1.0.2 The purpose is to control the earthquake damage to such important mechanical and electrical equipment as fire-fighting system, emergency communication system, power backup system, and gas supply system within the local scale, and to avoid secondary disaster.
1.0.4 This clause is mandatory. In the current national standard GB 50011-2010 Code for Seismic Design of Buildings, Clause 1.0.2 "Seismic design must be carried out for the buildings in regions with the seismic precautionary intensity being 6 or above" and Clause 3.7.1 "The connection of structural components, including the nonstructural components and the auxiliary mechanical and electrical components of buildings, and the connection between the nonstructural component and the main structure shall be subject to seismic design." are mandatory. Therefore, this clause is taken as mandatory requirement, so that the mechanical and electrical equipment of building keeps consistent with the building.
The seismic design for mechanical and electrical equipment of building shall include seismic action calculation, seismic checking for sections of the support, connectors or anchors, as well as the corresponding seismic measures employed according to this code, but the seismic design of equipment is not included.
1.0.5 The common Category A and Category B buildings are sorted out according to the current national standard GB 50223 Standard for Classification of Seismic Protection of Buildings, basically, the remaining buildings may be subject to seismic fortification according to Category C buildings. The seismic fortification categories of buildings shall be classified into Category A, Category B, Category C, and Category D, based on the importance of the service functions.
Category A buildings are those of great significance and possibly causing severe secondary disasters in earthquake; Category B buildings are those with service functions not interruptible or to be recovered as soon as possible in earthquake; Category C buildings are those not belonging to Category A, Category B or Category D; Category D buildings are secondary earthquake-resistant buildings. Category A buildings causes enormous social impact or economic loss after seismic damage. Severe secondary disasters refer to those possibly causing flood, fire, explosion, leakage of toxic or strongly corrosive substances, or other severe secondary disasters after seismic damage. Category B buildings cause great social impact or economic losses after seismic damage, including the significant lifeline engineering in a city, multi-storey large public buildings with thick stream of people, etc. The impact caused by the seismic damage to Category D buildings is inferior to Categories A, B and C buildings, and results in less social impact and economic loss. In general, they are single-storey warehouses storing low-value articles, with less personnel activity frequency, and causing no secondary disasters.
All seismic measures and seismic checking must be carried out for the mechanical and electrical equipment of Category A buildings in Intensity 6 region and buildings in Intensity 7~9 region. For the mechanical and electrical equipment of buildings below Category A in Intensity 6 region, the seismic measures specified in corresponding clauses shall be carried out, while the seismic checking may be omitted.
GB 50981-2014-TWSM The following standards are cited：
GB 50981-2014-TWSM Cited by the following standards：
