scholarly journals EXPERIMENTAL STUDY ON THE STRUCTURAL PERFORMANCE OF THE L-TYPE RETAINING WALL AND LEAN-TYPE RETAINING WALL WITH UNIFORMLY DISTRIBUTED LOAD ON THE GROUND SURFACE

2001 ◽  
Vol 66 (548) ◽  
pp. 73-80 ◽  
Author(s):  
Shozo WADA ◽  
Hiroaki OIKAWA ◽  
Makoto KOUDA ◽  
Hideto SATO ◽  
Masahito TAMURA
Keyword(s):  
Experimental Study ◽  
Retaining Wall ◽  
Ground Surface ◽  
Structural Performance ◽  
Distributed Load ◽  
Uniformly Distributed Load

Study on the Influence of Active Earth Pressure Caused by the Ditch behind Retaining Wall

2012 ◽  
Vol 204-208 ◽  
pp. 255-258
Author(s):  
Guang Qi Sheng ◽  
Ying Hui Chen ◽  
Fang Sun ◽  
Bo Wei ◽  
Yan Lian Pan
Keyword(s):  
Calculation Method ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Plane Boundary ◽  
Infinite Plane ◽  
Active Earth Pressure ◽  
Regular Pattern ◽  
Distributed Load ◽  
Uniformly Distributed Load

To study the influence of active earth pressure caused by the ditch after retaining wall, we will treat the ditch as unloading, and use the resolve of uniformly distributed load on half-infinite plane boundary to get the calculation method to get the influence of active earth pressure caused by the ditch after retaining wall. At last, from an example, we will get the picture of active earth pressure caused by the ditch after retaining wall, and analysis the regular pattern and characteristics.

Experiment and Finite Element Study on the Structural Behavior of Steel Sandwich Panels

2010 ◽  
Vol 168-170 ◽  
pp. 1051-1054
Author(s):  
Xiao Xiong Zha ◽  
Pei Cheng Qin ◽  
Hong Xin Wang
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Polyurethane Foam ◽  
Sandwich Panels ◽  
Structural Behavior ◽  
Finite Element Models ◽  
Finite Element Study ◽  
Distributed Load ◽  
Uniformly Distributed Load ◽  
Element Study

This work try to deal with the analysis of a class of sandwich panels widely employed in engineering constructions. In order to study its structure behavior, a systematic experimental study on both roof and wall sandwich panels filled with Polyurethane foam (PU) under uniformly distributed load is conducted. Informed by the tests, appropriate finite element models are developed to model the tests.

scholarly journals AN EXPERIMENTAL STUDY ON REPAIRABILITY AND RECOVERY OF STRUCTURAL PERFORMANCE FOR DAMAGED H-SHAPED STEEL MEMBERS

2014 ◽  
Vol 20 (44) ◽  
pp. 139-142
Author(s):  
Takeshi MATSUMOTO ◽  
Kenjiro MORI ◽  
Takumi ITO ◽  
Changhoon CHOI
Keyword(s):  
Experimental Study ◽  
Structural Performance ◽  
Steel Members

scholarly journals Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0242892
Author(s):  
Marcus Fraga Vieira ◽  
Fábio Barbosa Rodrigues ◽  
Alfredo de Oliveira Assis ◽  
Eduardo de Mendonça Mesquita ◽  
Thiago Santana Lemes ◽  
...  
Keyword(s):  
Time Series ◽  
Center Of Pressure ◽  
Center Of Mass ◽  
Statistical Parametric Mapping ◽  
Gait Initiation ◽  
Experimental Conditions ◽  
Distributed Load ◽  
Uniformly Distributed Load ◽  
Reaction Forces ◽  
Controlled Object

The purpose of this study was to investigate the effects of different vertical positions of an asymmetrical load on the anticipatory postural adjustments phase of gait initiation. Sixty-eight college students (32 males, 36 females; age: 23.65 ± 3.21 years old; weight: 69.98 ± 8.15 kg; height: 1.74 ± 0.08 m) were enrolled in the study. Ground reaction forces and moments were collected using two force platforms. The participants completed three trials under each of the following random conditions: no-load (NL), waist uniformly distributed load (WUD), shoulder uniformly distributed load (SUD), waist stance foot load (WST), shoulder stance foot load (SST), waist swing foot load (WSW), and shoulder swing foot load (SSW). The paired Hotelling’s T-square test was used to compare the experimental conditions. The center of pressure (COP) time series were significantly different for the SUD vs. NL, SST vs. NL, WST vs. NL, and WSW vs. NL comparisons. Significant differences in COP time series were observed for all comparisons between waist vs. shoulder conditions. Overall, these differences were greater when the load was positioned at the shoulders. For the center of mass (COM) time series, significant differences were found for the WUD vs. NL and WSW vs. NL conditions. However, no differences were observed with the load positioned at the shoulders. In conclusion, only asymmetrical loading at the waist produced significant differences, and the higher the extra load, the greater the effects on COP behavior. By contrast, only minor changes were observed in COM behavior, suggesting that the changes in COP (the controller) behavior are adjustments to maintain the COM (controlled object) unaltered.

Characteristics of groundwater seepage with cut-off wall in gravel aquifer. I: Field observations

2015 ◽  
Vol 52 (10) ◽  
pp. 1526-1538 ◽  
Author(s):  
Yong-Xia Wu ◽  
Shui-Long Shen ◽  
Ye-Shuang Xu ◽  
Zhen-Yu Yin
Keyword(s):  
Hydraulic Conductivity ◽  
Clayey Soil ◽  
Retaining Wall ◽  
Ground Surface ◽  
Test Site ◽  
Second Phase ◽  
Confined Aquifer ◽  
Test Results ◽  
Sandy Gravel ◽  
High Hydraulic Conductivity

This paper presents a case history of the leakage behavior during dewatering tests in the gravel strata of an excavation pit of a metro station in Hangzhou, China. The groundwater system at the test site is composed of a phreatic aquifer underlain by an aquitard and a confined aquifer with coarse sand and gravel. The sandy gravel stratum has very high hydraulic conductivity. The maximum depth of the excavation is 24 m below the ground surface, which reaches the middle of the aquitard strata, where the thickness of the clayey soil is insufficient to maintain the safety of the base of the excavation. To understand the hydrological characteristics of gravel strata, single- and double-well pumping tests were conducted, where a cut-off wall was installed 43 m deep with its base penetrating 2 to 3 m into the aquifer. Test results show that this partial cut-off of the aquifer cannot effectively protect the base of the excavation from the upward seepage force of the groundwater during excavation. Therefore, a new cut-off wall (second phase) was constructed to a depth of 54 m to cut off the confined aquifer. A second pumping test was conducted after the construction of the second phase cut-off wall, and test results show that this full cut-off combined with dewatering can control groundwater effectively during excavation. This finding indicates that when a deep excavation is conducted in a confined aquifer with high hydraulic conductivity, determination of the depth of the retaining wall should be based on three factors: the stability of the base, the upward seepage stability, and settlement control.

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