Seismic Effects on StructuresBy
- E. Juhásová, Institute of Construction and Architecture, Slovak Academy of Sciences, Bratislava, Czechoslovakia
This monograph deals with the problem of dynamic behaviour and seismic response of structures which are designed and constructed in seismic regions. Extensive attention is given to description of measuring methods, methods of evaluation of results and determination of dynamic properties of structures. The questions of linear and non-linear seismic response are solved taking into account the peculiarities of stiffness and damping and the demands of proper seismic design and the protecting of structures against unfavourable seismic effects. There is detailed analysis of torsional sesimic effects on structures with asymmetrical disposition in plan, of the influence of higher axial forces on the seismic response and of the problems of soil-structure interaction. The experimental results are extensively documented, with graphs, tables, photographs and a keyword index.
This volume will interest structural engineers, engineers-designers, geophysicists, mechanical and geotechnical engineers. It is intended to serve both readers already acquainted with problems of earthquake engineering and beginners in this field.
Developments in Geotechnical Engineering
Published: August 1991
- Preface. List of symbols. 1. Characteristics of Seismic Effects. Causes of an earthquake and theory of its mechanism. Evaluation of methods of random seismic motions. The methods of numerical solution of spectral characteristics of seismic effects. Spectral characteristics of weak earthquakes and microvibrations of soil. Synthetic seismic accelerograms. Design seismic spectra. 2. Dynamic Properties of Full Scale Structures. Dynamic measurements on structures in situ. Measuring instruments and devices. The methods of analysis of measured data. Experimental dynamic properties of structures. Formulation of dynamic calculation models. Calculation methods for the solution of natural frequencies and modes of vibration of discrete systems. Empirical relations for determining the first natural frequencies of buildings. 3. Methods of Solution of the Seismic Response of Structures. The theory of motion of a building under the seismic loading. The numerical solution of the seismic response of a structure. Seismic response of the guyed TV mast. 4. Some Problems of the Seismic Response of More Complicated Structures. Structures with an asymmetrical layout of vertical supporting elements. The effect of axial forces in columns of structures with soft storeys. Soil -structure interaction; essential problems. 5. The Non-Linear Seismic Response of Structures. The elasto-plastic reserve of structures and hysteretic calculation models. Non-linear seismic response spectra. The non-linear seismic response of frame systems. Laboratory seismic testing. 6. Design Requirements of Structures in Seismic Regions. Basic structural principles of seismic design. Protection of structures against extreme effects of seismic motions. Conclusion. References. Subject Index.