1.1 seismic precautionary intensity

The seismic intensity approved as the basis for seismic fortification of a region in accordance with the authority prescribed by the state. In general, the seismic intensity with a probability of exceeding 10% within 50 years is taken.

1.2 Seismic precautionary criterion

The scale for measuring seismic fortification requirements is determined by the seismic fortification intensity or design ground motion parameters and building fortification category.

1.3 earthquake action

The dynamic effects of structures caused by ground motions include horizontal and vertical earthquakes.

1.4 building mechanical and electrical equipment engineering facilities

Auxiliary machinery, electrical construction, components and systems that serve the building use functions. It mainly includes elevators, lighting systems and emergency power supplies, communication equipment, plumbing systems, heating and air conditioning systems, fire alarm and fire fighting systems, and shared antennas.

1.5 seismic support

A component composed of anchor solids, reinforced booms, diagonal braces and seismic connection components.

1.6 seismic bracing

It is firmly connected with the building structure and uses seismic force as the seismic support facility for the load. It is composed of anchors, reinforced booms, seismic connection members and seismic braces.

1.7 Lateral seismic bracing

Seismic support and hanger with diagonal brace parallel to the pipe cross section.

1.8 Longitudinal seismic bracing

Seismic support and hanger with diagonal brace perpendicular to the pipe cross section.

1.9 Single tube (rod) seismic bracing single tube seismic bracing

An earthquake-resistant support and hanger composed of a load-bearing hanger and an earthquake-resistant diagonal brace.

1.10 door-shaped seismic bracing door-shaped seismic bracing

There are two or more load-bearing hangers, beams, and seismic braces composed of seismic supports and hangers.

1.11 Design basic acceleration of ground motion

The design value of the seismic acceleration with a probability of exceeding 10% during the 50-year design base period.

1.12 Design characteristic period of ground motion

The seismic influence coefficient curve used for seismic design reflects the period value corresponding to the starting point of the descending section of factors such as earthquake magnitude, epicenter distance, and site category.