Research on Overall Stability of Concrete-Filled Steel Tubular Bowstring Arch Bridge

2011 ◽  
Vol 243-249 ◽  
pp. 1988-1994 ◽  
Author(s):  
Zi Lin Li ◽  
Pei Yuan Zhou
Keyword(s):  
Finite Element ◽  
Steel Tube ◽  
Construction Process ◽  
Ansys Software ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Overall Stability ◽  
The Stability ◽  
Tied Arch Bridge ◽  
Element Theory

Based on the finite element theory, the computational model, one through concrete filled steel tube tied-arch bridge was established under the considerations of both geometrical non-linearity and material non-linearity. And using the ANSYS software to study the bridge's arch rib construction process and the overall stability after the complete construction, the results show that the full-bridge’s stability coefficient are larger than other concrete-filled steel tube arch bridge; the in-plane stiffness is larger than the out-plane stiffness, and the influence of material non-linearity on the stability is notable. The results provide a good reference for the similar bridge's design and construction.

The Analysis of Double-Nonlinearity Stability of Concrete Filled Steel-Tube Arch Bridge

2013 ◽  
Vol 724-725 ◽  
pp. 1709-1713 ◽  
Author(s):  
Xing Han ◽  
Bing Zhu ◽  
Gui Man Liu ◽  
Jun Ping Wang ◽  
Bao Shan Xiang
Keyword(s):  
Finite Element ◽  
Nonlinear Analysis ◽  
Steel Tube ◽  
Eigenvalue Analysis ◽  
Finite Element Program ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Element Program ◽  
Load Displacement ◽  
The Stability

Taking a concrete-filled steel tube arch bridge with a span of 80m for example, the paper studies the stability of this bridge by using the general finite element program. The analysis introduces the method to deal with the stability of these bridges by FEM, also demonstrates the result of the eigenvalue analysis and dual nonlinear analysis according to an example. In eigenvalue analysis, the influence of the brace and the X-brace to this arch bridge`s stability are compared under different load cases; in dual nonlinear analysis, the load-displacement curves of three different load cases of the rib failure are given. All of these are some valuable to the stability of the concrete-filled steel tube arch bridge.

Stability Analysis of Single-Track Railway Long Span Combination Bridge of Arch and Beam

2011 ◽  
Vol 383-390 ◽  
pp. 6079-6084
Author(s):  
Ri Chen Ji ◽  
Jun He ◽  
Ming Xing Shi
Keyword(s):  
Stability Analysis ◽  
Steel Tube ◽  
Material Nonlinearity ◽  
Stability Factor ◽  
Single Track ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Long Span ◽  
The Stability ◽  
Tied Arch Bridge

For the single-track railway concrete-filled steel tube tied-arch bridge, since restrictions of the bridge width will inevitably lead to a relatively smaller ratio of width to span using long span.The stability is a very prominent issue in design and construction. Taking a 136m span through concrete filled steel tube tied-arch bridge as an object, considering the influence of geometric and material nonlinearity of arch rib, its space stability analysis of the whole bridge is made using finite element program. Its stability factor and the instabil-ity mode are given under the most unfavourable load condition. Instability of the structure is mainly shown in out-plane instability of arch rib. Elastic buckling factor is greater than the general requirement, which satisfies the requirement of the bridge elastic stability. The effect of geometric nonlinearity on stability of the bridge is smaller while the effect of material nonlinearity is greater, which should be considered in the stability analysis of long span arch bridge. After the arch ribs are progressively loaded, the ultimate loads of the arch ribs are obtained. Effects and variation law of transverse brace layout, arch rib inclination angle and ratio of height to span of the arch to the stability of this bridge are revealed.

scholarly journals Artificial Neural Network-Based Method for Seismic Analysis of Concrete-Filled Steel Tube Arch Bridges

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Zhen Liu ◽  
Shibo Zhang
Keyword(s):  
Neural Network ◽  
Finite Element Method ◽  
Artificial Neural Network ◽  
Finite Element ◽  
Seismic Analysis ◽  
Steel Tube ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Cfst Arch Bridge ◽  
Artificial Neural

Seismic analysis of concrete-filled steel tube (CFST) arch bridge based on finite element method is a time-consuming work. Especially when uncertainty of material and structural parameters are involved, the computational requirements may exceed the computational power of high performance computers. In this paper, a seismic analysis method of CFST arch bridge based on artificial neural network is presented. The ANN is trained by these seismic damage and corresponding sample parameters based on finite element analysis. In order to obtain more efficient training samples, a uniform design method is used to select sample parameters. By comparing the damage probabilities under different seismic intensities, it is found that the damage probabilities of the neural network method and the finite element method are basically the same. The method based on ANN can save a lot of computing time.

scholarly journals Dynamic Response of a Long-Span Concrete-Filled Steel Tube Tied Arch Bridge and the Riding Comfort of Monorail Trains

2018 ◽  
Vol 8 (4) ◽  
pp. 650 ◽  
Author(s):  
Hongye Gou ◽  
Wen Zhou ◽  
Changwei Yang ◽  
Yi Bao ◽  
Qianhui Pu
Keyword(s):  
Dynamic Response ◽  
Steel Tube ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Long Span ◽  
Tied Arch Bridge

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 Construction Simulation Analysis of 60m-span Concrete Filled Steel Tube arch bridge

2018 ◽  
Vol 38 ◽  
pp. 03056
Author(s):  
Jing Xian Shi ◽  
Qing Hua Ding
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Internal Force ◽  
Steel Tube ◽  
Construction Simulation ◽  
Construction Process ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Three Dimensional Finite Element ◽  
Main Arch

The construction process of the CFST arch bridge is complicated. The construction process not only affects the structural stress in the installation, but also determines the form a bridge and internal force of the bridge. In this paper, a 60m span concrete filled steel tube tied arch bridge is taken as the background, and a three-dimensional finite element simulation model is established by using the MIDAS/Civil bridge structure analysis software. The elevation of the main arch ring, the beam stress, the forces in hanger rods and the modal frequency of the main arch during the construction stage are calculated, and the construction process is simulated and analyzed. Effectively and reasonably guide the construction and ensure that the line and force conditions of the completed bridge meet the design requirements and provides a reliable technical guarantee for the safe construction of the bridge.

Research on the Stability of Erecting of Pre-Cast Segmental Box Girders with SPZ1300/48 Gantry

2010 ◽  
Vol 163-167 ◽  
pp. 828-833
Author(s):  
Zhi Xing Sun ◽  
Shi Tong Chen ◽  
Hong Wei Xu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Transition Process ◽  
Construction Process ◽  
Box Girders ◽  
Overall Stability ◽  
Strong Winds ◽  
Bad Weather ◽  
The Stability ◽  
Element Method

In the present paper the whole structure and the construction process of SPZ1300/48 gantry is introduced and the stability of the gantry under lifting process and transition process is also analyzed by some reliable finite element method software. By the analysis of the overall stability of the structure, taking into account the bad weather (strong winds) in the region, in the case of lifting process and after the segments placed, the optimal lifting sequence of the beam segments on account of the stability of the structure itself is obtained. By this way a useful sample for analysis of similar systems is provided, and then a technical foundation is established for bridge constructions by segmental assembling method for larger span or tonnage.

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