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Seismic fortification intensity according to Chinese standards

There are three main options for seismic fortification intensity according to the Chinese standards. Horizontal seismic acceleration coefficient K_h and seismic angle θ are determined according to what option is selected for seismic fortification intensity.

• 7 degrees (0.1g), 7 degrees (0.15g), 8 degrees (0.2g), 8 degrees (0.3g), 9 degrees (0.4g): K_h and seismic angel s are determined according to corresponding seismic fortification intensity based on standards.
• user-defined - input K_h: K_h is input by the user and θ is determined by (Art. 4.9.1 from SL 203-97)

• user-defined - input K_h, θ: K_h and θ are both input by the user.

Note: Third option is only valid for JTJ 004-89 and JTS 146-2012.

Values of K_h and θ according to corresponding seismic fortification intensity are given by the following tables:

For JTJ 004-89 (Tbl. 1.0.7 and Tbl. 3.1.6 from JTJ 004-89)

Note: 7 degree (0.15g) and 8 degree (0.30g) are not from JTJ 004-89, because there are no value for these two situations in JTJ 004-89. They are from JTS 146-2012.

For JTS 146-2012 (Tbl. 5.3.1 from JTS 146-2012)

For SL 203-97 (Tbl. 4.3.1 from SL 203-97)