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ssociation for Ukrainian
Earthquake Engineering

Automation of design
on earthquake resistance (PRIS 95)

After-effects of the recent earthquakes insistently bring us to the necessity of the perfection of the calculation methods. Complexity of modern models of impact and structure practically excludes traditional approaches based on simple analytic methods and hand calculation. However, the complicated digit algorithms demand automation of calculation, which absence hamper the use available to all design engineers.

Created on the theoretical and experimental research of many years decompositional algorithms and effect models enable:
- to reduce the time necessary for calculations on earthquake resistance up to three orders;
- to carry out realizable non-linear and many-factor analysis of the engineering objects on personal computers of the middle class;
- to take into account the redistribution of seismic loads between vertical elements of the building at the expense of rotation and deformations of horizontal floors in their planes;
- to avoid paradoxes which exist in contemporary design codes for calculation of the conformity of building models and seismic effects (consideration of unevenness of oscillation field of soil caused by an earthquake and filtration of seismic waves according to their lengths).

PROGRAM COMPLEX PRIS 95 is designed for automation of complicated static and dynamic calculations (statics, seismicity, wind influence, combination of loads for calculations, cross-sections of constructions of reinforced concrete, etc.) buildings and structures of different purpose (civil, industrial, transport, hydrotechnic and others). It realizes both of the already classic method of the finite elements and the original numeral-analytic methods allowing to simplify three-dimensional models of the building and structures and to considerably lower the order of solving equation systems what especially matters in carrying-out of dynamic (seismic) calculations.

for engineers of planning organizations for carrying-out of strength calculations and automated design of constructions to be widely adopted;
for specialists, engaged in detailed numeric investigations and the development of substantially new codes and design of the most important structures and buildings under complex seismic, climatic, geologic, etc. conditions;
for lecturers of subjects "Structural Mechanics", SPR, "Engineering Constructions" in colleges and universities.

Significant advantage of the program complex is the possibility
- of simplified specification of the input data and visual demonstration of the calculation results in combination with high speed analysis ;
- to get classic normative solutions (continuity of algorithms) in a particular case;
- to correct quickly projects of earthquake resistant buildings as applied to the codes of different countries (CIS, USA, Europe, etc.) using three-dimensional models;
- to make use of the complex in the development of substantially new codes by taking into account configurations of buildings on their earthquake resistance;
- to conduct urgent analysis of earthquake after-effects (normalization of coefficients of reliability for buildings of different constructional schemes);
- to carry out multivariant calculations with the purpose of formation of the most disadvantageous variant of seismic loads for specific conditions;
- estimation of seismic risk by insurance companies;
- use of the complex by developers of large integrated systems.