Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: wibracje sejsmiczne

Sortuj według:

Ogranicz wyniki do:

The influence of the circular distribution of radial and tangential seismic velocity on the structural safety of residential buildings

Chrzan Tadeusz

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

2022

Nr 3

48--54

The article presents the results of conditions of circular distribution of seismic vibrations generated during rock blasting. The Scales of Dynamic Influences [SWD] of the harmfulness of the vibration velocity on a two-storey building [SWDI] and a five-storey building[SWDII] are given. The value of seismic velocity safe for the construction of the buildings has been determined. They are in Zone II of the Dynamic Influence Scale [SWD] SWD I and SWD II. The magnitude of the components of the vibration velocity at the same distance from the source of vibration depends on the directional angle between the line of blast holes and the line connecting the centre of the surface of the mined rock block and the place of measurement. For the circular distribution of the vibration velocity, a theoretical analysis of the change in the radial value Vx and the tangential Vy of the vibration velocity depending on the change in the directional angle was conducted. Graphs of vibration velocity for circular distribution, measured during mining of rocks and complying with theoretical predictions were presented. For residential buildings, with SWDI and SWDII, the limit value of the safe vibration velocity for the building structures is given.

Measurements of seismic vibrations induced by quarry blasts at the Mostecka Basin

Kalab Z.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

2006

z. 271

49-58

This contribution deals with presentation of measurements of quarry blasts seismic effect that were made in the Mostecka Basin. Obtained values of this seismological measurements were used not only for evaluation of seismic loading of buildings and structures in surroundings according the Czech Technical Standard 73 0040 but also as input data for mathematical modeling. Example of wave pattern is presented because unusual shape of wave patterns was recorded. To explain the origin of the group of surface waves, several working hypotheses were tested.

W artykule przedstawiono pomiary zjawisk sejsmicznych towarzyszących urabianiu skał za pomocą materiału wybuchowego. Uzyskane, na podstawie pomiarów sejsmiczności, wyniki użyte zostały nie tylko do określenia sejsmicznego obciążenia budynków i konstrukcji w rejonie wstrząsów według Czeskich Standardów Technicznych nr 73 0040, ale także jako dane do modelowania matematycznego. W artykule przedstawiono przebiegi zarejestrowanych drgań i przeprowadzono próbę wyjaśnienia wpływu źródła wstrząsu na przebieg fal powierzchniowych.