Seismic fortification intensity according to Chinese standards
There are three main kinds of option for seismic fortification intensity according Chinese standards. Horizontal seismic acceleration coefficient Kh and seismic angle θ are determined according to what option is selected for seismic fortification intensity.
- 7 degree (0.1g), 7 degree (0.15g), 8 degree (0.2g), 8 degree (0.3g), 9 degree (0.4g): Kh and seismic angel s are determined according to corresponding seismic fortification intensity based on standards.
- User defined - input Kh: Kh is inputted by the user and θ is determined by (Art. 4.9.1 from SL 203-97)
- User defined - input Kh, θ: Kh and θ are both inputted by user.
Note: Third option is only valid for JTJ 004-89 and JTS 146-2012.
Values of Kh 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)
Seismic fortification intensity | 7 degree | 8 degree | 9 degree | ||
Coefficient of horizontal seismic acceleration Kh | 0.10 | 0.15 | 0.20 | 0.30 | 0.40 |
Seismic angel θ | 1.5° | 2.3° | 3.0° | 4.5° | 6.0° |
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)
Seismic fortification intensity | 7 degree | 8 degree | 9 degree | ||
Coefficient of horizontal seismic acceleration Kh | 0.10 | 0.15 | 0.20 | 0.30 | 0.40 |
Seismic angel θ | 1.5° | 2.3° | 3.0° | 4.5° | 6.0° |
For SL 203-97 (Tbl. 4.3.1 from SL 203-97)
Seismic fortification intensity | 7 degree | 8 degree | 9 degree | ||
Coefficient of horizontal seismic acceleration Kh | 0.10 | 0.15 | 0.20 | 0.30 | 0.40 |