Research and Analysis about the Effects of Curved Bar-Tied on Arch Bridge’s Structural Performance

2012 ◽  
Vol 226-228 ◽  
pp. 1567-1570 ◽  
Author(s):  
Shu Qing Zhao
Keyword(s):  
Calculation Model ◽  
Structural Performance ◽  
Highway Bridge ◽  
Arch Bridge ◽  
Model Studies ◽  
Finite Element Software ◽  
Different Types ◽  
Set Up ◽  
Tied Arch Bridge ◽  
Main Bridge

When designing under-supported bar-tied arch bridge, the type of bar-tied usually is straight. But sometimes based on design or the needs of some aspects, curved bar-tied is often used. Taking the main bridge of XinZhang highway bridge as the background, this paper, by using general finite-element software to set up calculation model, studies and analyzes the effects of different types of bar-tied on the arch bridge’s structural performance. Through the analysis, we know that it is not suitable to choose curved bar-tied for under-supported bar-tied arch bridge when designing and constructing.

scholarly journals Research on the key technology of TIED-arch bridge Incremental Launching Method Construction

2021 ◽  
Vol 30 (2) ◽  
Author(s):  
Kexin Zhang
Keyword(s):  
Finite Element ◽  
Simulation Analysis ◽  
Utilization Rate ◽  
Construction Process ◽  
Arch Bridge ◽  
Finite Element Software ◽  
Element Simulation ◽  
Material Utilization ◽  
Supporting Force ◽  
Tied Arch Bridge

Steel tied arch bridge has been widely used in modern bridge construction due to its beautiful shape, high material utilization rate and overall structural stiffness. However, there are few cases in which the tied-arch bridge is constructed by incremental launching . Based on the steel tied arch bridge project, this paper uses finite element software to establish the finite element simulation analysis of the construction process, and monitors the construction process of the bridge. The test results show that it is in the most unfavorable state when the cantilever at the end of the bridge reaches the maximum. At this time, the stress at the 117 m position of the beam reaches the maximum, the stress at the top edge is 33.7 MPa, and the stress at the bottom edge is -58.2 MPa. The stress in other sections did not exceed 30 MPa, and the beam was under uniform stress. When the foot of the internal arch passes through the temporary pier, the supporting force of the pier is maximum, which is about 6000 kN. The reasonable range of α is between 0.55 and 0.65, which is the ratio between the length Ln of launching nose and the maximum span L of incremental launching .

scholarly journals Research on the Arrangement Form of Net Suspenders with Constant Inclination Angle for Steel Box Tied Arch Bridge

2020 ◽  
Vol 165 ◽  
pp. 04039
Author(s):  
Teng Ma ◽  
Jingkai Zhao ◽  
Dafang Mei
Keyword(s):  
Finite Element ◽  
Inclination Angle ◽  
Bending Moment ◽  
Structural Stress ◽  
Arch Bridge ◽  
Finite Element Software ◽  
Reduction Efficiency ◽  
The Moment ◽  
Tied Arch Bridge ◽  
The Ideal

In order to explore the rational suspender layout of reticulated suspender steel box tied arch bridge, eight different suspender layout schemes were established by using finite element software Midas civil, taking a real bridge as the background and the constant inclination angle of suspender as the research variable. The structural stress characteristics of vertical suspender and reticulated suspender layout were analyzed and compared. The results show that the bending moment of arch rib and tied beam of reticulated suspender system is smaller, and the stress of arch beam is closer to the ideal state of “arch rib is compressed, tied beam is pulled”. The results show that in the range of 60 ~90, the smaller the inclination angle is, the more favorable the stress of the structure is, but the lower the moment reduction efficiency is when the inclination angle of the suspender is less than 60.

Self-Vibration Characteristics Analysis of the Yingzhou Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 1212-1215 ◽  
Author(s):  
Yan Zeng ◽  
Zhi Yong Wang
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Element Analysis ◽  
Arch Bridge ◽  
Subspace Iteration ◽  
Characteristics Analysis ◽  
Set Up ◽  
Three Dimensional Finite Element ◽  
Main Bridge

In this paper dynamic behavior of the Ying Zhou main bridge in Luoyang is studied .The finite element analysis software ANSYS is adopted to set up three-dimensional finite element model of a CFT arch bridge of the main bridge .The natural periods and modes of the CFT arch bridge are calculated by using the subspace iteration method. Meanwhile its modal characteristics are analyzed. Some useful conclusions are got by the calculation and analysis of the bridge for the engineering construction.

A Study of the Earthquake-Resistance Performance of Frame Structures with Different Types of Stairs

2013 ◽  
Vol 791-793 ◽  
pp. 510-513 ◽  
Author(s):  
Yu Ran ◽  
Wen Fei Kou ◽  
Guo Hua Xing
Keyword(s):  
Seismic Waves ◽  
Mechanical Performance ◽  
Time History ◽  
Structural Performance ◽  
Frame Structures ◽  
Analysis Method ◽  
Finite Element Software ◽  
History Analysis ◽  
Different Types ◽  
Resistance Performance

This paper uses time-history analysis method to consider the effect of 3 kinds of seismic waves by means of finite element software Ansys, analyse earthquake response of 5 kinds of models, compares effect of structural performance of frame structures with different types of stairs. The results show that different types of stairs diversely affects period, stiffness, mode of vibration, mechanical performance, etc, after consideration of stairs in calculating. Although types of stairs different, it shows mainly that stairs make much larger contribution for stiffness parallelled to stairs, less contribution for stiffness perpendicular to stairs, each layer just affects stiffness this layer. It is not simple to consider different types of stairs as general supports.

A New Monitoring Technology on Arch Bridge

2013 ◽  
Vol 401-403 ◽  
pp. 1187-1190
Author(s):  
Guo Zhi Tian
Keyword(s):  
Actual State ◽  
Construction Process ◽  
Monitoring Point ◽  
Monitoring Technology ◽  
Construction Monitoring ◽  
Arch Bridge ◽  
Long Span ◽  
Safety And Reliability ◽  
Tied Arch Bridge ◽  
Main Bridge

In order to make the actual state of the bridge into the ideal state of maximum, we make real-time monitoring in the key parts of the bridge, and adjust to the design of the data to ensure the safety and reliability of arch bridge in the course of construction. Combined with the construction monitoring of the Sihe Bridge, this paper introduces the main bridge construction process on the large span tied arch bridge. Based on the construction monitoring of Sihe Bridge, 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.

Dynamic Performance and Seismic Analysis of Tied Arch Bridge

2012 ◽  
Vol 446-449 ◽  
pp. 1119-1122 ◽  
Author(s):  
Hui Jun Wu ◽  
Wen Liang Qiu
Keyword(s):  
Finite Element ◽  
Seismic Waves ◽  
Seismic Analysis ◽  
Dynamic Performance ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Arch Bridge ◽  
Finite Element Software ◽  
Tied Arch Bridge ◽  
Dynamic Performance Analysis

Based on the anti-seismic research achievements of tired arch bridge at home and abroad, taking River City Bridge in Jilin as an example, a finite element model is established for dynamic performance analysis by general finite element software midas civil. Natural vibration characteristics of tied arch bridge are calculated as a basis for further dynamic calculation. Firstly, choose appropriate seismic waves according to the geological data. Then perform the dynamic response analysis of this bridge under different loading cases. Dynamic responses of this bridge under longitudinal and transverse seismic waves are studied respectively, and the influence of vertical seismic wave is also considered. It is shown that the influence on seismic response of vertical seismic waves is very obvious. The vertical seismic waves should be considered while doing seismic design of tied arch bridges.

Environmental model studies for the Istanbul master plan. Part I: hydrodynamical design basis and marine disposal of wastewater

1995 ◽  
Vol 32 (2) ◽  
pp. 141-148 ◽  
Author(s):  
I. S. Hansen ◽  
H. J. Vested ◽  
M. A. Latif
Keyword(s):  
Black Sea ◽  
Layer Structure ◽  
The Black Sea ◽  
Marmara Sea ◽  
Junction Area ◽  
3 Dimensional ◽  
Model Studies ◽  
Model Set ◽  
Characteristic Features ◽  
Set Up

A modelling study of the hydrodynamics and spreading of wastewater from existing and future outfalls in the Bosphorus region has been conducted applying a 3-Dimensional model. The modelling is based on SYSTEM 3, which is a general modelling system for baroclinic flow simulating unsteady currents, waterlevels, salinity and temperature within the model area. The model set-up covers the Black Sea-Bosphorus-Marmara Sea junction area. The set-up is calibrated by data from a dedicated field program and previous field experience. The model is designed to describe the characteristic features of the flow in the junction area such as the effects of variations in waterlevel differences between the Sea of Marmara and the Black Sea on the important two-layer structure in the strait and the flow fields generated by the upper layer jet in the Bosphorus-Marmara junction. This model has been applied for evaluation of disposal of wastewater and for the subsequent water quality studies. The general use of a baroclinic 3-D hydrodynamic model to simulate disposal of wastewater is discussed. Examples of the application of the model of the junction area to evaluate the different strategies for disposal of wastewater are presented.

Generalized calculation model of different types of optical multi-pass cells based on refraction and reflection law

2021 ◽  
Vol 139 ◽  
pp. 106958
Author(s):  
Ya-nan Cao ◽  
Zong Xu ◽  
Xing Tian ◽  
Gang Cheng ◽  
Cheng-jing Liu ◽  
...  
Keyword(s):  
Calculation Model ◽  
Different Types

Study on a Numerical Model of “Rainfall-Runoff” Process Combined with Snowmelt

2012 ◽  
Vol 518-523 ◽  
pp. 4273-4277
Author(s):  
Huang Jinbai ◽  
Wang Bin ◽  
Hinokidani Osamu ◽  
Kajikawa Yuki
Keyword(s):  
Numerical Method ◽  
Wave Theory ◽  
Large Error ◽  
Calculation Model ◽  
Surface Flow ◽  
Snow Melt ◽  
Rainfall Runoff ◽  
Surface Water Resources ◽  
Permissible Range ◽  
Set Up

In order to achieve the accurate calculation of “rainfall-runoff” process combined with snowmelt and to provide a useful numerical method for estimating surface water resources in a basin, a runoff numerical calculation model of “rainfall-runoff” process combined with snowmelt was developed for a distributive hydrological model. Numerical method on “Rainfall-runoff” process was set up by applying kinematic wave theory, and calculations on snowmelt were made using energy budget method. Validity of the model was verified through numerical simulation of the observed surface flow. Results of the error analysis indicated that a large error existed between the numerical results and the observed ones without considering snowmelt whereas the error was at the permissible range of criterion (< 3 %) by considering snowmelt. The results showed that the snowmelt calculation should be considered at snow melt area when performing the runoff calculation.

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