Chapter 1 General 1.0.1 This code is prepared for the purpose of carrying out"The Law of Construction of People's Republic of China"and "The Law of Earthquake-prevention and Disaster Mitiga- tion of People's Republic of China",and carrying out the policy of giving priority to the prevention of earthquake disasters.Sothat,when the buildings are made earthquake-fortifi- cation,the damages to buildings,loss of life and economic losses will be mitigated. The seismic fortification objective of buildings,which designed and detailed in accor- dance with the requirements of this code,as follows: When the place is subjected to frequently earthquake influence which intensity is lower than the local fortification intensity,the buildings will not be damaged or only slightly dam- aged,with continued service without repair. When the place is subjected to local fortification intensity earthquake influence,the buildings will be damaged,with continued service after ordinary repair or without repair. When the place is subjected to rarely earthquake influence which intensity is expected to higher than the local fortification intensity,the buildings will notllapse nor suffer dam age that would endanger human lives. 1.0.2 Every building,which is situated on zones of fortification intensity 6 or above, must be designed to resist the effects of earthquake motions 1.0.3 The designof scmcordinary buildings and seismically islated structures,which are sit- uated on the zone of fortification intensity 6to9,shall be in accordance with this code. When buildings are situated on zone where the fortification intensity is greater than 9, andor industry buildings with specific professional requirements,the corresponding design of these buildings shall be in accordance with special provisions.. Note:Theorficininesityhereinafer uslly reeredas"inteniFrxmpefortification in tensity6,78andis referrd as inesiy679reectively. 1.0.4 Fortification intensity of a region must be determined by documents (or maps) published by the authorized central government agency. 1.0.5 Normally,the local fortification intensity may be adopted the seismic basic intensi- ty as provided in"the China Seismic Ground Motion Parameter Zonation Map"(or the in- tensity values corresponding to the design basic seismic acceleration in this code).If cities where a seismic fortification zonation has been drawn up,the approval fortification intensity or design ground motion parameters may be adopted. 1.0.6 Seismic design based on this code shall also be coordinated with provisions specified in other current compulsory design codes concerned. 1