstrating the change in behavior of the structure when considering the stiffness of the soil. / Tesis