The investigation dealt mainly with the shear transfer capacity of a joint between a precast concrete column and a cast-in-place concrete beam. Four reinforced concrete frames, each consisting of two columns and two beams, were cast, assembled and tested in a special loading frame. To obtain a general pattern of failure mechanisms, a series of loads consisting of different ratios of moments, shears and axial forces were imposed on these frames. All recording of test data was done electronically in the form of punched tape to facilitate computer analysis. The investigation showed clearly that high values of shear transfer can be reached even under the most adverse load conditions. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

Under seismic excitation, the centre of stiffness of an eccentric structure is stationary as long as the structure remains elastic. Once yielding occurs, the centre of stiffness will begin to move away from its original position, as the torsional forces induced by the eccentricity cause uneven distribution of yielding among members. This movement of the centre of stiffness very often increases the eccentricity of the structure causing further damage. The purpose of this thesis is to determine the significance of this magnification of the initial eccentricity. A procedure for locating the centre of stiffness was developed and incorporated into a time-step dynamic analysis program code named DRAINTABS. Two models were chosen to describe the moment-rotation relationship of reinforced concrete members; the elasto-plastic model and the Takeda model. The former is a bilinear model whereas the latter takes into account the strength degradation of reinforced concrete members under cyclic loading. A number of reinforced concrete buildings were studied. It was found that the centre of stiffness did not always move towards the side of the structure which was more heavily loaded due to the torque induced by the eccenticity. Excursions in the other direction were possible when the translational motion was not in phase with the torsional motion at the instant of maximum excursion. Moreover, when the strength degrading characteristic of R/C members was modelled, the eccentricity of the structure increased gradually with increasing length of excitation. However, this increase was found to be small and therefore insignificant. The procedure for locating the centre of stiffness was also incorporated into another analysis program code named PITSA which utilizes the modified substitute structure method. The results obtained were compared to those obtained using DRAINTABS. Although PITSA has been proven to be a relatively inexpensive yet reliable alternative to a time step analysis, it failed to predict the maximum displacement of the centre of stiffness with any acceptable degree of accuracy. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

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No description available.

The purpose of this paper is to present the development and use of a computer program to perform an automated structural design of two dimensional static concrete structural systems. The structural systems considered herein are composed of reinforced concrete beams and columns connected by rigid joints. Structural systems composed of large numbers of joints and members may be analyzed by using the developed program. The paper presents the development of the structural analysis using the displacement method and matrix techniques and the development of the concrete axial-moment interaction criteria. This criteria is based on the ultimate strength design using the 1971 ACI Building Code requirements. A detailed sample problem of a four story concrete building structure is presented. The sample problem gives the details of computer program input and output. The presented computer program is written FORTRAN language.

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Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references (leaves 119-121). Also available in electronic version.

Thesis (M.S. in in civil engineering)--Washington State University, December 2009. / Title from PDF title page (viewed on Jan. 26, 2010). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 42).

Akademisk avhandling - Chalmers tekniska hogskola, Gothenburg, Sweden. / "Doktorsavhandlingar vid Chalmers tekniska hogskola." Bibliography: p. [441]-444.