The present status of plastics is one of constant change, but
this thesis attempts to focus attention on the state of the industry as of
1967. Beginning with a brief title definition and history of plastics,
the writer proceeds to a discussion on the structural characteristics
of plastics. Under this...
Creep in wood has been observed since 1833 but only recently
has it been studied quantitatively. The aim of this paper is to study
the time-dependent deflections of Douglas fir, Coast Region beams
in bending and shear modes. The general method of approach used is
that of large scale observation....
There are several factors which affect the cost and efficiency
of a structure. The most important and basic factors are: the predominant
stress, the way the structure carries the loads and the
shape of the structure.
The structures in which the predominant stress is not bending
have been chosen to...
An attempt to determine the relationship between the computer,
the computer program exchange organization and today's practicing
civil engineer has just been completed. A questionnaire was used to
obtain information and opinions from 850 selected practicing civil
engineers. Based on those questionnaires reaching their addresses,
a return rate of 81.7...
A computer program was developed for estimating construction
pore pressures in embankments without drainage at any location in
the embankment at any time during construction. This program incorporated
a modification of the Hilf-Brantz method of pore pressure
calculation and a finite element method of stress computation.
Previous methods of calculating...
By assuming the linear superposition principle to be valid, the
hydrodynamic forces on a horizontal cylinder under waves and current
are examined. In this study, towing a cylinder in waves is used to
simulate a cylinder under waves and current. The experimental
technique is proved valid through theoretical considerations and...
Resistance of reinforced concrete beams to diagonal tension
was studied in a series of papers which included beams without
web reinforcement and beams with various types of web reinforcement.
The magnitude of the loading causing the formation of initial
diagonal tension cracks depended primarily on the dimensions of
the cross...
Random waves are often expressed as a mathematical superposition
of an infinite number of sinusoidal components. The mean square spectral
density of the water surface elevation is often called the wave spectrum.
The zero upcrossing wave heights usually have a Rayleigh probability
distribution. However, the design wave concept is still...