scholarly journals Dynamic Response of Hyperbolic Cooling Towers to Propagating Seismic Waves

1977 ◽  
Vol 43 (375) ◽  
pp. 4060-4068 ◽  
Author(s):  
Hisao KONDO
Keyword(s):  
Dynamic Response ◽  
Seismic Waves ◽  
Cooling Towers

scholarly journals Dynamic response of twin lined shells due to incident seismic waves

2014 ◽  
Vol 9 (2) ◽  
pp. 183-193 ◽  
Author(s):  
J. P. Dwivedi ◽  
V. P. Singh ◽  
Radha Krishna Lal
Keyword(s):  
Dynamic Response ◽  
Seismic Waves

scholarly journals Effects of Three-Directional Seismic Wave on Dynamic Response and Failure Behavior of High-Steep Rock Slide

2021 ◽  
Vol 12 (1) ◽  
pp. 20
Author(s):  
Ziwei Ge ◽  
Hongyan Liu
Keyword(s):  
Dynamic Response ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Vertical Direction ◽  
Failure Behavior ◽  
Rock Slide ◽  
Different Types ◽  
Process Failure ◽  
Directional Wave ◽  
East West

The landslide triggered by earthquakes can cause severe infrastructure losses or even fatalities. The high-steep rock slide is the most common type of landslide in the earthquake area. In an earthquake, the ground moves randomly in all directions, two horizontal directions (East-West (EW) direction, North-South (NS) direction) and one vertical direction (Up-Down (UD) direction). Even though extensive studies have been carried out on the earthquake-triggered landslide, the effects of each single seismic wave and the three-directional seismic waves are not considered. This study aims to evaluate the effects of different types of the seismic waves on the dynamic response and failure behavior of the high-steep rock slide. To investigate the effects of each single seismic wave and three-directional seismic wave, this study presents a numerical model with four types of seismic waves, e.g., East-West (EW) direction, North-South (NS) direction, Up-Down (UD) direction, and three-directional wave (EW_NS_UD). The numerical results revealed that the types of the seismic waves have significantly different effects on the dynamic process, failure behavior, run-out distance, velocity, and deposition of the high-steep rock slide.

Relevance of the incidence angle of the seismic waves on the dynamic response of arch dams

2016 ◽  
Vol 90 ◽  
pp. 442-453 ◽  
Author(s):  
F. García ◽  
J.J. Aznárez ◽  
L.A. Padrón ◽  
O. Maeso
Keyword(s):  
Dynamic Response ◽  
Seismic Waves ◽  
Incidence Angle ◽  
Arch Dams

The Analysis on Rigid Core Pile Composite Foundation Dynamic

2014 ◽  
Vol 638-640 ◽  
pp. 601-604
Author(s):  
Wei Yu Wang
Keyword(s):  
Dynamic Response ◽  
Field Test ◽  
Dynamic Characteristics ◽  
Seismic Waves ◽  
Peak Velocity ◽  
Composite Foundation ◽  
Test Results ◽  
Peak Acceleration ◽  
Rigid Core ◽  
Load Peak

Through studying the field test results of rigid core pile composite foundation, Analyzing dynamic characteristics and dynamic response from peak acceleration and frequency duration, peak velocity and seismic waves. The following conclusion were got: Along with the rising of the upper load, peak acceleration of rigid core pile decrease, The frequency of Rigid core pile was between 6Hz-44Hz, Peak rate in the bottom of core pile have obvious change.

scholarly journals Application of BRFP New-Type Anchor Cable Material in High Slopes against Earthquakes

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Honggang Wu ◽  
Zhixin Wu ◽  
Hao Lei ◽  
Tianwen Lai
Keyword(s):  
Dynamic Response ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Response Spectrum ◽  
Basalt Fiber ◽  
Shaking Table ◽  
Measuring Point ◽  
Reinforced Plastics ◽  
Short Period ◽  
The Impact

To clarify the feasibility of BFRP (basalt fiber reinforced plastics) anchors instead of steel anchors in the seismic application of slopes under different vibration strengths, a series of shaking table tests were carried out to strengthen the slope using BFRP anchors and steel anchors, respectively. By studying the dynamic response recorded in the slope model and the observed experimental phenomena, the acceleration dynamic response and displacement spectrum dynamic response of the two slope models were analyzed. The test results show that the deformation stage of the slope reinforced by the two types of anchors is basically the same during the test, that is, elastic, plastic (potential sliding surface and plastic strengthening), and failure stages, respectively. The slope is in the elastic stage before the 0.2 g seismic wave, and it gradually enters the plastic stage after the 0.4 g seismic wave. However, the peak acceleration and displacement of the slope reinforced by steel anchors are greater than those of the slope reinforced by BFRP anchors under the same working conditions of seismic waves. In addition, we found that the acceleration response spectrum distribution curve of each measuring point in the short period has an obvious amplification effect along the elevation, and its predominant period has a forward migration phenomenon with the increase of the height of the measuring point, which also indicates that the higher frequency seismic wave has a greater impact on the top of the slope. The BFRP anchors, as a kind of flexible structure supporting slope, can effectively reduce the impact of seismic waves on the slope and attenuate seismic waves to a certain extent compared with steel anchors. Furthermore, the BFRP anchors can be deformed in coordination with the slope, which can improve the overall working performance of the slope, especially limit the dynamic response of the middle and lower slopes. These results can provide a theoretical guide for the seismic design of BFRP anchors for high slopes.

scholarly journals Dynamic Response and Time-Frequency Characteristic of Dangerous Rocks under the Combined Action of Rock Cavity Weathering and Earthquake

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Qingyang Ren ◽  
Honghua Jin ◽  
Xiaokun Ren ◽  
Xingxing Zhang
Keyword(s):  
Dynamic Response ◽  
Seismic Waves ◽  
Three Dimensional ◽  
Time History ◽  
Steep Slope ◽  
Time Frequency ◽  
Failure Evolution ◽  
Combined Action ◽  
Rock Model ◽  
Matlab Programming

In order to further reveal the failure mode and dynamic response law of dangerous rocks with different degree of weathering in the rock cavity under the action of earthquake and to provide early warning and forecast for steep slope of dangerous rocks in similar earthquake areas, a typical steep slope of dangerous rock in earthquake area of Sichuan, China, was taken as the research object, after detailed geological survey, and according to the chain development law of dangerous rock, the steep slope of dangerous rock before the earthquake was restored. Based on the 3D particle flow software PFC3D, the dangerous rock was divided into 3 modes according to the degree of weathering of the mudstone rock cavity, and the three-dimensional discrete element dangerous rock model under different modes was established. By introducing the horizontal and vertical two-way coupled seismic waves in Wenchuan, Sichuan, in 2008, the failure evolution process of steep slope of dangerous rock under the action of the horizontal and vertical coupled seismic waves was dynamically simulated, which proved the rationality of the simulation. The frequency spectrum of velocity-time history signal of each rock block in the dangerous rock model was analyzed by MATLAB programming, and the time-frequency characteristics of each dangerous rock model under the action of coupled seismic wave were studied. The research results have important scientific guiding significance and practical value for the dynamic stability evaluation and prediction of such steep slope of dangerous rocks under the combined action of rock cavity weathering and earthquake.

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