Analysis of Stress in Construction Monitoring of Long - Span Concrete Bridge

2017 ◽  
Vol 1 (1) ◽  
pp. 6
Author(s):  
Jianwei Li
Keyword(s):  
Concrete Bridges ◽  
Concrete Bridge ◽  
Construction Technology ◽  
Construction Process ◽  
Stress Monitoring ◽  
Construction Monitoring ◽  
Technology Application ◽  
Large Span ◽  
Long Span

In order to improve the quality of the relevant construction development activities and effectively meet the special requirements of the design and construction of large span concrete bridges, the safety, effectiveness and economy of the bridge are fully enhanced. In this paper, the spatial structure of the long span concrete bridge is very special. As well as environmental adaptability, technical staff should be based on the development of large and span concrete bridge construction activities of the actual needs of large-span concrete bridge for scientific design and planning, but also the construction technology application activities for scientific supervision. The purpose of this paper is to explore the scientific and efficient application of stress monitoring in the construction process of large span concrete bridge under the guidance of the relevant theory of construction from the perspective of stress monitoring, so as to ensure the accuracy of construction activities and promote the development of bridge orderly development.

Analysis of Stress in Construction Monitoring of Long - Span Concrete Bridge

2017 ◽  
Vol 1 ◽  
pp. 6
Author(s):  
Jianwei Li
Keyword(s):  
Concrete Bridges ◽  
Concrete Bridge ◽  
Construction Technology ◽  
Construction Process ◽  
Stress Monitoring ◽  
Construction Monitoring ◽  
Technology Application ◽  
Large Span ◽  
Long Span

In order to improve the quality of the relevant construction development activities and effectively meet the special requirements of the design and construction of large span concrete bridges, the safety, effectiveness and economy of the bridge are fully enhanced. In this paper, the spatial structure of the long span concrete bridge is very special. As well as environmental adaptability, technical staff should be based on the development of large and span concrete bridge construction activities of the actual needs of large-span concrete bridge for scientific design and planning, but also the construction technology application activities for scientific supervision. The purpose of this paper is to explore the scientific and efficient application of stress monitoring in the construction process of large span concrete bridge under the guidance of the relevant theory of construction from the perspective of stress monitoring, so as to ensure the accuracy of construction activities and promote the development of bridge orderly development.

Construction Monitoring of Long Span Continuous Rigid Frame Box Girder Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 2715-2722 ◽  
Author(s):  
Guang Yue Wang ◽  
Jian Liu ◽  
Qi Fan
Keyword(s):  
Internal Force ◽  
Construction Technology ◽  
Construction Process ◽  
Stress Monitoring ◽  
Box Girder ◽  
Construction Monitoring ◽  
Long Span ◽  
Rigid Frame ◽  
Box Girder Bridge ◽  
Girder Bridge

The construction of a modern long span rigid frame box girder bridge gives impetus to the development of structural analysis design theory and construction technology. Moreover, it makes construction monitoring of the rigid frame box bridge a significant research subject. Construction monitoring of the rigid frame box bridge signifies regulating the structure’s internal force and alignment in the construction process and completion state, and thence satisfies the designed expectation. Based on the construction monitoring of Liang-Ji Canal Bridge project, the construction process and the designed completion state have been simulated and analyzed at a certain precision level [1]. A plane bar finite element computational model is established, and the alignment and internal force of the bridge in each construction stage are analyzed. Then the simulation analysis of construction process is derived according to its construction characteristics [2]. Through systematical research on the form work elevation and the stress monitoring of the cantilevers during the cast-in-situ construction, the factors which influence deflection and stress are analyzed. The elevation is predicated by the Kalman's filter estimation, the modified grey model and the combination of these two methods. The stress monitoring error and corresponding reasons are analyzed. The measured results show that the combination of the two approaches can improve prediction accuracy. The presented analysis, processing and control methods accumulate many experiences for the design and construction of the long span box girder rigid frame bridge.

Construction Monitoring Technology Research on Large-Span V Structure Tied Arch Bridge

2013 ◽  
Vol 351-352 ◽  
pp. 1240-1243 ◽  
Author(s):  
Ting Yin ◽  
Wei Zhang ◽  
Yan Bo Zhao ◽  
Xiao Long Sun
Keyword(s):  
Actual State ◽  
Construction Process ◽  
Bridge Construction ◽  
Monitoring Point ◽  
Monitoring Technology ◽  
Construction Monitoring ◽  
Arch Bridge ◽  
Large Span ◽  
Long Span ◽  
Tied Arch Bridge

Large-span V structure tied arch bridge structure system is complex. In order to make the actual state of the bridge into the ideal state of maximum close to the design, we must make real-time monitoring in the key parts of the structure, and adjust to the design of the data by analysis calculated, to ensure the safety and reliability of arch bridge in the course of construction and into stress after the completed bridge. Combined with the construction monitoring of the main Xinglong Bridge on Si River, this paper introduces the main bridge construction process measurement a preliminary study on the large span V configuration basket tied arch bridge construction monitoring technology. Based on the construction monitoring of Xinglong Bridge on Si River, this paper introduces the main contents and methods of monitoring point location, monitoring control of construction process, and discussed the construction monitoring technology of long-span X-style tied arch bridge V structure.

Temperature and Displacement Monitoring to Steel Roof Construction of Shenzhen Bay Stadium

2016 ◽  
Vol 16 (04) ◽  
pp. 1640020 ◽  
Author(s):  
Jun Teng ◽  
Wei Lu ◽  
Yan Cui ◽  
Rengui Zhang
Keyword(s):  
Large Scale ◽  
Steel Structure ◽  
Monitoring Data ◽  
Cycle Duration ◽  
Construction Process ◽  
Construction Monitoring ◽  
Long Span ◽  
Wide Range ◽  
Structure Complexity ◽  
Steel Roof

The long-span spatial steel structure takes its complex construction process because of its features, such as large scale, wide range, and long cycle duration. Simultaneously, the structural construction process can not only affect the shaping of long-span spatial structure, but also produce a great effect to structural final force state, which makes the construction monitoring of long-span spatial steel structure necessary. The most important construction parts for Shenzhen Bay Stadium steel roof are unloading process and closure process. Considering the structure complexity in the construction phase, a structural health monitoring system was installed, which began to be built in early 2010 and contained two phases: construction monitoring and operation monitoring. In this paper, the temperatures and displacements monitoring in construction phase are firstly described in detail. The monitoring data of temperature and displacement measured in unloading and closure phases are then analyzed, respectively. According to these monitoring data, the comprehensive understanding for the structural performances in construction phase is shown and discussed, which can provide a reference of construction monitoring for the related projects.

Calculation of Temperature Rise of Mass Concrete and Modification of Formula

2012 ◽  
Vol 594-597 ◽  
pp. 742-748
Author(s):  
Yu Ming Hu ◽  
Chuan Liang
Keyword(s):  
Temperature Rise ◽  
Tall Buildings ◽  
Mass Concrete ◽  
Construction Technology ◽  
Construction Process ◽  
Actual Measurement ◽  
Measurement Results ◽  
And Function ◽  
Peak Value

With the continuous improvement of China’s construction technology, the application of mass concrete structures is increasingly popular in various structures in order to meet the requirements of structure and function, such as tall buildings, dams, railways and highways. There are all kinds of cracks in construction process because of the big cross section. There are many reasons to form cracks, but temperature is the most common cause. It is vital to the construction quality of mass concrete that the hydration heat, especially the peak value of temperature rise, is calculated in advance and precautions are implement in construction process accordingly. In this article, the calculation formula modified is derived through analyzing the common calculation formulas of mass concrete, the actual measurement results and the influencing factors of temperature rise.

Analysis on the Mass Concrete Test and Application in Stadium Project

2013 ◽  
Vol 416-417 ◽  
pp. 1738-1740
Author(s):  
Chun Hong Xu ◽  
Zhan Fu Jing
Keyword(s):  
Mass Concrete ◽  
Construction Technology ◽  
Construction Process ◽  
Concrete Technology ◽  
Technical Application ◽  
Engineering Construction ◽  
Key Points ◽  
Series Of Experiments

Mass concrete technology has been widely used in the construction field. In engineering construction, the quality and construction technology of mass concrete are directly related to the quality of the projects. Thus, before the construction of mass concrete, a series of experiments should be made, and also the key points of the construction technology should be strictly followed in the construction process. In this paper, by taking the application of mass concrete in stadium project as an example, the test before the construction of mass concrete and the technical application in the construction are analyzed.

scholarly journals The Construction Technology of Roof Steel Structure in YanCheng NanYang Airport

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Qin Yang ◽  
Shaole Yu ◽  
Xuewei Zhang ◽  
Zhijun Wang ◽  
Junsheng Yan ◽  
...  
Keyword(s):  
Maximum Stress ◽  
Steel Structure ◽  
Construction Safety ◽  
General Situation ◽  
Construction Technology ◽  
Construction Process ◽  
Construction Monitoring ◽  
Construction Scheme ◽  
Project Characteristics ◽  
Elastic Stage

The roof steel structure in the Terminal 2 building of YanCheng NanYang Airport has a large span and a considerably difficult construction. According to the project characteristics, the construction scheme of the roof steel structure follows the principle of subareas and substeps, with the truss lifting in segmentation. To ensure construction safety, a construction monitoring scheme was adopted in this project. According to the layout of the roof steel structure, a total of 10 monitoring points are arranged to monitor the stress of the roof steel structure during the construction process. This paper first gives a brief introduction to the general situation regarding the engineering, followed by a detailed description of the construction scheme of such a roof steel structure. Then, the monitoring results, including monitoring of the main truss’ stress and column head, are introduced. The monitoring results revealed that the variation of stress in monitoring points followed the same trend as the monitoring data. The maximum stress was 166.6 MPa according to the monitoring results, which indicate that the stress of the roof steel structure is in the elastic stage during the construction process and the construction scheme is feasible.

scholarly journals Scientometric Analysis for Mechanical Performance of Broken-Line Long-Span Steel Structure in Construction Considering Geometric Nonlinearity

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1229
Author(s):  
Gang Yao ◽  
Chaoyu Wu ◽  
Yang Yang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Steel Structure ◽  
Element Model ◽  
Structural Quality ◽  
Scientometric Analysis ◽  
Construction Process ◽  
Large Span ◽  
Long Span ◽  
The Impact

A structure does not reach a stable state during the construction process, and hence its structural reliability is low. In order to ensure the safety of the construction process and final structural quality, it is necessary to analyze the safety and structural mechanical properties of large-span space steel structures during the construction process. Based on the engineering background of the polyline symmetrical large-span steel structure construction process, this research established a finite element model of the large-span steel structure on an ANSYS platform. The correctness of the model was verified by comparing the measured frequency of the large-span steel structure with the frequency calculated in the finite element model. Based on the life-death element method, the internal force and deformation response characteristics of the large-span steel structure in the construction process were analyzed, and the different effects of the on-time completion and step-by-step construction on the performance of the broken-line large-span steel structure were compared and analyzed. The study found that the long-span steel truss structure is more sensitive to the construction process, and the final forming state is greatly affected by the construction process. The construction sequence is different, and the structure process and size and distribution of the final stress and deformation are also different. The analysis result of the construction process is closer to that of the actual project. Therefore, appropriate construction paths should be used in the construction process to reduce the impact of path effects on structural performance. It is recommended to pay more attention to the displacement and stress response of the truss when it encounters similar a symmetrical long-span steel structure truss in-place of the forming construction.

Monitoring of Long-Span Self-Anchored Arch Bridge Constructed with Rotation Method

2012 ◽  
Vol 178-181 ◽  
pp. 1977-1982 ◽  
Author(s):  
Juan Hu ◽  
Xiao Yi Sun ◽  
Sheng Jun Jiao
Keyword(s):  
Vertical Displacement ◽  
Construction Process ◽  
Construction Monitoring ◽  
Arch Bridge ◽  
Long Span ◽  
Rotation Method ◽  
Complicated Process ◽  
Final Design ◽  
Design Requirements

In recent years, rotation construction is widely used in construction of arch birdge, and the method of construction is difficult and has complicated process. Construction process control for rotation construction of the long-span anch bridge is not only the key measure to ensure the states meeting the design requirements of the constructed bridge, but also is the important part to ensure the construction quality and safety. Therefore, it is necessary to control the construction for the long-span self-anchored arch bridge. The paper established the control system according to the rotation constrcution for the long-span self-anchored arch bridge which is overpass a exited major highway. And took a follow-up observations for the actual states of the constructing arch bridge, and used the finite enlement software ANSYS to analyze the stress of the structure and static and dynamic stress in the process of rotation construction. Comparing the theoretical value to the measured results showed that there was good meet between the results. And the rotation construction was stable, the vertical displacement and the acceleration were smaller, and didn’t take a bad effects on the structure. According to the results of the finite element and monitoring, it will provide the target of the construction monitoring for each construction segment, and meet the final design of the bridge, furthermore it will provide a reliable reference for the smooth progress of construction.

Concrete Properties for Long-Span Post-Tensioned Slabs

2018 ◽  
Vol 926 ◽  
pp. 122-127
Author(s):  
Rafał Szydłowski
Keyword(s):  
Modulus Of Elasticity ◽  
Concrete Strength ◽  
Large Span ◽  
Long Span ◽  
Concrete Properties ◽  
Post Tensioned

In contrast to foreign practice, in Poland, for many years, there has been a belief, that in prestressed constructions, more expensive concretes on basalt aggregates should be applied. This habit is due to the low quality of national river and fossil aggregates. They allow to obtain low concrete strength and modulus of elasticity. In the paper, basing on two examples of post-tensioned slabs, it has been shown, that it is possible to use concretes with a low value of modulus of elasticity for large-span slabs. These results may be significant in popularizing the use of post-tensioned slabs in buildings in poorer countries, making them cheaper in execution.

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