Bøger udgivet af Bokforlaget Efron & Dotter AB

The book presents methods of analysis and design of earthquake-resistant buildings according to the criterion of non-destruction and with the use of nonlinear dynamic methods. It provides verification of design models of multistory reinforced concrete and steel buildings. In particular, structural schemes of buildings with full frame, frame-braced and cross-wall load-bearing systems are considered. The issues of modeling seismic effects, taking into account the interaction of the structure with the base soils, as well as the reliability and probabilistic assessment of earthquake resistance of buildings are discussed. The calculations are performed using solid and structural finite elements as well as parallel computations in cluster mode.The considered verified methods and results of calculations can be applied by designers and researchers in design, scientific and technical support of design and construction in seismic areas, as well as in updating of normative documents in the field of earthquake-resistant construction. The book may serve as a manual for undergraduate and graduate students of universities of civil engineering.

Soil-structure interaction (SSI) is an important phenomenon in the seismic response analysis. As seismologists describe seismic excitation in terms of the seismic motion of certain control point at the free surface of the initial site, the question is whether the same point of the structure (after structure appears) will have the same seismic response motion in case of the same seismic event. If yes, then seismic motion from seismologists is directly applied to the base of the structure (it is called ''fixed-base analysis''), and they say that ''no SSI occurs'' (though literally speaking soil is forcing structure to move, so interaction is always present). This is a conventional approach in the field of civil engineering. However, if heavy and rigid structure (sometimes embedded) is erected on medium or soft soil site, this structure changes the seismic response motion of the soil as compared to the initial free-field picture. Such a situation is typical for Nuclear Power Plants (NPPs), deeply embedded structures, etc. The book describes different approaches to SSI analysis and different SSI effects. Special attention is paid to the Combined Asymptotic Method (CAM) developed by the author and used for the design of NPPs in seismic regions. Nowadays, some civil structures have parameters comparable to those of NPPs (e.g., masses and embedment), so these approaches become useful for the civil structural engineers as well.

Soil-structure interaction (SSI) is an important phenomenon in the seismic response analysis. As seismologists describe seismic excitation in terms of the seismic motion of certain control point at the free surface of the initial site, the question is whether the same point of the structure (after structure appears) will have the same seismic response motion in case of the same seismic event.If yes, then seismic motion from seismologists is directly applied to the base of the structure (it is called ''fixed-base analysis''), and they say that ''no SSI occurs'' (though literally speaking soil is forcing structure to move, so interaction is always present). This is a conventional approach in the field of civil engineering. However, if heavy and rigid structure (sometimes embedded) is erected on medium or soft soil site, this structure changes the seismic response motion of the soil as compared to the initial free-field picture.Such a situation is typical for Nuclear Power Plants (NPPs), deeply embedded structures, etc. The book describes different approaches to SSI analysis and different SSI effects. Special attention is paid to the Combined Asymptotic Method (CAM) developed by the author and used for the design of NPPs in seismic regions. Nowadays, some civil structures have parameters comparable to those of NPPs (e.g., masses and embedment), so these approaches become useful for the civil structural engineers as well.

The book discusses some topics of modern structural mechanics, which, as experience shows, are not sufficiently studied at the universities. It has been written to provide an in-depth presentation of the fundamentals of the methods used in the design software, with a focus on analyzing basic assumptions and explaining the physical meaning of computational operations. This book is not intended for students who have just begun to study structural mechanics; it is aimed at structural engineers who want to further enhance their theoretical training. It can also be recommended to graduate and post-graduate students of construction universities.