43 research outputs found
Dynamic behaviour of steel moment-resisting frames with a concrete slab on metal sheeting
No full textConstant and variable amplitude cyclic behaviour of welded steel beam-to-column connections
No full textThis article presents a study on welded beam-to-column joints of moment-resisting steel frames. The
main features of the joint specimens are summarised, in order to identify key parameters influencing
the joint response as well as their low-cycle fatigue endurance. The cyclic behavior and the lowcycle
fatigue strength of the connections were initially assessed by cyclic quasi-static testing, carried
out at the Technical University of Milan. Analysis of the results has been carried out in order to
verify the validity of a linear damage accumulation model combined with a low-cycle fatigue
approach based on S-N lines concept. Moreover, a criterion to predict the type of failure and a procedure
of appraising the fatigue endurance are presented and their validity proved by the results of
variable amplitude tests
A sustainable seismic input reduction system for monuments, for existing and new structures by creating large, stiff and strong foundations - practical applications
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Influenza della componente verticale sul danno
No full textIl lavoro considera l’effetto sul danneggiamento strutturale della componente verticale di terremoti superficiali near field. Sono presentati e commentati i danni registrati durante recenti terremoti europei di questo tipo. I risultati di prove su tavola vibrante e di semplici analisi numeriche suggeriscono che l’effetto può essere di due tipi: (a): degrado delle proprietà’ meccaniche della malta causato dalle alte frequenze contenute nell’accelerazione verticale; (b): significativo incremento degli sforzi normali verticali anche per eccitazioni di intensità’ moderata
The Soil-Structure Interaction Problem as it is Dealt with by Various Codes for Earthquake Resistant Design of Structures
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The Haiti Earthquake Mw = 7.0 of January 12th 2010: Structural and geotechnical engineering field observations, near-field ground motion estimation and interpretation of the damage to buildings and infrastructure in the Port-au-Prince area
No full textBehaviour of buried pipelines subjected to external loading.
No full textThe research presented in this Thesis was carried out at the University of Sheffield under
the supervision of Dr I. C. Pyrah and Dr W. F. Anderson, and Mr G. Leach at British Gas
Engineering Research Station (ERS). The research was financially supported by a British
Gas Research Scholarship and by the Overseas Research Students Awards Scheme.
The Author would like to express his sincere gratitude to his supervisors for their invaluable
help, guidance and encouragement during the development of the research.
The Author is also grateful to Dr S. R. Mi for his interest and assistance throughout the
research. Special thanks also go to Dr S. J. Wheeler for his supervision during the first year
of the research and sound advice in the initial stage of the work.
The Author would like to express his gratitude to all members of the geotechnics group at
the University of Sheffield for the useful discussions and comments. Special thanks and
appreciation are extended to the staff at the ERS, particularly Mr E. Middleton for
providing the data of the field tests and constructive comments.
The laboratory tests were performed at ERS Soils Laboratory for which the Author is
thankful to the laboratory staff. The Author must also thank British Gas for providing the
computer hardware and software for performing the numerical analyses, and the printing
facilities to produce the Thesis. Thanks also go to Mr D. Reay and Mr B. Bellwood at the
Gas Research Centre of British Gas for ensuring continuous financial support throughout
the award period.
Finally, the Author wishes to thank his family and friends for their endless support and
encouragement throughout the period of study in the UK. Without them, this Thesis may
never have been completed
Recent earthquake activity in Trichonis region and its tectonic significance
No full textSUMMARY. - The aftershock activity associated with the central Greece<br />(Trichonis Lake) earthquake of |une-Dec. 1975, has been studied, with emphasis<br />on the time and magnitude distribution. It has been found that the value of b,<br />in Gutenberg - R i c h t e r ' s relationship was near the same for the primary as<br />well as the secondary or second order aftershocks of the sequences, but depends<br />upon the focal depth.<br />A correlation between the calculated focal mechanisms and the associated<br />stress components to the distribution pattern of meizoseismic effects as well<br />as to the geological structure of the seismic region was found.<br />The seismic region lies at the top of an anticline which was found moving<br />downwards, apparently due to compressional stresses.<br />Within the series of three earthquakes the progress of the destruction of<br />the buildings was observed and reported. The interest is concentrated to modern<br />buildings out of reinforced concrete and infill brick walls. The relatively unexpected<br />rather bad performance of the later case of buildings was compared to that<br />of the traditional small houses out of brick or stone masonry, the behaviour of<br />which may be considered as better from what it was expected
