Honors Projects for Civil Engineering

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    Stiffness Analysis of the Academy Towers Building Honolulu, Hawaii
    ( 1974) Chan, Kin Lek ; Taoka, George
    The Academy Towers Building is located at the corner of Ward Avenue and Green Street in Honolulu, Hawaii.It is a twenty-seven (27) story building consisting of two dwelling units per floor. A special structural feature of this building is that there is a very stiff beam on the roof of the building. This increases the stiffness of the building thus reducing the lateral displacement of different floors due to lateral forces. A stiffness analysis of the structure is the basis of my investigation. The displacement of all floors are computed as the building is subjected to wind or earthquake. Wind load and earthquake load are computed according to the 1973 uniform Building Code,Part VI, Chapter 23, on general design requirements. The period of the building is also computed. The same analysis is done again on the same building with the assumption that there is no stiff beam on the roof. It is concluded that the stiff beam on the roof reduces the displacement due to earthquake load by 40% and also the period is also reduced by 10% to 20%.
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    The Numerical Solution of the Navier- Stokes Equations for an Incompressible, Inviscid Fluid with a Free Surface
    (University of Hawaii at Manoa, 2014-01-15) Mark, Kenneth ; Hamada, Harold ; Civil Engineering
    This paper discusses a method of describing the time-dependent motion of an incompressible, inviscid (ideal) fluid in two dimensions. The fluid in this project has rigid boundaries on all sides except for a free surface over which there is assumed to be a uniform pressure. The effects of gravity and this free surface condition will be studied. To describe fluid's motion the Navier Stokes equations, in two forms – Lagrangian and Eulerian – will be utilizaed. Basically the method involves coupling the Eulerian and Lagrangian systems of equations. The Lagrangian equations follow the location of the free surface and all elements of the fluid, and also determines fluid particle velocities. Composed of a fixed coordinate system, the Eulerian system is used to compute the pressure at various points in the fluid. With the advent of the Computer Age, the non-linear terms of the Navier Stokes equations, which classical theory neglected, can be retained and solved by numerical methods. This project employs the IBM 360, a high speed computer with a large memory core, to solve the Navier Stokes equations by the finite difference method. Although much work on the numerical solution of these equations for different fluid conditions has been done in the last few years, there has been no previous solution for this particular problem.
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    Lateral Load Analysis of the Academy Towers Building, Honolulu, Hawaii
    (University of Hawaii at Manoa, 2014-01-15) Lum, Peter ; Civil Engineering
    The Academy Towers Building is a relatively new condominium located at the corner of Ward Avenue and Green Street in Honolulu, Hawaii. It is a twenty-seven (27) story building consisting of two dwelling units per floor. A lateral load analysis of this structure is the basis of this investigation. Forces, reactions and displacements of important joints and members of each floor are computed for both wind and earthquake loadings. Wind loads and earthquake loads are computed according to the 1973 Uniform Building Code, Part VI, Chapter 23, on general design requirements. A unique structural feature of this building is the extremely stiff beams located on the roof which affect the response of lateral loadings significantly in this study. It is concluded that the stiffness of the shear walls and the stiff beams on the roof are dominant factors in resisting lateral deformations to wind and earthquake loads.
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    Stream Water Quality as a Function of Runoff From Different Land Users
    (University of Hawaii at Manoa, 2014-01-15) Lee, Ronald ; Young, Reginald ; Civil Engineering
    Manoa Stream was selected for this study relating stream pollution and various land use classifications. In addition, the concentrations of chemical, physical, and bacteriological parameters were also compared with State water quality standards to see if the water was polluted according to this criteria. The stream was divided into different stations with corresponding drainage basins, each of which contained different land types. Water samples were collected at the different stations by Ching (1) and analyzed, and flows were approximated by analytical methods since they were not measured by Ching at the time of sampling. With the concentration of constituents, land areas, and flow values the pollution load, in lbs/acre/day, for each incremental drainage area was then calculated and subsequently related to various land activities. It was concluded that mountainous areas, where rains, containing constituents from the atmosphere (6), fall initially and most severely, and heavy vegetation contribute substantially to the pollution loading of the stream. In urban areas, an increase in pollution load is generally noted for a corresponding increase in urban activity, such as an increase in residential land use. In addition according to Chapter 37-A of the Public Health Regulations (7), the bacteriological levels in Manoa Stream, which is classified as class 2 waters, exceeds the bacteriological standards defined in those regulations. Also, since Manoa Stream flows into the Ala Wai Boat Harbor, total phosphorus and total nitrogen standards are violated.
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    Characteristics of Solar Radiation in Hawaii
    (University of Hawaii at Manoa, 2014-01-15) Law, Kincho ; Yoshihara, Takeshi ; Civil Engineering
    A survey has been made to investigate the characteristics of solar radiation in Hawaii. Solar radiation data for over 60 monitoring stations have been examined, and they are generally located in the low elevation plain areas. Correlation study indicated that median annual rainfall intensity is related closely to mean annual insolation levels. However, rainfall is not a good indicator for direct forecast of insolation. The model of clear sky insolation on horizontal surface has been studied. A Fortran computer program has been written for simulation of clear sky insolation. The similarity between the diurnal insolation patterns and the clear sky patterns indicates that the clear day model may be used to estimate the actual insolation. For estimating the long term mean annual insolation, a model is proposed to compare one year of data at any site to a currently existing monitoring station. The mean monthly insolation of a station may be estimated if the mean annual insolation of that station is known.