Houses built in the main urban area after the 1980s are all earthquake-proof at 7 degrees. Generally speaking, these houses can withstand a magnitude 7 earthquake, and even if a magnitude 7 earthquake occurs, the houses will not be damaged, cracked or collapsed. Except for the houses built before 1980s without seismic fortification measures and a few old houses left over from history, the houses in the whole city are basically intact, all of which have the ability to resist earthquakes of magnitude 7.

Seismic design of buildings refers to buildings that must be designed in areas with seismic fortification intensity of 6 degrees or above.

Earthquake zoning is the division of earthquake regions according to the possibility of earthquake damage and the size of strong ground motion parameters. Seismic safety evaluation refers to the study of seismic geology, geophysics, seismic activity and topographic deformation around a specific construction project area or site, and scientifically gives the seismic parameters and basic data needed for the corresponding project planning and design according to the risk probability grade that should be adopted in the project by using the seismic risk probability analysis method. The results of seismic safety evaluation can be used as the seismic fortification requirements of this specific construction project.

Major projects and lifeline projects have great earthquake damage and serious losses, sometimes leading to paralysis of urban functions. Therefore, compared with the general building structure, it is required to improve the corresponding seismic fortification requirements for major projects and lifeline projects.

Make buildings earthquake-resistant: Earthquake disasters are mainly caused by the destruction of engineering structures. Therefore, strengthening the seismic fortification of engineering structures and improving the seismic capacity of existing engineering structures is one of the important measures to reduce earthquake disasters.

Construction projects must be designed in accordance with the seismic fortification requirements and seismic design specifications, and the construction shall be carried out in accordance with the seismic design. The seismic design shall be carried out according to the fortification requirements and specifications, and the construction shall be carried out according to the design. Seismic design and construction are important measures to reduce earthquake disasters. Good seismic design should consider the following principles as far as possible: (1) Choose hard ground; The structure should be uniform and regular; Improve the strength and ductility of structures and components; Design multiple seismic defense lines; Prevent brittleness and instability.

Seismic appraisal and reinforcement of existing engineering structures: due to different construction years, different design codes and different structural forms, the seismic capacity of existing engineering structures is quite different. Especially for structures with a long history, seismic fortification is often ignored, and seismic appraisal should be carried out to strengthen the weak links and improve the seismic capacity.

Shock absorption and isolation technology of engineering structures: buildings will be destroyed when they are attacked by seismic waves. Using isolation technology to reduce the impact of seismic waves on buildings is a new method to effectively defend against earthquakes. For example, using special rubber, multi-layer lead cores and steel cores to make building support pads can achieve the effects of isolation, energy consumption and buffering earthquake energy.