1.8 Ambraseys et al. (1996)

1) Reference

N. N. Ambraseys, K. A. Simpson and J. J. Bommer, 1996, Prediction of Horizontal Response Spectra in Eurpope, Earthquake Engineering and Structural Dynamics, Vol. 25, 371-400.

2) Estimated physical parameter

- Acceleration response spectra (h=5%, T=0.1 to 2 sec) (Horizontal)

3) Used strong motion data

- Area: Europe and adjacent regions

- Type of earthquake: shallow earthquakes (h < 30km)

- Period: 1972 – 1994 years

- Number of events: 157

- Number of records: 422 components

- Magnitude: 4.0 – 7.9

- Epicentral distance: 0 – 212 km

4) Style of faulting

Not specified

5) Ground condition

(a) Rock (Vs > 750m/sec)

(b) Stiff Soil (Vs = 360–750 m/sec)

(c) Soft Soil (Vs = 180–360 m/sec)

Vs : averaged S-wave velocity over the upper 30 m of the site

6) Definition of magnitude

Surface wave magnitude

7) Definition of source distance

Large event: Closest distance to the projection of the fault rupture

Small event: Epicentral distance

8) Definition of horizontal component

Larger of the two horizontal components of the motion

9) Applicability written in the paper

Not specified.

10) Empirical attenuation formula

Table 1.8.1 Coefficients for spectral ordinates

T	C'1	C2	h0	C4	CA	CS	s
0.10	-0.84	0.219	4.5	-0.954	0.078	0.027	0.27
0.11	-0.86	0.221	4.5	-0.945	0.098	0.036	0.27
0.12	-0.87	0.231	4.7	-0.960	0.111	0.052	0.27
0.13	-0.87	0.238	5.3	-0.981	0.131	0.068	0.27
0.14	-0.94	0.244	4.9	-0.955	0.136	0.077	0.27
0.15	-0.98	0.247	4.7	-0.938	0.143	0.085	0.27
0.16	-1.05	0.252	4.4	-0.907	0.152	0.101	0.27
0.17	-1.08	0.258	4.3	-0.896	0.140	0.102	0.27
0.18	-1.13	0.268	4.0	-0.901	0.129	0.107	0.27
0.19	-1.19	0.278	3.9	-0.907	0.133	0.130	0.28
0.20	-1.21	0.284	4.2	-0.922	0.135	0.142	0.27
0.22	-1.28	0.295	4.1	-0.911	0.120	0.143	0.28
0.24	-1.37	0.308	3.9	-0.916	0.124	0.155	0.28
0.26	-1.40	0.318	4.3	-0.942	0.134	0.163	0.28
0.28	-1.46	0.326	4.4	-0.946	0.134	0.158	0.29
0.30	-1.55	0.338	4.2	-0.933	0.133	0.148	0.30
0.32	-1.63	0.349	4.2	-0.932	0.125	0.161	0.31
0.34	-1.65	0.351	4.4	-0.939	0.118	0.163	0.31
0.36	-1.69	0.354	4.5	-0.936	0.124	0.160	0.31
0.38	-1.82	0.364	3.9	-0.900	0.132	0.164	0.31
0.40	-1.94	0.377	3.6	-0.888	0.139	0.172	0.31
0.42	-1.99	0.384	3.7	-0.897	0.147	0.180	0.32
0.44	-2.05	0.393	3.9	-0.908	0.153	0.187	0.32
0.46	-2.11	0.401	3.7	-0.911	0.149	0.191	0.32
0.48	-2.17	0.410	3.5	-0.920	0.150	0.197	0.32
0.50	-2.25	0.420	3.3	-0.913	0.147	0.201	0.32
0.55	-2.38	0.434	3.1	-0.911	0.134	0.203	0.32
0.60	-2.49	0.438	2.5	-0.881	0.124	0.212	0.32
0.65	-2.58	0.451	2.8	-0.901	0.122	0.215	0.32
0.70	-2.67	0.463	3.1	-0.914	0.116	0.214	0.33
0.75	-2.75	0.477	3.5	-0.942	0.113	0.212	0.32
0.80	-2.86	0.485	3.7	-0.925	0.127	0.218	0.32
0.85	-2.93	0.492	3.9	-0.920	0.124	0.218	0.32
0.90	-3.03	0.502	4.0	-0.920	0.124	0.225	0.32
0.95	-3.10	0.503	4.0	-0.892	0.121	0.217	0.32
1.00	-3.17	0.508	4.3	-0.885	0.128	0.219	0.32
1.10	-3.30	0.513	4.0	-0.857	0.123	0.206	0.32
1.20	-3.38	0.513	3.6	-0.851	0.128	0.214	0.31
1.30	-3.43	0.514	3.6	-0.848	0.115	0.200	0.31
1.40	-3.52	0.522	3.4	-0.839	0.109	0.197	0.31
1.50	-3.61	0.524	3.0	-0.817	0.109	0.204	0.31
1.60	-3.68	0.520	2.5	-0.781	0.108	0.206	0.31
1.70	-3.74	0.517	2.5	-0.759	0.105	0.206	0.31
1.80	-3.79	0.514	2.4	-0.730	0.104	0.204	0.32
1.90	-3.80	0.508	2.8	-0.724	0.103	0.194	0.32
2.00	-3.79	0.503	3.2	-0.728	0.101	0.182	0.32