A PZT-based smart aggregate for seismic shear stress monitoring

2013 ◽  
Vol 22 (6) ◽  
pp. 065012 ◽  
Author(s):  
S Hou ◽  
H B Zhang ◽  
J P Ou
Keyword(s):  
Shear Stress ◽  
Stress Monitoring ◽  
Seismic Shear ◽  
Smart Aggregate

Feasibility of SA–based concrete seismic stress monitoring for high-strength concrete

2017 ◽  
Vol 28 (17) ◽  
pp. 2428-2436 ◽  
Author(s):  
Haibin Zhang ◽  
Shuang Hou ◽  
Jinping Ou
Keyword(s):  
High Strength Concrete ◽  
Full Range ◽  
Concrete Structures ◽  
High Strength ◽  
Stress Monitoring ◽  
Average Output ◽  
Strength Concrete ◽  
Smart Aggregate ◽  
Seismic Stress ◽  
Concrete Stress

Piezoelectric-based seismic stress monitoring provides an innovative approach to assessing the health of concrete structures during earthquakes. In this research, we evaluate the application of piezoelectric-based smart aggregate (SA) sensors for monitoring the seismic stress on high-strength concrete columns. The principle behind using smart aggregates for seismic stress monitoring is based on the assumption that concrete stress can be reliably predicted by the average output voltages of a limited number of embedded smart aggregates within an acceptable margin of error. This experiment is designed to evaluate the effects of meso-scale randomness on high-strength concrete and the effects of different loading paths on the proposed smart aggregate. Loading–unloading loops of increasing amplitude at the nonlinear stage and monotonic loading to failure were carried out on four high-strength concrete cylinders. Each specimen had six smart aggregates embedded. A statistical analysis based on the test results determined the sensitivity curve during the loading–unloading and the full-range damage processes. Monitoring errors of concrete stress monitored by smart aggregate during the pre- and post-peak stages were also discussed. The research concludes that there is the potential for deploying smart aggregate in engineering applications to monitor seismic stress on high-strength concrete structures.

Study on Characteristics of Seismic Ambient Shear Stress in Gansu Province

2014 ◽  
Vol 1065-1069 ◽  
pp. 1433-1437
Author(s):  
Xiu Feng Tian ◽  
Xuan Zhang ◽  
Ju Pu
Keyword(s):  
Shear Stress ◽  
Spatial Distribution ◽  
Stress Field ◽  
Gansu Province ◽  
Seismic Shear ◽  
Tectonic Environment ◽  
Relationship Of ◽  
The Relationship ◽  
Shear Stress Field ◽  
Ambient Shear Stress

The breeding and occurrence of earthquake closely related to the intensity and spatial distribution of ambient shear stress field. Earthquakes would happen when the regional shear stress enhanced to the damage limit of rocks. In this paper, we used some acceleration records in Gansu province, and calculated corresponding seismic shear stress value according to the theory put forward by Professor Chen Peishan. Combined with the tectonic environment, we discussed the relationship of ambient shear stress with the magnitude and hypocentral depth.

An Improved Shear Stress Monitoring Method in Numerical Direct Shear Tests by Particle Flow Code

2019 ◽  
Vol 48 (6) ◽  
pp. 20180018 ◽  
Author(s):  
Yaofei Jiang ◽  
Liangqing Wang ◽  
Qiong Wu ◽  
Zihao Sun ◽  
Davide Elmo ◽  
...  
Keyword(s):  
Shear Stress ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Direct Shear ◽  
Stress Monitoring ◽  
Shear Tests ◽  
Monitoring Method ◽  
Direct Shear Tests

Study on Sublevel Open Stoping with Subsequent Backfilling Mining Method Stope Parameters Optimization

2011 ◽  
Vol 250-253 ◽  
pp. 1567-1571
Author(s):  
Wei Dong Song ◽  
Dong Xu Wang ◽  
Ya Nan Tang
Keyword(s):  
Shear Stress ◽  
Stress Concentration ◽  
Underground Mining ◽  
Parameters Optimization ◽  
Mining Method ◽  
Displacement Monitoring ◽  
Stress Monitoring ◽  
Similar Material ◽  
Pillar Mining ◽  
Similar Material Simulation

This paper discusses the stope parameters of the sublevel subsequent filling stage in Daye Iron Shizishan section. According to the similar material simulation technology, which is the main means, displacement monitoring and internal stress monitoring, several conclusions are summarized as bellow: When the parameter of the room and pillar is 18m, the underground mining is safe and steady. Impacts, which come from different regions’ mining, is different, and the greatest impact comes from the pillar’ mining. Stress monitoring shows that before roof fell down, there is a process of stress concentration. The stress in the roof is shear stress, and compressive stress in the pillar.

Analysis of Base-Isolation Building System

2011 ◽  
Vol 368-373 ◽  
pp. 807-813
Author(s):  
Guo Wei Ni ◽  
Deng Ling Jiang ◽  
Jia Rui Qi ◽  
Juan Nong Chen
Keyword(s):  
Shear Stress ◽  
Seismic Response ◽  
Base Isolation ◽  
Isolation System ◽  
Seismic Shear ◽  
Base Isolation System ◽  
Building System

In order to improve the effect of isolation structure, the principles and behaviours of the base-isolation system are studied, and the types and characteristics of the base-isolation are also discussed. Compared to the traditional aseismatic structures, the base isolation structures decrease the seismic response obviously: the total structural aseismatic value decrease 1/4-1/32, the seismic shear stress in the upper structure decrease 1/14-1/23. In the huge seism, the structure can have the obvious aseismatic effect.

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