Issue 30

W. Changfeng et alii, Frattura ed Integrità Strutturale, 30 (2014) 486-494; DOI: 10.3221/IGF-ESIS.30.59

response of the structure (moment and curvature of the bottom section of the fixed pier and the displacement of the girder) is different from models where the friction of supports and the distribution of seismic force by the restraining devices are not considered. Results show that the analytical results and trend for the four seismic waves are basically identical and the analytical results of the seismic response for the first artificial seismic wave and Tianjin wave are shown in Fig. 7 and 8. The initial gap of the restraining devices is taken as ±10 cm .

210 212 214 216 218 220 222 224 226

Moment of the bottom section of the fixed pier

0.006

Curvature of the bottom section of the fixed pier

Model 1 Model 3 Model 5

Model 2 Model 4

0.005

Model 1 Model 3 Model 5

Model 2 Model 4

0.004

Curvature(1/m)

0.003

Moment (MN·m)

μ

μ

0.002

0

0.05

0.1

0.15

0.2

0

0.05

0.1

0.15

0.2

(a) (b) Figure 7 : Moment and curvature of the bottom section of the fixed pier under the first artificial seismic wave.

0.004

40 45 50 55 60 65 70

Moment of the bottom section of the 1# pier Model 1 Model 2 Model 3 Model 4 Model 5

Curvature of the bottom section of the 1# pier Model 1 Model 2 Model 3 Model 4 Model 5

0.003

0.002

Moment (MN·m)

0.001 Curvature(1/m)

μ

μ

0.000

0

0.05

0.1

0.15

0.2

0

0.05

0.1

0.15

0.2

(a)

(b)

0.0020 0.0022 0.0024 0.0026 0.0028 0.0030 0.0032 0.0034 0.0036

211 212 213 214 215 216 217

Moment of the bottom section of the fixed pier Model 1 Model 2 model 3 Model 4 Model 5

Curvature of the bottom section of the fixed pier

Model 1 Model 3 Model 5

Model 2 Model 4

Curvature(1/m)

Moment (MN·m)

μ

0

0.05

0.1

0.15

0.2

0

0.05

0.1

0.15

0.2

μ

(c)

(d)

0.003

250

Moment of the bottom section of the 3# pier

Curvature of the bottom section of the 3# pier Model 1 Model 2 Model 3 Model 4 Model 5

200

0.002

150

Model 1 Model 3 Model 5

Model 2 Model 4

100

0.001

Curvature(1/m)

Moment (MN·m)

50

μ

0

0.000

μ

0

0.05

0.1

0.15

0.2

0

0.05

0.1

0.15

0.2

(e) (f) Figure 8 : Moment and curvature of the bottom section under Tianjin seismic wave.

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