Entries from January 2009

Height limitations are often imposed on multistory buildings based on zoning regulations, economic requirements and esthetic considerations, including the need to match the floor heights of existing buildings. The ability to meet these restrictions is an important consideration in the selection of a framing system and is especially important when the framing system is structural steel. Web openings can be used to pass utilities through beams and, thus, help minimize story height. A decrease in building height reduces both the exterior surface and the interior volume of a building, which lowers operational and maintenance costs, as well as construction costs. On the negative side, web openings can significantly reduce the shear and bending capacity of steel or composite beams.
(more…)
Categories: Engineering Code
January 27, 2009 · 1 Comment

Column base plate connections are the critical interface between the steel structure and the foundation. These connections are used in buildings to support gravity loads and function as part of lateral-load-resisting systems. In addition, they are used for mounting of equipment and in outdoor support structures, where they may be affected by vibration and fatigue due to wind loads.
(more…)
Categories: Engineering Code

This book contains lecture notes, albeit not covering all materials, delivered at the course on Advanced Earthquake Engineering Analysis that took place at CISM Udine in July 3-7, 2005.
During the last decade, the state of the Art in Earthquake Engineering Design has made significant steps towards a more rationale analysis of structures. Scientists have long recognized that earthquake design is guided by displacements and deformations rather than forces. However due to the historical background of structural engineers in static analyses, effects of earthquake on structures have been viewed as forces acting on the structures. All presently available design building codes are developed along these lines.
(more…)
Categories: Engineering Book

The aim of this publication is to (re-) introduce practical designers to the use of Yield Line Design. The intention is to give an overall appreciation of the method and comprehensive design guidance on its application to the design of some common structural elements. It assumes that the user has sufficient experience to recognise possible failure patterns and situations where further investigation is required.
(more…)
Categories: Engineering Book
January 21, 2009 · 1 Comment
Categories: Engineering Book
January 21, 2009 · 1 Comment
Categories: Engineering Book
January 15, 2009 · 1 Comment

This paper is one of a planned series which deals with the design and use of rationalized structural connections. It draws heavily on the excellent work done in the publication “Design of Structural Connections” by Tim Hogan and Ian Thomas. Since that time, there has been new research, some variations to the design models, new steel grades introduced and some minor changes in section properties. We have also seen the adoption of sophisticated 3D modeling software which has the capability to generate many different connection types. The ASI, through this project is endeavouring to provide an industry wide rationalized set of dimensions, models and design capacities.
(more…)
Categories: Engineering Journal

Early attempts of optimised structural designs go back to the 1600s, when Leonardo da Vinci and Galileo conducted tests of models and full-scale structures [1]. A 1994`s review of structural optimization can be found in the study by Cohn and Dinovitzer [2], who pointed out that there was a gap between theoretical studies and the practical application in practice. They also noted the short number of studies that concentrated on concrete structures. A review of structural concrete optimization can be found in the 1998`s study by Sarma and Adeli [3].
(more…)
Categories: Articles

For industrial partners, actual simplified design rules in line with the growth of knowledge regarding earthquake engineering are essential for competitiveness. As turbo generators are placed all over the world, i.e. in different seismic hazard zones, not only machine sets but also the foundations have to be standardised and able to resist certain earthquake loading levels. Prior to the release of new or revised turbo generators (foundations), extensive static and dynamic calculations are carried out to confirm the foundation outline and basic dimensions, and also verifying the resistance against unfavourable load combinations. Based on gained knowledge of detailed seismic analyses, practical design approaches have been elaborated for different kind of foundation types (mainly spring mounted, table mounted and raft foundations); and, for some machine manufacturers, summarised in specific design criteria.
(more…)
Categories: Engineering Journal

Dynamic analysis to evaluate the response of earth structures to dynamic stress applications, such as those produced by earthquakes, blasting, wind loading or machine vibrations are finding increased application in civil engineering practice. In the present investigation the authors have calculated the dynamic soil parameters, the coefficient of elastic uniform compression (Cu), coefficient of elastic uniform shear (Cτ), coefficient of elastic non-uniform compression(Cφ) and coefficient of elastic non-uniform shear(Cψ) by performing laboratory model cyclic tests on annular footing resting on un-reinforced and reinforced earth beds.
(more…)
Categories: Engineering Journal