Seismic Performance of a Block-Type Quay Wall with Liquefiable Backfill: Comparison Between Centrifuge Test, Design Code, and High-Fidelity Numerical Modeling

The simplified Bernoulli equation relates fluid convective energy derived from flow velocities to a pressure gradient and is commonly used in clinical echocardiography to determine pressure differences across stenotic orifices. Its application to pulmonary venous flow has not been described in humans. Twelve patients undergoing cardiac surgery had simultaneous high-fidelity pulmonary venous and left atrial pressure measurements and pulmonary venous pulsed Doppler echocardiography performed. Convective gradients for the systolic (S), diastolic (D), and atrial reversal (AR) phases of pulmonary venous flow were determined using the simplified Bernoulli equation and correlated with measured actual pressure differences. A linear relationship was observed between the convective ( y) and actual ( x) pressure differences for the S ( y = 0.23 x + 0.0074, r = 0.82) and D ( y = 0.22 x + 0.092, r = 0.81) waves, but not for the AR wave ( y = 0.030 x + 0.13, r = 0.10). Numerical modeling resulted in similar slopes for the S ( y = 0.200 x − 0.127, r = 0.97), D ( y = 0.247 x − 0.354, r= 0.99), and AR ( y = 0.087 x − 0.083, r = 0.96) waves. Consistent with numerical modeling, the convective term strongly correlates with but significantly underestimates actual gradient because of large inertial forces.

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Seismic performance of block-type quay walls with liquefiable calcareous sand backfill

Soil Dynamics and Earthquake Engineering ◽

10.1016/j.soildyn.2020.106092 ◽

2020 ◽

Vol 132 ◽

pp. 106092 ◽

Cited By ~ 3

Author(s):

Hexin Liu ◽

Jian-Min Zhang ◽

Xuedong Zhang ◽

Rui Wang

Keyword(s):

Seismic Performance ◽

Block Type ◽

Calcareous Sand

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High-Fidelity Numerical Modeling of Spark Plug Erosion

10.4271/2019-01-0215 ◽

2019 ◽

Cited By ~ 3

Author(s):

Douglas Breden ◽

Anand Karpatne ◽

Kenta Suzuki ◽

Laxminarayan Raja

Keyword(s):

Numerical Modeling ◽

High Fidelity ◽

Spark Plug

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THE EFFECT OF SOIL LIQUEFACTION ON THE SEISMIC PERFORMANCE OF A TYPICAL PORT QUAY WALL

XI International Conference on Structural Dynamics ◽

10.47964/1120.9241.20228 ◽

2020 ◽

Author(s):

Stella Karafagka ◽

Stavroula Fotopoulou ◽

Anna Karatzetzou ◽

Georgia Kroupi ◽

Kyriazis Pitilakis

Keyword(s):

Seismic Performance ◽

Soil Liquefaction ◽

Quay Wall

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Comparative study on the seismic performance of two types of quay wall structures

Marine Georesources and Geotechnology ◽

10.1080/1064119x.2016.1214196 ◽

2016 ◽

Vol 35 (5) ◽

pp. 621-630 ◽

Cited By ~ 1

Author(s):

Bin Ye ◽

Guanlin Ye ◽

Jiafeng Lu

Keyword(s):

Comparative Study ◽

Seismic Performance ◽

Wall Structures ◽

Quay Wall

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Experimental Study for Seismic Performance of Confined Masonry Structure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.1826 ◽

2013 ◽

Vol 353-356 ◽

pp. 1826-1831

Author(s):

Tie Jun Qu ◽

Yan Ping Wang ◽

Xian Yun Wang

Keyword(s):

Seismic Performance ◽

Dynamic Test ◽

Hysteresis Loops ◽

Structural Response ◽

Time History ◽

Design Code ◽

Restoring Force ◽

Static Test ◽

Confined Masonry ◽

Made In

A two-story masonry housing model was made in this paper. According to Intensity 7, adjusted Northridge record was selected to be the ground motion input in the pseudo-dynamic test. Pseudo-dynamic test and pseudo-static test were carried out to investigate the seismic behavior of the model structure. The time-history curves of the acceleration, velocity, displacement and restoring force of the structural response were obtained besides the time-history curves of the measuring points of the structure. Also the steel strain of the tie-columns and the hysteresis loops of the structure were obtained. The result shows multi-story confined masonry structures possess superior seismic performance if coordinated with the provision specified in the current compulsory design code and it can continue to use after appropriate dressing under the rarely earthquake.

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