Reliability-monitoring data coupled model for concrete slab safety evaluation of CFRD and its engineering application

Structures ◽  
2022 ◽  
Vol 35 ◽  
pp. 520-530
Author(s):  
Junru Li ◽  
Xiang Lu ◽  
Jiankang Chen ◽  
Songlin Yang ◽  
Chufeng Kuang ◽  
...  
Keyword(s):  
Concrete Slab ◽  
Engineering Application ◽  
Safety Evaluation ◽  
Coupled Model ◽  
Monitoring Data ◽  
Reliability Monitoring

scholarly journals Structural Safety Evaluation of Tunnel Based on the Dynamic Monitoring Data during Construction

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Xiaokun Yan ◽  
Hu Li ◽  
Feng Liu ◽  
Yang Liu
Keyword(s):  
Safety Evaluation ◽  
Constitutive Relationship ◽  
Monitoring Data ◽  
Dynamic Monitoring ◽  
Structural Safety ◽  
Underground Excavation ◽  
Tunnel Excavation ◽  
Evaluation Approach ◽  
Relationship Of ◽  
Shallow Buried Tunnel

It is still a challenge to accurately evaluate the structural safety of tunnel during the process of construction. To address this issue, a safety evaluation approach of tunnel based on the monitoring data during construction is proposed in this study. Firstly, the detailed description of modelling the tunnel excavation, releasing the load acting on the tunnel, and selecting the constitutive relationship of surrounding rock of tunnel is introduced. Secondly, aiming at an actual shallow-buried tunnel with underground excavation, utilizing the analytical results of deformation of tunnel, the structural safety of tunnel is evaluated by using a reliability-based method. Finally, the effectiveness of the proposed method is demonstrated by using the dynamic monitoring data obtained during the construction of an actual tunnel.

Summary of Study on Composite Concrete Slabs

2013 ◽  
Vol 351-352 ◽  
pp. 695-698
Author(s):  
Lei Wang ◽  
Hong Ya Zhang
Keyword(s):  
Reinforced Concrete ◽  
Composite Structure ◽  
Concrete Slab ◽  
Engineering Application ◽  
Concrete Slabs ◽  
Reinforced Concrete Slab ◽  
Recent Advances ◽  
The Future ◽  
At Home

Reinforced Concrete Slab is one of the important types of composite structure, About the concrete laminated slab of the research and the engineering application are summarized, Point out that the characteristics of Composite Concrete Slabs, the application and development of the laminated slab of recent advances at home and abroad, and look into the future of the Composite Concrete Slabs research.

Monitoring Data Analysis of Piezometer in Xiao Langdi Sediment Tunnels

2013 ◽  
Vol 351-352 ◽  
pp. 1179-1182
Author(s):  
Xiao Zhe Wang ◽  
Jing Fu Kang ◽  
Chu Ne Sui ◽  
Xiao Ping Xu
Keyword(s):  
Water Level ◽  
Rainy Season ◽  
Water Pressure ◽  
Influence Factors ◽  
Safety Evaluation ◽  
Monitoring Data ◽  
Operation Period ◽  
External Water ◽  
Service State

Whether the leakage taking place is an important basis for the safety evaluation of the hydraulic tunnels that the concrete liner was pre-stressed with tendons. Based on the long-term monitoring data of piezometers in Xiao Langdi pre-stressed sediment tunnels over operation period, the influence factors on the monitoring data of piezometer and the development of measured water pressure were analyzed. The results show that the variation of water level in the tunnel has no impact on the monitoring data of piezometers when the sediment tunnels were in service state; The variation of piezometers monitoring data closely related to the seasonal variation,it increased in rainy season and returned to normal in the dry season. The main reason resulting in the increase of water pressure measured by piezometer is the arising of external water level in rainy season. No leakage phenomenon was observed in Xiao Langdi sediment tunnels over operation period. Based on the monitoring results a conclusion can be made that the design requirements of anti-cracking and anti-leakage were satisfied in Xiao Langdi sediment tunnels.

scholarly journals Research on Rub-Impact Loads Response of Ship Shafting

2018 ◽  
Vol 25 (s2) ◽  
pp. 85-91 ◽  
Author(s):  
Liang-xiong Dong ◽  
Yi-ran Shi ◽  
Shao-hua Wang
Keyword(s):  
Torsional Vibration ◽  
Power Transmission ◽  
Impact Load ◽  
Engineering Application ◽  
Safety Evaluation ◽  
Maximum Amplitude ◽  
Impact Loads ◽  
Test Rig ◽  
Torsion Vibration ◽  
Special Working

Abstract The anti-impact ability of shafting affects stability and security of the ship power transmission directly. Moreover, it also cannot be ignored that the rub-impact loads have influence on the torsion vibration of ship shafting. In order to solve the problem of engineering application of reliability assessment under rub-impact loads, a test rig with rubbing generator is established. By carrying out the integrative analysis, the torsional vibration characteristics, such as vibration amplitude and orbit of axle center under the rub impact load are studied. According to the rub-impact conditions obtained through numerical simulation, the experimental verification is carried out on the test rig with rubbing generator. The results show that it is not obvious the influence of rub-impact loads upon the shafting torsion vibration except in special working conditions, that can be simulated by the rubbing generator. The maximum amplitude of torsional vibration is influenced by the radial rigidity as well as the friction coefficient of rubbing body, and the degree of influence is difference under conditions of continuous rubbing and serious rubbing. By adjusting the rigidity of stern bearing, the influence of rub-impact upon shafting can be weaken, which provides a theoretical reference for the safety evaluation of ship shafting.

scholarly journals Application of intelligent anchor cable axial force monitoring system in foundation pit support engineering

2018 ◽  
Vol 175 ◽  
pp. 03019
Author(s):  
HUANG Zheng-jun ◽  
ZHANG Lei ◽  
JIAO Shen-hua ◽  
LIU Yu ◽  
ZHANG Dong ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Axial Force ◽  
Engineering Application ◽  
Monitoring Data ◽  
Support Structure ◽  
Foundation Pit ◽  
Anchor Cable ◽  
Force Monitoring ◽  
Support Engineering

Using the self-developed intelligent anchor (cable) axial force monitoring system, real-time on-line monitoring of the axial force of the prestressed anchor and anchor cable in the foundation pit support structure system is realized. The system has automatic acquisition, wireless transmission, real-time monitoring and other advantages. Through actual engineering application and comparative analysis of traditional methods of monitoring data, it can be seen that the monitoring data is also valid and reliable, and the continuity and difference error of the measured curve is better than the traditional method. The system monitoring data can better reflect the relationship between the support structure stress, deformation and construction process in the foundation pit engineering and provide a strong guarantee for the safe and efficient construction of the foundation pit project.

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