Emulational Calculation of Concrete Perfusion in Steel-Pipe Arch Rib of a Large-Span Bridge

2011 ◽  
Vol 71-78 ◽  
pp. 1488-1494
Author(s):  
Ying Hua Bai ◽  
Mu Yu Liu ◽  
Tian Qing Yu
Keyword(s):  
Steel Pipe ◽  
Structural Deformation ◽  
Structural Safety ◽  
Arch Bridge ◽  
Large Span ◽  
Commercial Package ◽  
Structural Responses ◽  
Bearing Force ◽  
Deformation Stress ◽  
Force Characteristics

The bridge is a half-through steel-pipe concrete arch bridge with uniform catenary. Based on sufficiently considering the principle of symmetrically loading rib concrete, the pouring process of the whole concrete is calculated with emulation with the aiding of commercial package MIDAS/Civil. By analyzing the structural deformation, stress and stability, the structural responses such as the structural distortion deformation, bearing-force characteristics and stability coefficients at different construction stages are computed in this study. The motivation of this investigation is to ensure the structural safety, and the structural security can also be discussed. The made observations indicate that the whole bridge has a high safety in either construction or operation and the achievement of research may provide reference for the similar arch bridge.

Emulational Analysis of Concrete Pouring in Steel-Pipe Arch Rib of Fei Shuiya Bridge

2010 ◽  
Vol 39 ◽  
pp. 136-139
Author(s):  
Xiao Chun Fan
Keyword(s):  
Reference Value ◽  
Structural Distortion ◽  
Steel Pipe ◽  
Arch Bridge ◽  
Stabilization Coefficient ◽  
Bearing Force ◽  
Force Characteristics

Fei Shuiya Bridge is a half-through steel-pipe concrete arch bridge with uniform catenary. Based on sufficiently considering the principle of symmetrically loading rib concrete, the pouring process of concrete is calculated through MIDAS/Civil 6.71. Structural distortion, bearing-force characteristics and stabilization coefficient of each phase are given. Structural security is discussed too. Conclusions have a certain reference value for the same bridge in pouring the rib concrete.

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.

scholarly journals Research on Construction Monitoring of Large-Span Steel Pipe Truss Structure

2019 ◽  
Vol 09 (04) ◽  
pp. 255-267
Author(s):  
Kongliang Chen ◽  
Guoqing Yuan ◽  
Liankun Wang ◽  
Wenzhi Zhang ◽  
Xiaoke Wang
Keyword(s):  
Truss Structure ◽  
Steel Pipe ◽  
Construction Monitoring ◽  
Large Span

scholarly journals Analysis of temperature-induced deformation and stress distribution of long-span concrete truss combination arch bridge based on bridge health monitoring data and finite element simulation

2020 ◽  
Vol 16 (10) ◽  
pp. 155014772094520
Author(s):  
Yanwei Niu ◽  
Yong’e Wang ◽  
Yingying Tang
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Stress Distribution ◽  
Health Monitoring ◽  
Three Dimensional ◽  
Monitoring Data ◽  
Temperature Fields ◽  
Structural Deformation ◽  
Arch Bridge ◽  
Bridge Health Monitoring

Through decades of operation, deformation fluctuation becomes a central problem affecting the normal operating of concrete truss combination arch bridge. In order to clarify the mechanism of temperature-induced deformation and its impact on structural stress distribution, this article reports on the temperature distribution and its effect on the deformation of concrete truss combination arch bridge based on bridge health monitoring on a proto bridge with 138 m main span. The temperature distribution and deformation characteristics of the bridge structure in deep valley area are studied. Both of the daily and yearly temperature variation and structural deformation are studied based on bridge health monitoring. Using the outcome of monitoring data, three-dimensional solid finite element models are established to analyze the mechanism of temperature-induced deformation of the whole bridge under different temperature fields. The influence of temperature-induced effect is discussed on local damage based on the damage observation of the background bridge. The outcome of comparisons with field observation validates the analysis results. The relevant monitoring and simulation result can be referenced for the design and evaluation of similar bridges.

scholarly journals Numerical Analysis of Influence of the Hull Couple Motion on the Propeller Exciting Force Characteristics

2019 ◽  
Vol 7 (10) ◽  
pp. 330 ◽  
Author(s):  
Li ◽  
Zhou ◽  
Liu ◽  
Wang
Keyword(s):  
Exciting Force ◽  
Hydrodynamic Performance ◽  
Navier Stokes ◽  
Fluctuating Pressure ◽  
Frequency Peak ◽  
Couple Motion ◽  
Disk Plane ◽  
Bearing Force ◽  
Force Characteristics ◽  
Motion Amplitude

The numerical calculation was performed for the KRISO Container Ship (KCS) hull-propeller-rudder system with different freedom hull motion by employing the Reynolds-Averaged Navier-Stokes (RANS) method and adopting the overset grid. Firstly, the numerical simulation of hydrodynamics for a bare hull with the heave and pitch motion is carried out. The results show that the space non-uniformity of a nominal wake in the disk plane with motion is comparable to the case without motion. However, the time non-uniformity increases sharply and it has a significant positive relationship with the motion amplitude. Then, the propeller exciting force is calculated in the case including single heave, single pitch and their couple motion. It was found that both the ship and propeller hydrodynamic performance deteriorated dramatically due to the hull motion. Furthermore, the spectrum peak at the motion frequency is dominant in all the peak values and the larger the amplitude is, the higher the motion frequency peak is expected to be. For the propeller bearing force, the effect of the different hull motions appears as linear superimposition. However, the superimposition of different hull motions enlarges the propeller-induced fluctuating pressure in a single motion.

Detection and Evaluation of Ling Bridge in Ningbo

2015 ◽  
Vol 744-746 ◽  
pp. 850-854
Author(s):  
Bo Shan Zhang ◽  
Jun Xu
Keyword(s):  
Visual Inspection ◽  
Status Quo ◽  
Structural Deformation ◽  
Normal Operation ◽  
Bridge Structure ◽  
Arch Bridge ◽  
Trunk Road ◽  
The Status ◽  
Status Assessment

Ling Bridge in Ningbo, a province-protected historic relic in Zhejiang, is the only three-hinged steel arch bridge existing in China as well as the first modern steel arch bridge co-constructed by Chinese engineers and foreign engineers in 1936. For over 70 years the bridge has served as an important transportation node on urban trunk road, bearing significant traffic pressure. It is necessary to have its status quo detected and its safe use evaluated to sustain normal operation of the bridge. The status assessment of the bridge is conducted in the following aspects: first, visual inspection was applied to check types of existing diseases and to estimate their threat degrees to the bridge; then, spatial linear examination was applied to detect structural deformation and to calculate whether there exists a instability hazard; finally, strength and fatigue calculation was made to determine safety degree of the bridge structure.

Simulation Study of the Whole Process of Collapse and Collision of a Large-Span Steel Single-Layer Lattice Structure

2011 ◽  
Vol 308-310 ◽  
pp. 2368-2373
Author(s):  
Dong Ya An ◽  
Cheng Ming Li
Keyword(s):  
Performance Analysis ◽  
Lattice Structure ◽  
Single Layer ◽  
Large Earthquake ◽  
Structural Safety ◽  
The Sun ◽  
Displacement Effect ◽  
Large Span ◽  
Whole Process ◽  
Earthquake Action

The project Expo Axis is one of the landmark buildings of Expo Shanghai 2010, and its structural safety depends largely on the security of the six Sun Valleys, which are the important components of the Expo Axis. The simulation of the whole process of collapse and collision of the sun valley under earthquake action is conducted in this article. In the calculation multiple nonlinear factors are taken into account, such as material nonlinearity, large displacement effect, self-contact collision among the structure members, contact collision between the structure and the ground, etc. Through analyzing the results, a reasonable assessment of the structure of Sun Valley’s performance under the supper-large earthquake is given out. This method can also offer reference to other similar large-span steel single-layer lattice structure’s performance analysis.

Damage Inspection and Assessment on a Transmission Angle Tower in Coastal Areas

2013 ◽  
Vol 671-674 ◽  
pp. 650-654
Author(s):  
Peng Yun Li ◽  
Bo Chen ◽  
Yu Zhou Sun
Keyword(s):  
Structural Model ◽  
Wind Loading ◽  
Transmission Tower ◽  
Line System ◽  
Steel Material ◽  
Transmission Angle ◽  
Commercial Package ◽  
Loading Effects ◽  
Structural Responses ◽  
Element Approach

The field inspection and safety assessment of a transmission angle tower are actively carried out in this study. The field measurement and inspection are firstly introduced and then the structural model is constructed based on finite element approach with the aiding of commercial package ANSYS. The equation of motion of the transmission tower-line system is established for numerical analysis. The gravity, base settlement and dynamic wind loading are applied on the tower to examine the structural responses. The deformation and stresses distribution of the transmission angle tower are computed to explore the damage reasons. The made observations indicate that the peak stresses of some members are large than the permitted yielding stresses of steel material. The damage event is induced by coupling loading effects

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