1.4 Sabetta & Pugliese (1996)

1) Reference

Fabio Sabetta and Antonio Pugliese, 1996, estimation of Response Spectra and Simulation of Nonstationary Earthquake Ground Motions, Bull. Seism. Soc. Am., Vol. 86, No. 2, 337-352.

 

2) Estimated physical parameter

- Peak ground acceleration (Horizontal, Vertical)

- Peak ground velocity (Horizontal, Vertical)

- Velocity response spectra (h=5%, T=0.04 to 4 sec) (Horizontal, Vertical)

 

3) Used strong motion data

- Area: Italy

- Type of earthquake: Not defined

- Period: 1940 – 1992 years

- Number of events: 17

- Number of records: 95

- Magnitude: 4.6 – 6.8

- Epicentral distance: 1.5 – 110 km

 

4) Style of faulting

Not specified

 

5) Ground condition

(a) Stiff

(b) Shallow Alluvium (H20m)

(c) Deep Alluvium (H>20m)

              H : Thickness of alluvium soil layer

 

6) Definition of magnitude

Magnitude corresponds to the surface-wave magnitude (Ms) when both local magnitude (ML) and Ms are greater than or equal to 5.5 and corresponds to ML when magnitude is lower than this value.

 

7) Definition of source distance

- Epicentral distance and

- Shortest distance between the recording station and the surface projection of the fault plane

 

 

8) Definition of horizontal component

Larger of the two horizontal components of the motion

 

9) Applicability written in the paper

The equations are applicable to predict motions at distances smaller than 100 km and magnitudes ranging from 4.6 to 6.8.

 

10) Empirical attenuation formula

Table 1.4.1  Coefficients for velocity response spectra, PGA and PGV for horizontal component and fault distance

Freq.

Const. Term

Mag. Coeff.

Dist. Coeff.

Site Coeff.

Site Coeff.

(Hz)

a

b

c

e1

e2

h

s

5% damped PSV (cm/sec)

0.25

raw

-2.320

0.653

-1

0

0.134

2.3

0.275

 

smooth

-2.400

0.685

-1

0

0.130

2.1

0.297

 

0.33

raw

-2.017

0.637

-1

0

0.149

2.3

0.317

 

 

smooth

-2.170

0.675

-1

0

0.151

2.5

0.297

 

0.50

raw

-1.935

0.667

-1

0

0.194

3.1

0.300

 

 

smooth

-1.800

0.650

-1

0

0.184

3.1

0.297

 

0.67

raw

-1.498

0.614

-1

0

0.200

4.0

0.242

 

 

smooth

-1.510

0.620

-1

0.010

0.210

3.5

0.295

 

1.00

raw

-1.112

0.560

-1

0

0.242

4.2

0.246

 

 

smooth

-1.120

0.570

-1

0.050

0.242

4.0

0.290

 

1.33

raw

-0.753

0.503

-1

0.120

0.232

4.9

0.261

 

 

smooth

-0.850

0.530

-1

0.120

0.232

4.4

0.283

 

2.00

raw

-0.496

0.458

-1

0.240

0.156

4.6

0.279

 

 

smooth

-0.400

0.455

-1

0.220

0.156

5.0

0.271

 

2.50

raw

-0.077

0.397

-1

0.196

0

4.9

0.268

 

 

smooth

-0.077

0.400

-1

0.210

0.115

5.3

0.264

 

3.33

raw

0.467

0.301

-1

0.122

0

6.1

0.245

 

 

smooth

0.400

0.315

-1

0.165

0.065

5.7

0.245

 

5.00

raw

0.489

0.283

-1

0.103

0

5.7

0.215

 

 

smooth

0.550

0.273

-1

0.130

0

6.3

0.215

 

6.67

raw

0.499

0.255

-1

0.135

0

6.5

0.207

 

 

smooth

0.500

0.255

-1

0.130

0

6.7

0.200

 

10.00

raw

0.290

0.244

-1

0.168

0

7.3

0.200

 

 

smooth

0.290

0.245

-1

0.130

0

7.3

0.190

 

15.00

raw

-0.033

0.249

-1

0.112

0

7.2

0.181

 

 

smooth

-0.035

0.255

-1

0.130

0

7.2

0.182

 

25.00

raw

-0.505

0.275

-1

0.147

0

5.8

0.182

 

 

smooth

-0.505

0.273

-1

0.130

0

5.8

0.182

PGA (g)

-1.562

0.306

-1

0.169

0

5.8

0.173

PGV (cm/sec)

-0.710

0.455

-1

0.133

0.133

3.6

0.215

Coefficients are to be used for 4.6 £ M £ 6.8 and R £ 100km.

 

Table 1.4.2  Coefficients for velocity response spectra, PGA and PGV for horizontal component and epicentral distance

Freq.

Const. Term

Mag. Coeff.

Dist. Coeff.

Site Coeff.

Site Coeff.

(Hz)

a

b

c

e1

e2

h

s

5% damped PSV (cm/sec)

0.25

raw

-2.409

0.684

-1

0

0.111

2.7

0.303

 

smooth

-2.500

0.725

-1

0

0.100

2.6

0.319

 

0.33

raw

-2.146

0.675

-1

0

0.109

2.7

0.344

 

 

smooth

-2.250

0.715

-1

0

0.108

3.0

0.319

 

0.50

raw

-2.082

0.706

-1

0

0.157

3.4

0.320

 

 

smooth

-1.900

0.687

-1

0

0.150

3.6

0.319

 

0.67

raw

-1.647

0.654

-1

0

0.165

4.4

0.270

 

 

smooth

-1.647

0.660

-1

0.010

0.175

4.0

0.315

 

1.00

raw

-1.297

0.605

-1

0

0.209

4.2

0.271

 

 

smooth

-1.280

0.612

-1

0.050

0.208

4.4

0.308

 

1.33

raw

-1.006

0.557

-1

0.120

0.208

4.4

0.278

 

 

smooth

-1.000

0.570

-1

0.120

0.190

4.7

0.303

 

2.00

raw

-0.650

0.498

-1

0.249

0.124

5.1

0.301

 

 

smooth

-0.595

0.500

-1

0.230

0.124

5.0

0.290

 

2.50

raw

-0.281

0.442

-1

0.219

0

4.8

0.285

 

 

smooth

-0.281

0.445

-1

0.222

0.078

5.2

0.280

 

3.33

raw

0.202

0.354

-1

0.147

0

5.5

0.260

 

 

smooth

0.100

0.377

-1

0.185

0.020

5.4

0.260

 

5.00

raw

0.296

0.326

-1

0.126

0

5.8

0.238

 

 

smooth

0.296

0.323

-1

0.161

0

5.7

0.234

 

6.67

raw

0.222

0.311

-1

0.161

0

5.8

0.220

 

 

smooth

0.222

0.310

-1

0.161

0

5.9

0.220

 

10.00

raw

-0.019

0.304

-1

0.194

0

6.3

0.214

 

 

smooth

-0.019

0.304

-1

0.161

0

6.2

0.208

 

15.00

raw

-0.312

0.304

-1

0.137

0

6.5

0.194

 

 

smooth

-0.312

0.304

-1

0.161

0

6.3

0.200

 

25.00

raw

-0.817

0.336

-1

0.174

0

4.7

0.195

 

 

smooth

-0.817

0.330

-1

0.161

0

4.7

0.195

PGA (g)

-1.845

0.363

-1

0.195

0

5.0

0.190

PGV (cm/sec)

-0.828

0.489

-1

0.116

0.116

3.9

0.249

Coefficients are to be used for 4.6 £ M £ 6.8 and R £ 100km.

 

Table 1.4.3  Coefficients for velocity response spectra, PGA and PGV for vertical component and fault distance

Freq.

Const. Term

Mag. Coeff.

Dist. Coeff.

Site Coeff.

Site Coeff.

 

(Hz)

 

a

b

c

e1

e2

h

s

5% damped PSV (cm/sec)

0.25

raw

-2.395

0.621

-1

0

0

2.8

0.300

 

smooth

-2.395

0.629

-1

0

0

2.4

0.300

 

0.33

raw

-2.162

0.605

-1

0

0

2.9

0.328

 

 

smooth

-2.292

0.636

-1

0

0

2.4

0.328

 

0.50

raw

-2.154

0.640

-1

0

0

2.6

0.351

 

 

smooth

-2.154

0.639

-1

0

0

2.5

0.351

 

0.67

raw

-1.848

0.607

-1

0

0

2.4

0.345

 

 

smooth

-1.900

0.615

-1

0

0

2.9

0.345

 

1.00

raw

-1.547

0.574

-1

0

0

3.9

0.305

 

 

smooth

-1.547

0.574

-1

0.010

0

3.9

0.305

 

1.33

raw

-1.155

0.512

-1

0

0

5.2

0.280

 

 

smooth

-1.155

0.515

-1

0.018

0

4.9

0.280

 

2.00

raw

-0.512

0.402

-1

0

0

5.1

0.254

 

 

smooth

-0.712

0.441

-1

0.040

0

5.1

0.254

 

2.50

raw

-0.523

0.397

-1

0.076

0

4.9

0.237

 

 

smooth

-0.480

0.399

-1

0.080

0

5.1

0.240

 

3.33

raw

-0.482

0.384

-1

0.174

0

4.7

0.252

 

 

smooth

-0.350

0.370

-1

0.137

0

5.1

0.232

 

5.00

raw

-0.135

0.314

-1

0.171

0

5.1

0.252

 

 

smooth

-0.130

0.320

-1

0.173

0

5.1

0.225

 

6.67

raw

-0.323

0.333

-1

0.153

0

5.7

0.221

 

 

smooth

-0.323

0.337

-1

0.185

0

4.7

0.221

 

10.00

raw

-0.841

0.384

-1

0.192

0

2.9

0.215

 

 

smooth

-0.700

0.370

-1

0.205

0

3.8

0.215

 

15.00

raw

-1.101

0.378

-1

0.231

0

2.0

0.206

 

 

smooth

-1.000

0.380

-1

0.220

0

3.0

0.210

 

25.00

raw

-1.411

0.375

-1

0.235

0

2.0

0.212

 

smooth

-1.411

0.385

-1

0.230

0

2.2

0.212

PGA (g)

-2.365

0.387

-1

0.182

0

4.9

0.181

PGV (cm/sec)

-1.359

0.525

-1

0

0

4.9

0.212

Coefficients are to be used for 4.6 £ M £ 6.8 and R £ 100km.

 

Table 1.4.4  Coefficients for velocity response spectra, PGA and PGV for vertical component and epicentral distance

Freq.

Const. Term

Mag. Coeff.

Dist. Coeff.

Site Coeff.

Site Coeff.

 

(Hz)

 

a

b

c

e1

e2

h

s

5% damped PSV (cm/sec)

0.25

raw

-2.507

0.652

-1

0

0

3.1

0.320

 

smooth

-2.507

0.660

-1

0

0

2.2

0.320

 

0.33

raw

-2.275

0.637

-1

0

0

3.2

0.346

 

 

smooth

-2.400

0.670

-1

0

0

2.5

0.346

 

0.50

raw

-2.294

0.676

-1

0

0

2.5

0.362

 

 

smooth

-2.220

0.670

-1

0

0

2.8

0.362

 

0.67

raw

-1.946

0.637

-1

0

0

2.8

0.364

 

 

smooth

-1.960

0.645

-1

0

0

3.2

0.358

 

1.00

raw

-1.702

0.612

-1

0

0

3.9

0.313

 

 

smooth

-1.630

0.605

-1

0.010

0

4.1

0.313

 

1.33

raw

-1.336

0.554

-1

0

0

5.1

0.289

 

 

smooth

-1.336

0.560

-1

0.030

0

4.6

0.289

 

2.00

raw

-0.655

0.438

-1

0

0

5.4

0.267

 

 

smooth

-0.920

0.485

-1

0.090

0

5.0

0.267

 

2.50

raw

-0.766

0.447

-1

0.100

0

4.4

0.251

 

 

smooth

-0.750

0.453

-1

0.120

0

5.0

0.258

 

3.33

raw

-0.674

0.427

-1

0.196

0

4.7

0.263

 

 

smooth

-0.550

0.413

-1

0.155

0

5.0

0.245

 

5.00

raw

-0.322

0.356

-1

0.193

0

5.2

0.267

 

 

smooth

-0.400

0.373

-1

0.190

0

5.0

0.235

 

6.67

raw

-0.635

0.394

-1

0.181

0

4.6

0.220

 

 

smooth

-0.550

0.380

-1

0.210

0

4.5

0.230

 

10.00

raw

-1.091

0.437

-1

0.218

0

1.7

0.227

 

 

smooth

-0.950

0.411

-1

0.235

0

3.5

0.225

 

15.00

raw

-1.298

0.422

-1

0.252

0

1.0

0.221

 

 

smooth

-1.250

0.424

-1

0.252

0

2.5

0.221

 

25.00

raw

-1.626

0.423

-1

0.258

0

0.5

0.219

 

smooth

-1.626

0.428

-1

0.258

0

1.5

0.219

PGA (g)

-2.637

0.443

-1

0.209

0

4.1

0.195

PGV (cm/sec)

-1.499

0.561

-1

0

0

5.2

0.228

Coefficients are to be used for 4.6 £ M £ 6.8 and R £ 100km.