Seismic safety and early warning management system
According to one estimate, seven million people have lost their lives due to earthquakes in the last 500 years. Each year, seismologists record about 20,000 earthquakes on earth. Experts completely agree: millions of people in the big cities of the regions of earthquake-prone world are threatened by seismic catastrophes that will occur in the near future and for which they are not sufficiently prepared.
Despite improvements in seismic prevention construction methods, thousands of people are still dying in the wake of severe earthquakes due to the collapse of buildings and horrific fires caused by exploding gas pipelines and unprotected power sources.
THE CASE IN ITALY
Italy is an entirely seismic country, but its territory is classified into zones with different hazards. Anyone building or modifying the structure of a house is required to comply with seismic standards in their area, to protect the lives of those who live there.
In order to reduce the effects of an earthquake, the State has concentrated its action on territorial classification, based on past earthquakes’ intensity and frequency, and on the application of special regulations of buildings in areas classified as seismic.
Up to 2003 the national territory was classified in three seismic categories with different forces. Ministerial Decrees issued by the Ministry of Public Works between 1981 and 1984 had classified totally 2,965 Italian municipalities on 8,102, that correspond to the 45% of the national territory, in which the 40% of the population lives.
New criteria for seismic classification were published in 2003. They are based on recent studies and processing regarding seismic dangerousness of the territory, i.e. the analysis of the likelihood that a territory may be affected, during a given time interval – generally 50 years – by an event that exceeds a given intensity or magnitude threshold.
The Order of the President of the Council of Ministers no. 3274 of 20 March 2003 was published for this purporse on the Official Gazette no. 105 of 8 May 2003. Italy’s anti-seismic regulations, alined with the most modern ones at international level, establishes technical rules according to which a building should bear minor earthquakes without serious damages, and major ones without collapsing, first of all safeguarding human lives.
The legal measure contains the main principles according to which the Regions, appointed by the State to adopt the territorial seismic classificiation (Legislative Decree no 122 of 1998 and Decree of the President of the Republic no. 380 of 2001 – “Testo Unico delle Norme per l’Edilizia”), have filled out a list of municipalities with the zone each of them belongs to, with a decreasing standard of dangerousness. The entire national territory has been classifiied according to it.
- Zona 1 – It the most dangerous area, where major earthquakes may occur.
- Zona 2 – Municipalities in this area may be affected by quite strong earthquakes.
- Zona 3 – Municipalities in this area may be subject to modest shocks.
- Zona 4 – It is the least dangerous. Municipalities of this area have a low probability of seismic damages.
Novelties introduces by the ordinance have been refined further on, thanks also to the studies carried out by the competence centres (Ingv, Reluis, Eucentre). An update of the study of dangerousness at national level (Gruppo di Lavoro, 2004), provided for by the Opcm 3274/03, was adopted with the Ordinance of President of the Council of Ministers no. 3519 of 28 April 2006.
The new study, attached to the Opcm no. 3519, supplied the Regions with an updated tool for territorial classification, introducing intervals of acceleration (ag), with a probability of exceeding the threshold equal to 10% in 50 years, to be assigned to the 4 seismic areas.
Division of the seismic areas according to the acceleration of peak on rigid ground (OPCM 3519/06)
Seismic Zone – Acceleration with probability of exceeding equal to 10% in 50 years (ag)
1 – ag >0.25
2 – 0.15 <ag≤ 0.25
3 – 0.05 <ag≤ 0.15
4 – ag ≤ 0.05
Current Technical Regulations for Buildings (Ministerial Decree of 14 January 2008), in fact, have indeed modified the role that seismic classification had for planning purposes: for each zone – and thus municipal territory – a value of peak acceleration, and consequently a spectrum of elastic response, was previously supplied to calculate seismic actions.
As of 1 July 2009, 2008 Technical Regulations for Buildings came into force: each building has its own acceleration, according to geographical coordinates of the project area and to the nominal design life of a building: the degree of core dangerousness, then, can be defined for each point of the national territory, within an area of 5 sq. metres, regardless of local administrative borders.
Seismic classification (which seismic zone a municipality belongs to) is thus useful only for planning management and territorial control by relevant boards (Region, Genio, etc.).
THE NRG-TECH SEISMIC-DEVICE® PROJECT
THE OPERATING PRINCIPLE
Earthquakes are temporary vibrations of the earth which propagate from the epicentre in every direction with waves of different length.
Every second is vital.
The temporal distance between the alarm and the actual perception of a destructive earthquake is normally a few seconds. The depth of the earthquake origin and nature of the geological formations also affect this distance.
Purchase both! Savings guaranteed!
The option to purchase and use a single system is especially of interest for condominiums, multi-family houses and skyscrapers. In fact, in this case, the purchase price can be apportioned among all the tenants or owners. Naturally, the early warning seismic signal in the event of an earthquake can also be used to bring systems and industrial machinery into safe operation conditions. Petrochemicals Polynt, the Monfalcone shipyard Monte Carlo Yachts, and the Hospital of Pistoia for example, use the system to stop the entire gas network supply.
Modern management of buildings with Seismic Device® products
An additional danger to people and the environment is created by the explosion of gas and water pipes and unprotected electrical connections. In the event of earthquakes, even service facilities in buildings such as elevators are a danger to people. The SEISMIC-DEVICE® range seismic safety and early warning management system offers a solution also in this case. In case of an earthquake, a modern energy management and control system immediately switches off the electric and electronic devices of buildings. If necessary, you can immediately stop the delivery of the gas lines (compliant to CIG guide nr. 13 + G.U. of 8.5.2003), electricity and water and “park” the elevators locking them to prevent its use (ref. to normative UNI81.77), activate fire prevention systems (rif.to Ministry guidelines of the Interior in December 2011) etc .. SEISMIC-DEVICE® products are today an indispensable component in the modern management of buildings in earthquake-prone regions. Together with an earthquake-proof building system, SEISMIC-DEVICE® products guarantee a high level of safety for buildings and their occupants.
- First earthquake early warning possible through the use of detection electronics (3-axis) and the most modern methods of analysis
- Successfully supported from a scientific point of view, tested and certified
- Individual system solutions for private, commercial/industrial customers thanks to professional planning, advanced electronics and modular design
- Objective seismic early warning activated via optical and acoustic signals (105 dB)
- Automatic safety shut-down of all electronic energy supply systems (gas, electricity, water)
- Intelligent management of buildings, or rather management of all electronic devices for electronic operation buildings in accordance with customer specifications/directives
- Independent system emergency battery (optional)
- Convincing price/performance ratio
- Advantageous costs for condominium homes thanks to the shared system
- Production in compliance with the highest quality standards
- Increased safety thanks to the possibility of redundant earthquake monitoring
SEISMIC-DEVICE® products are made according to the most modern technology and the highest quality standards. Even the choice of our partners is subject to this p erformance and quality criteria, for the benefit of our customers.
Take advantage of custom solutions made with consistent and professional design!
We are able to meet the specific needs of our customers thanks to our skilled design team and the modern electronics and modular design of our systems. Customised solutions guarantee an optimum safety package and excellent value for money.
Centralised management system for technical building installations
The seismic early warning system can also be easily integrated into an existing centralised management system for technical building installations. In this way, you can move to a safe position or however activate all electrical power supply systems/electrical and electronic devices of the buildings that function electrically, whose operation can be affected by earthquakes.
Popilation alert systems
This redundant system can also be used as an alarm system for cities or countries. In this case, it uses warning sirens for large spaces. The number of horn sirens to be utilised depends on the surface to be covered by the seismic early warning system and, naturally, also on its topography (for example, the presence of mountains and valleys, buildings, etc.).
The sirens can be connected to one another to form a network with radio control as well.