Cable Force Adjustment and Construction Control

2014 ◽  
pp. 113-136
Author(s):  
Dajian Han ◽  
Quansheng Yan
Keyword(s):  
Construction Control ◽  
Cable Force

Temperature Effect Analysis of the Twin Towers Concrete Cable-Stayed Bridge for Construction Control

2013 ◽  
Vol 671-674 ◽  
pp. 1055-1063
Author(s):  
Gui Zhen Wang ◽  
Ying Min Li
Keyword(s):  
Temperature Field ◽  
Temperature Effect ◽  
Great Influence ◽  
Internal Force ◽  
Construction Control ◽  
Effect Analysis ◽  
Temperature Changes ◽  
Distribution Rule ◽  
Cable Force ◽  
Main Girder

It exists a great influence on deformation and internal force of large span bridge when temperature changes, the influence of the temperature must be considered and try to avoid in the process of construction control. Under monitoring to the construction process of Tieluoping super-large bridge on the scene, the influence law on internal force of Tieluoping Bridge is analyzed considering temperature effect, and the influence considering the sunshine temperature difference on cable tower deviation and stress is obtained, and the size of influence of main girder elevation, cable force and strain because of temperature field and distribution rule internal temperature field are clear. It provides powerful help for the smooth construction.

The Clever Use of Neutron-Axis of the Girder in the Stress Measurement of the Large Span PC Cable Stayed Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 1696-1701
Author(s):  
Yu Feng Xu
Keyword(s):  
Normal Stress ◽  
Stress Measurement ◽  
The Other ◽  
New Method ◽  
Construction Control ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Creep Coefficient ◽  
Horizontal Part ◽  
Cable Force

As the stress measurement of interior concrete is hard in the construction control of the cable- stayed bridge, a new method fitted for stress measurement in large span PC concrete cable-stayed bridge is proposed in this paper. This method is based on the principle that the normal stress in neutron-axis of girder is only decided by the horizontal part of the cable force. First, the normal stress on the neutron-axis of girder is calculated by the measured cable force, and then the creep coefficient is identified, and finally the other stresses are worked out. This method has been applied to a large span PC cable-stayed bridge constructed in process with favourable results and thus proves its accuracy and efficiency.

Analysis of Parameters' Sensitiveness of Long-Span Hybrid Girder Cable-Stayed Bridge

2012 ◽  
Vol 517 ◽  
pp. 817-823
Author(s):  
Zhong San Li ◽  
Jun Qing Lei ◽  
Dong Huang Yan
Keyword(s):  
Tensile Force ◽  
Design Parameters ◽  
Highway Bridge ◽  
Construction Control ◽  
Test Results ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Control Precision ◽  
Good State ◽  
Cable Force

In order to improve the construction control precision of long-span hybrid girder cable-stayed bridge, the design parameters such as the weight of girder, the cable tensile force and the stiffness of cable are conducted sensitivity analysis through computing and comparing the influences of these parameters on the deflection of girders, the stress of girders and the cable force in the bridge's completion state. It was shown by the computation results that the main parameters of long-span hybrid girder cable-stayed bridge are the weight of girder and the cable tensile force, the stiffness of cable has a little influence on the completion state of the bridge. With this approach, through modifying the main parameters, while ignoring the influences of the secondary ones, the Jingyue Yangtze River Highway Bridge construction control has been successfully done. The test results show that the cable force and the contour of the bridge are in good state. They are both in the range of control, the relative error of the cable force is less than 3% and the elevation deviation is less than 5mm.

scholarly journals Study of Cable Force of Construction Control and Alignment Control of Main Girders for Long-Span Railway Cable-Stayed Bridges

2013 ◽  
Vol 7 (9) ◽  
Author(s):  
Zengshun Chen ◽  
Cheng Zhang ◽  
Jianting Zhou ◽  
Jun Song ◽  
Chunrong Huang
Keyword(s):  
Construction Control ◽  
Long Span ◽  
Cable Force ◽  
Cable Stayed Bridges

Cable Force Adjustment and Construction Control

2003 ◽  
pp. 7-1-7-22
Author(s):  
Danjian Han ◽  
Quansheng Yan
Keyword(s):  
Construction Control ◽  
Cable Force

Construction Control As A Strategy For Improving The Quality Of Buildings And Structures

2020 ◽  
Keyword(s):  
Quality Control ◽  
Life Cycle ◽  
Construction Control ◽  
Construction Sites ◽  
Actual Problem ◽  
Construction Market ◽  
Construction Products ◽  
Underlying Causes ◽  
Required Quality

In construction production, the safety of constructing buildings and structures is achieved by ensuring the required quality as a result of systematic construction control based on the implementation of a complex of technical, economic and organizational measures at all stages of the object's life cycle. The article deals with the actual problem of improving the quality of construction products-buildings and structures in conjunction with the activities of construction control bodies. The article presents the advanced foreign and domestic experience of ensuring the quality control at the construction sites, providing for the prevention of the underlying causes of defects and increasing the interest of the contractors directly. On the basis of the analysis of the current situation with quality control at the construction market, ways to improve its efficiency by developing a unified system of technological implementation of relevant requirements for the quality of construction products, determining the rational number and business load of construction control engineers, as well as the active activities of self-regulatory organizations in this area are offered.

Research on sports aided teaching and training decision system oriented to deep convolutional neural network

2021 ◽  
pp. 1-15
Author(s):  
Qinyu Mei ◽  
Ming Li
Keyword(s):  
Neural Network ◽  
Decision Making ◽  
Control System ◽  
Convolutional Neural Network ◽  
Force Control ◽  
Control Experiment ◽  
Deep Convolutional Neural Network ◽  
Flexible Cable ◽  
Cable Force ◽  
And Training

Aiming at the construction of the decision-making system for sports-assisted teaching and training, this article first gives a deep convolutional neural network model for sports-assisted teaching and training decision-making. Subsequently, In order to meet the needs of athletes to assist in physical exercise, a squat training robot is built using a self-developed modular flexible cable drive unit, and its control system is designed to assist athletes in squatting training in sports. First, the human squat training mechanism is analyzed, and the overall structure of the robot is determined; second, the robot force servo control strategy is designed, including the flexible cable traction force planning link, the lateral force compensation link and the establishment of a single flexible cable passive force controller; In order to verify the effect of robot training, a single flexible cable force control experiment and a man-machine squat training experiment were carried out. In the single flexible cable force control experiment, the suppression effect of excess force reached more than 50%. In the squat experiment under 200 N, the standard deviation of the system loading force is 7.52 N, and the dynamic accuracy is above 90.2%. Experimental results show that the robot has a reasonable configuration, small footprint, stable control system, high loading accuracy, and can assist in squat training in physical education.

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