URBAN EARTHQUAKE RAPID RESPONSE AND EARLY WARNING SYSTEMS [复制链接]

Technological advances in seismic instrumentation and telecommunication permit the implementation }eU*( }<^  
of real-time rapid response and early warning systems. During large earthquakes, such systems are ~ 'cmSiz-  
capable of providing from a few seconds to a few tens of seconds of warning before the arrival of %lhEM}Sm  
strong ground shaking and enable quick reports about the damage estimates to determine where }'V5/>m[  
emergency response is most needed. An earthquake early warning and rapid response system can \ZFGw&yN  
provide the critical information needed to minimize loss of lives and property, and to direct rescue [PM2\#K  
operations As part of the preparations for the future earthquake in Istanbul a Rapid Response and Early KP^V>9q  
Warning system in the metropolitan area is in operation. For the Early Warning system ten strong Qj.#)
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motion stations were installed as close as possible to the fault zone. Continuous on-line data from these `2WFk8) F  
stations via digital radio modem provide early warning for potentially disastrous earthquakes. %nZo4hnr$r  
Considering the complexity of fault rupture and the short fault distances involved, a simple and robust "Yv_B3p   
Early Warning algorithm, based on the exceedance of specified threshold time domain amplitude E0=)HTtS  
levels is implemented. The encrypted early warning signals will be communicated to the respective .V/Rfq  
end users through a “service provider” company. The users of the early warning signal will be power ,eW%{[g(  
and gas companies, nuclear research facilities, critical chemical factories, subway system and several ::lKL  
high-rise buildings. Depending on the location of the earthquake (initiation of fault rupture) and the Z
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recipient facility the alarm time can be as high as about 8s. For the rapid response system one hundred wu!59pL  
18 bit-resolution strong motion accelerometers were placed in quasi-free field locations (basement of 286;=rN]*  
small buildings) in the populated areas of the city, within an area of approximately 50x30km, to r'r%w#=`t  
constitute a network that will enable early damage assessment and rapid response information after a L#?Ek-  
damaging earthquake. Early response information is achieved through fast acquisition and analysis of jXx<`I+]  
processed data obtained from the network. A shake map and damage distribution map (using aggregate h8S.x)  
building inventories and fragility curves) will be automatically generated using the algorithm Yui3+}Ms  
developed for this purpose. The shake and damage maps will be conveyed to the governor’s and nwe*BVp  
mayor’s offices, fire, police and army headquarters within 3 minutes using radio modem and GPRS rQs)O<jl  
communication