| Abstrakt: |
Abstract: a1_The SEJS-NET system is based on Internet technology and is designed for monitoring of strong ground motion and building vibration. The system, making use of present feasibilities of telecommunication, conducts automatically, practically without maintenance, recording of seismic vibrations at any number of measurement points. The access through a WWW browser to a recording database, equipment with handy and flexible functions for visualization, selecting, editing, and maintained in the Measurement Central Base - the system’s server, is independent of mutual location of Recording Stations, the Central Base and user’s workstation. Thanks to implemented solution, SEJS-NET system, supporting routine processing of collected data, builds at the same time a simple and flexible basis for advanced processing. Designers of sophisticated measuring systems try to use high telecommunication technology, which gives possibility to make easier controlling of measurement process and data distribution. The work presents practical application of WAP technology in SEJS-NET system. Implemented WMOBILE module gives access to system resources via WAP browser from mobile phones and palmtop browsers. Anti-earthquake design of facilities with high earthquake risk is based on design spectra, which are prescribed on the basis of earthquake hazard to a building site in question. In the Czech Republic, the determination of earthquake hazard, expressed in the units of ground motion acceleration, makes use of acceleration attenuation relations, which had been derived in abroad regions with greater seismic activities. Verification the applicability of abroad formulae must be based on authentic accelerograms of earthquake events in the region of localities in the Czech Republic. Since 2003, four temporarily seismic stations are taken in operation in the N-S profile Šonov - Znojmo towns. |
