1.30 Zhao et al. (2006)

1)      Reference

John X Zhao, Jian Zhang, Akihiro Asano, Yuki Ohno, Taishi Oouchi, Toshimasa Takahashi, Hiroshi Ogawa, Kojiro Irikura, Hong K Thio, Paul Somerville, Yasuhiro Fukushima and yoshimitsu Fukushima, 2006, Attenuation Relations of Strong Ground motion in Japan Using Site Classification Based on Predominant Period, Bulletin of Seismological Society of America, Vol. 96, No. 3, 898-913.

 

2)      Estimated physical parameter

- Peak ground acceleration (Horizontal)

- Acceleration response spectrum (h=5%, T=0.05 to 5.0 sec) (Horizontal)

 

3)      Used strong motion data

- Area: Japan, Iran, and Western USA

- Type of earthquake: Crustal, Interface, Slab

- Period: -2003 years

- Number of events: Japan 249, Iran and Western USA 20

- Number of records: Japan 4518, Iran and Western USA 208

- Magnitude:

- Epicentral distance:

 

4)      Style of faulting

(a)   Reverse

(b)   Strike-slip

(c)    Normal

 

5)      Ground condition

(a)   Rock

(b)   Hard soil

(c)    Medium soil

(d)   Soft soil

 

6)      Definition of magnitude

Moment magnitude

 

7)      Definition of source distance

Shortest distance to the rupture zone for earthquakes with available fault models, and hypocentral distance for the other events.

 

8)      Definition of horizontal components

Geometric mean of two horizontal components

 

9)      Applicability written in the paper

Depth < 120km

 

10)  Empirical attenuation formula

y: PGA (cm/s2) or 5% damped acceleration response spectrum (cm/s2)

              Mw: moment magnitude

              x: source distance (km)

              h: focal depth (km)

              FR: crustal events with a reverse-faulting mechanism and is zero for all other events

              SI: interface events and is zero for all other events

              SS: subduction slab events and is zero for all other events

              SSL: magnitude-independent path modification term for slab events

              Ck: site-class term,

SCⅠ : Rock

               SCⅡ : Hard soil

               SCⅢ : Medium soil

               SCⅣ : Soft soil

           hc: depth constant (=15km)

           δh: dummy variable (0 : h<hc, 1 : h≥hc)

           ξ: intra-event errors with zero mean and a standard deviation of σ

           η: inter-event errors with zero mean and a standard deviation of τ

 

[Standard Deviation]

           σT: total standard error

 

 

Table 1.30-1 Coefficients for source and path term of the models in the present study

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 1.30-2 Coefficients for site class term and prediction error