scholarly journals Subsection construction technology of rectangular concrete independent column with super high cross section

2021 ◽  
Vol 293 ◽  
pp. 02004
Author(s):  
Guangjun Li ◽  
Tianfang Mo ◽  
Ningbo Xu ◽  
Weixiong Zhang ◽  
Hanwen Lu ◽  
...  
Keyword(s):  
Implementation Process ◽  
Steel Structures ◽  
Phase Iii ◽  
Utilization Rate ◽  
Construction Technology ◽  
Engineering Technology ◽  
Research And Practice ◽  
Long Span Bridges ◽  
Long Span ◽  
Independent Column

With the progress of engineering technology, the ability of design and construction has been significantly improved, which the number of long-span construction and long-span Bridges and long-span steel structures are increasing more and more. As the main supporting members of Bridges and steel structures, the quality assurance of rectangular reinforced concrete independent columns is particularly important. In the implementation process of No.18 Maintenance Hangar Project of GAMECO Aircraft Maintenance Facility Phase III in Guangzhou Baiyun International Airport of China Southern Airlines, through research and practice, our company applied the subsection construction technology of super high section rectangular concrete independent columns, which can not only guarantee the quality and forming effect of the column body, but also reduce the input of formwork materials. Improve the utilization rate of formwork and scaffold effectively, and then reduce the input of turnover materials, and achieve remarkable results.

Large Bridges Recently Built in Poland

2018 ◽  
Author(s):  
Robert Toczkiewicz ◽  
Jan Biliszczuk ◽  
Marco Teichgraeber
Keyword(s):  
Construction Technology ◽  
Structural Configuration ◽  
Arch Bridge ◽  
Long Span Bridges ◽  
The Road ◽  
Long Span ◽  
Railway Infrastructure ◽  
Cable Stayed Bridges

<p>The road and railway infrastructure in Poland has been intensively developed and modernized for the last years. Around 300 new bridges are built annually. Among the new structures there is a group of modern long span bridges.</p> <p>This paper presents examples of selected, most interesting large road bridges built in recent years in Poland. The following structures are described:</p><ul><li> <p>two largest extradosed bridges in Europe – with spans exceeding 200 m;</p></li><li> <p>the largest arch bridge in Poland with 270 m long fixed arches and an expressway bridge with 200 m long arch span;</p></li><li> <p>two cable-stayed bridges.</p> <p>Structural configuration and construction technology of the above mentioned bridges are described.</p>

Structural Type Selection for Long-Span Bridges in Mountain Area

2012 ◽  
Vol 256-259 ◽  
pp. 1596-1600
Author(s):  
Dong Liang ◽  
Chang Rong Yao ◽  
Sai Zhi Liu
Keyword(s):  
Conceptual Design ◽  
Structural Type ◽  
Mountainous Area ◽  
Construction Technology ◽  
Mountain Area ◽  
Long Span Bridges ◽  
Long Span ◽  
Type Selection ◽  
Geological Conditions ◽  
Bridge Structures

As the western region is a mountainous area with geology complicated geological conditions, the proportion of bridges and tunnels is bigger. Based on the characteristic of mountainous route and long-span bridges, this paper discussed the conceptual design of mountainous bridges. Firstly, this paper analyzes the characteristic of mountainous long-span bridges and proposed some fundamental principles to design long-span bridges. After the comparison of the main bridge structures, the paper points out that the designer should select the best programs considering hydrological, geological, geomorphology, construction technology, transportation , geographical environment and social environment. The purpose of this paper is to give reference for the conceptual design of mountainous long-span bridges.

Research and practice of health monitoring for long-span bridges in the mainland of China

2015 ◽  
Vol 15 (3) ◽  
pp. 555-576 ◽  
Author(s):  
Hui Li ◽  
Jinping Ou ◽  
Xigang Zhang ◽  
Minshan Pei ◽  
Na Li
Keyword(s):  
Health Monitoring ◽  
Research And Practice ◽  
Long Span Bridges ◽  
Long Span ◽  
The Mainland Of China

Proposal for a Carbon Fibre Reinforced Composite Bridge across the Strait of Gibraltar at its Narrowest Site

1987 ◽  
Vol 201 (2) ◽  
pp. 73-78 ◽  
Author(s):  
U Meier
Keyword(s):  
Steel Structures ◽  
Strait Of Gibraltar ◽  
Long Span Bridges ◽  
Advanced Composites ◽  
Long Span ◽  
Reinforced Composite ◽  
Tremendous Progress ◽  
Composite Bridge ◽  
Materials Used ◽  
Cable Stayed Bridges

Tremendous progress has been made in the construction of long span bridges within the last two centuries. In this evolution structural concepts and strength of materials used have played key roles. The limiting span is defined as that span at which the structural system will just support itself. Comparison is made between limiting spans of cable-stayed bridges made of steel and of advanced composites. The use of advanced composites would allow the tripling of the limiting span in comparison to steel structures. To compare the quantities of material required for the cables of suspension and cable-stayed bridges, calculations are performed. The results are shown within a proposal for an advanced composites bridge across the Strait of Gibraltar.

Alternate Designs for Long Span Bridges

PCI Journal ◽  
1980 ◽  
Vol 25 (4) ◽  
pp. 48-58
Author(s):  
Felix Kulka
Keyword(s):  
Long Span Bridges ◽  
Long Span

Wind Buffeting in Time Domain Analysis of Long-Span Bridges using RM Bridge

2017 ◽  
Vol 109 (6) ◽  
pp. 3307-3317
Author(s):  
Afshin Hatami ◽  
Rakesh Pathak ◽  
Shri Bhide
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Long Span Bridges ◽  
Long Span

Inhibition kinetics for propionate degradation using propionate-enriched mixed cultures

1998 ◽  
Vol 38 (8-9) ◽  
pp. 443-451 ◽  
Author(s):  
S. H. Hyun ◽  
J. C. Young ◽  
I. S. Kim
Keyword(s):  
Phase I ◽  
Competitive Inhibition ◽  
Gas Production ◽  
Phase Iii ◽  
Utilization Rate ◽  
Inhibition Kinetics ◽  
Wide Range ◽  
Propionate Degradation ◽  
Acetate Utilization ◽  
Velocity Coefficient

To study propionate inhibition kinetics, seed cultures for the experiment were obtained from a propionate-enriched steady-state anaerobic Master Culture Reactor (MCR) operated under a semi-continuous mode for over six months. The MCR received a loading of 1.0 g propionate COD/l-day and was maintained at a temperature of 35±1°C. Tests using serum bottle reactors consisted of four phases. Phase I tests were conducted for measurement of anaerobic gas production as a screening step for a wide range of propionate concentrations. Phase II was a repeat of phase I but with more frequent sampling and detailed analysis of components in the liquid sample using gas chromatography. In phase III, different concentrations of acetate were added along with 1.0 g propionate COD/l to observe acetate inhibition of propionate degradation. Finally in phase IV, different concentrations of propionate were added along with 100 and 200 mg acetate/l to confirm the effect of mutual inhibition. Biokinetic and inhibition coefficients were obtained using models of Monod, Haldane, and Han and Levenspiel through the use of non-linear curve fitting technique. Results showed that the values of kp, maximum propionate utilization rate, and Ksp, half-velocity coefficient for propionate conversion, were 0.257 mg HPr/mg VSS-hr and 200 mg HPr/l, respectively. The values of kA, maximum acetate utilization rate, and KsA, half-velocity coefficient for acetate conversion, were 0.216 mg HAc/mg VSS-hr and 58 mg HAc/l, respectively. The results of phase III and IV tests indicated there was non-competitive inhibition when the acetate concentration in the reactor exceeded 200 mg/l.

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