Showing papers in "Engineering Structures in 1980"

TL;DR: In this article, a theoretical analysis of the dynamic behavior of floating bridges is presented, where the main emphasis is placed on the wave-induced response, including a demonstration of the influences of the shortcrestedness of waves on the structural response.

TL;DR: In this paper, a simplified model of a steel jacket structure is used in a nonlinear time history dynamic analysis with a view to examining the influence of interaction damping on the response amplitudes.

TL;DR: In this article, the response of the shell of concrete cooling towers to turbulent wind is investigated by experimental methods, including measurements of wind load and shell response in model and full-scale conditions.

TL;DR: In this article, the authors measured the wind-induced dynamic response of the 235 m span cable-stayed box girder bridge that carries the M4 motorway over the River Wye.

TL;DR: In this article, the effect of geometric imperfections on the static stress distributions in cooling towers is investigated, where the antisymmetric imperfections are assumed to be localized band imperfections at some height in a tower.

TL;DR: The development of rubber structural bearings for civil engineering applications is described in this article, where a formula for the compression modulus in terms of the shape factor of the rubber block is given.

TL;DR: In this article, the reliability of the most common standard models of one-dimensional wave spectral densities applied in the design of fixed offshore structures is investigated, especially for flexible offshore platforms of the gravity type.

TL;DR: In this article, an analysis of parallel beam floor support systems under both uniform beam moment and uniform spread load is carried out. And the matrix equation which allows the uniform moment calculations to be quickly made is presented.

TL;DR: In this article, a base isolation system is described that has been demonstrated to reduce dramatically the accelerations induced in structures under earthquake motion, and the response of equipment in structures so isolated is also greatly reduced.

TL;DR: A computer procedure to calculate the second moment reliability index for any linear or nonlinear failure condition has been developed and is presented in the form of a Fortran subroutine and information regarding the relationship between reliability index and failure probability is provided.

TL;DR: In this article, a family of high-order subparametric bending elements with up to 25 nodes is developed, which are conforming elements and by including the effect of transverse shear moderately thick plates can also be analyzed.

TL;DR: In this paper, the authors show that the wind load of cooling towers is induced by the action of turbulent wind, and they elaborate the differences between the simplified approach with cp(θ) and the realistic pressure with CP(z, θ) for the pressure coefficients cp, for the response of the shell, the columns and the foundation loads, and finally for the influence on the dimensioning of the shells and the supports.

TL;DR: In this article, the authors present superior local interpolations which have been derived and optimised by considerations in the frequency domain, and then subsequently used in conjunction with an exact solution to the modal equations.

TL;DR: In this article, the problem of optimum design of rigid-plastic discrete structures is studied adopting as the design criterion the workhardening adaptation concept, the latter being meant in a narrow sense, according to which a safe structure is one not only able to adapt to statically or dynamically variable loads inside a given domain, but also strong enough for some deformation parameters (such as displacement, strain and plastic strain intensity components) to be not greater than given upper limits.

TL;DR: In this paper, the authors describe an extensive series of shaking table tests of such a device, which consisted of a notched shear pin and a natural rubber isolation system placed beneath a three-storey 40,000 lb steel frame model structure.

TL;DR: A calibration procedure capable of deriving the load enhancement factors from fully probabilistic calculations, to apply to the design of a wide range of types of structure is presented.

TL;DR: In this article, the ductility requirement of elastoplastic multi-d.o.f. shear structures is studied by analyzing the response obtained through step-by-step integration of the equations of motion for some recorded accelerograms.

TL;DR: In this paper, a nonlinear dynamic numerical model of masonry structures was used to simulate seismic excitation and it was shown that in general, a dynamic approach offers greater margins of safety than a static approach.

TL;DR: In this article, the authors show how, given a fixed set of design limitations, proper use of ductility values for different classes of structures enables an economic design to be developed for earthquake loadings.

TL;DR: In this article, the authors describe the application of a general purpose optimization code, PARS (Program for Analysis and Resizing of Structures), to the design of the sides of a 100 ton high side gondola car.

TL;DR: In this paper, the authors investigated the nonlinear response and failure mechanism of reinforced concrete frame-wall systems through the employment of a mathematical model composed of two mechanical models: a concentrated spring model used for the flexural behaviour of beam and column type members and a multiple spring model employed for the response of the wall system.

TL;DR: In this article, a computer program for calculating the buckling load and buckling shapes of columns restrained at intervals against sway and/or rotation by elastic springs is described, analysis beyond the elastic limit of the material is performed by introducing the tangential modulus in a procedure like Engesser-Shanley's.

TL;DR: In this article, peak wind induced loads on cladding panels fixed to the windward face of a building are considered and two equations are derived which describe the ratio of the peak load on a cladding panel to the mean load.

TL;DR: In this article, the squared modulus of the theoretical dimensionless frequency response functions for the wavemaker stroke spectrum, |Hs (ω)|2, and for wavemaker hydrodynamic pressure moment spectrum |HM (ω) 2, were verified experimentally for hinged wavemakers of variable-draft in the Oregon State Wave Research Facility (OSU-WRF).

TL;DR: This paper provides a solution for the class of statically determinate structures of elastic-perfectly plastic material, which has been investigated by many authors and a comprehensive treatment together with a list of references is given elsewhere.

TL;DR: In this article, the authors amplify a recent paper by Leung, 1 concerned with combining the advantages of matrix condensation and modal acceleration for linear vibrating systems, by expressing the receptance matrix for the active degrees of freedom in terms of the reduced mass and stiffness matrices associated with those degrees, together with a series based on the interior modes corresponding to the passive degree of freedom.