scholarly journals Short-Period Seismic Wave Radiation Area and Magnitude of the 1914 Akita-Senboku Earthquake Inferred from Seismic Intensity Data by Comparison with the 1896 Rikuu Earthquake

2011 ◽  
Vol 63 (4) ◽  
pp. 207-221
Author(s):  
Katsuhisa KANDA ◽  
Masayuki TAKEMURA
Keyword(s):  
Seismic Wave ◽  
Seismic Intensity ◽  
Wave Radiation ◽  
Intensity Data ◽  
Short Period ◽  
Radiation Area

scholarly journals Seismic Response of a Bridge Pile Foundation during a Shaking Table Test

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Yunxiu Dong ◽  
Zhongju Feng ◽  
Jingbin He ◽  
Huiyun Chen ◽  
Guan Jiang ◽  
...  
Keyword(s):  
Seismic Wave ◽  
Pile Foundation ◽  
Large Scale ◽  
Amplification Factor ◽  
Shaking Table Test ◽  
Seismic Intensity ◽  
Shaking Table ◽  
Acceleration Amplification ◽  
Bedrock Surface ◽  
Bridge Pile Foundation

Puqian Bridge is located in a quake-prone area in an 8-degree seismic fortification intensity zone, and the design of the peak ground motion is the highest grade worldwide. Nevertheless, the seismic design of the pile foundation has not been evaluated with regard to earthquake damage and the seismic issues of the pile foundation are particularly noticeable. We conducted a large-scale shaking table test (STT) to determine the dynamic characteristic of the bridge pile foundation. An artificial mass model was used to determine the mechanism of the bridge pile-soil interaction, and the peak ground acceleration range of 0.15 g–0.60 g (g is gravity acceleration) was selected as the input seismic intensity. The results indicated that the peak acceleration decreased from the top to the bottom of the bridge pile and the acceleration amplification factor decreased with the increase in seismic intensity. When the seismic intensity is greater than 0.50 g, the acceleration amplification factor at the top of the pile stabilizes at 1.32. The bedrock surface had a relatively small influence on the amplification of the seismic wave, whereas the overburden had a marked influence on the amplification of the seismic wave and filtering effect. Damage to the pile foundation was observed at 0.50 g seismic intensity. When the seismic intensity was greater than 0.50 g, the fundamental frequency of the pile foundation decreased slowly and tended to stabilize at 0.87 Hz. The bending moment was larger at the junction of the pile and cap, the soft-hard soil interface, and the bedrock surface, where cracks easily occurred. These positions should be focused on during the design of pile foundations in meizoseismal areas.

Locations and magnitudes of earthquakes in Central Asia from seismic intensity data

2013 ◽  
Vol 18 (1) ◽  
pp. 1-21 ◽  
Author(s):  
D. Bindi ◽  
S. Parolai ◽  
A. Gómez-Capera ◽  
M. Locati ◽  
Z. Kalmetyeva ◽  
...  
Keyword(s):  
Central Asia ◽  
Seismic Intensity ◽  
Intensity Data
Sign in / Sign up

Export Citation Format

Share Document