Study on the Vehicle-Bridge Coupling Vibration of Steel Arch Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 233-238
Author(s):  
Zi Lin Li ◽  
Pei Yuan Zhou ◽  
Zhen Bo Yun
Keyword(s):  
Test Results ◽  
Coupling Vibration ◽  
Vibration Period ◽  
Dynamic Displacement ◽  
Arch Bridge ◽  
Finite Element Software ◽  
Long Span ◽  
Data Processing Software ◽  
New Type ◽  
Arch Bridges

The modal analysis and the calculation of dynamic response of the Fenghua Bridge, a new type of long-span steel arch bridge, are carried out using the finite element software ANSYS. Through the on-site testing, the vibration frequency and the change of dynamic displacement response with different weight and speeds are obtained by the DASP data processing software. It is found that the field test results are in consistent with the theoretical results. Firstly, the natural vibration period is 2 ~ 3 times longer than the other ordinary arch bridges, which indicate the bridge structure is stable; Secondly, the dynamic displacement of bridge deck changes in the same direction with weight, while in the opposite direction with speed, and the maximum appears on the midpoint of the middle span; Finally, the maximum dynamic displacement is 11.41mm, which doesn’t exceed the allowable value. So it can be concluded that the bridge is safe under the vehicle-bridge coupling vibration.

Seismic Response Analysis of CFST Arch Bridge Considering Input Earthquake Characteristics

2011 ◽  
Vol 255-260 ◽  
pp. 962-966
Author(s):  
Fan Xing ◽  
Lin Zhao ◽  
Ya Zhe Xing
Keyword(s):  
Seismic Response ◽  
Research Result ◽  
Steel Tube ◽  
Response Analysis ◽  
Vibration Period ◽  
Arch Bridge ◽  
Near Fault ◽  
Long Span ◽  
Cfst Arch Bridge ◽  
Out Of Plane

In view of huge destructibility of the near-fault ground motions, structures with long natural vibration period are liable to fall into nonlinear reaction stage. Based on a full understanding of the near-fault seismic spectrum characteristics, the out-of-plane seismic response of a long span concrete-filled steel tube (CFST) arch bridge was studied in depth, and the research result could offer a reference for near-fault aseismic design.

Practical Calculation of Cable-Stayed Arch Bridge Lateral Stability

2014 ◽  
Vol 587-589 ◽  
pp. 1586-1592 ◽  
Author(s):  
Wei Lu ◽  
Ding Zhou ◽  
Zhi Chen
Keyword(s):  
Calculation Method ◽  
Practical Calculation ◽  
Lateral Stability ◽  
Bridge Structure ◽  
Construction Process ◽  
Energy Principle ◽  
Arch Bridge ◽  
Long Span ◽  
Arch Bridges ◽  
Cable Stayed Bridges

A long-span cable-stayed arch bridge is a new form of bridge structure that combines features of cable-stayed bridges with characteristics of arch bridges. In the present study, we derived a practical calculation method for the lateral destabilization critical loading of cable-stayed arch bridges during the construction process based the energy principle. The validity of the method was verified with an example. The calculation method provides a quick and efficient way to evaluate the lateral stability of a cable-stayed arch bridge and a concrete filled steel tubular arch bridge during the construction process.

Rush Repair Method and Suggestion of Long-Span Arch Bridge in Wartime

2012 ◽  
Vol 538-541 ◽  
pp. 3211-3214
Author(s):  
Li He ◽  
Yong Jiu Qian
Keyword(s):  
Damage Assessment ◽  
Research Work ◽  
Blast Loading ◽  
Arch Bridge ◽  
Repair Method ◽  
Long Span ◽  
Future War ◽  
Arch Bridges ◽  
Damage Condition ◽  
Modern War

The enemies pay much attention to the opponent significant bridge in modern war and future war. A number of long-span arch bridges are damaged by blast loading. According to the damage condition and damage assessment of long-span arch bridge subjected to blast loading, a variety of methods suitable for rush repair in wartime are summarized, the rationalization proposals of enhancing anti-blast ability of long-span arch bridge are proposed. The research work is meaningful for the rush repair of long-span arch bridge.

MR Damper Semiactive Control for Bridge under Multi-Support Seismic Excitation

2011 ◽  
Vol 90-93 ◽  
pp. 1402-1405 ◽  
Author(s):  
Zheng Ying Li ◽  
Peng Peng Dang ◽  
De Jian Mu
Keyword(s):  
Traveling Wave ◽  
Seismic Excitation ◽  
Semiactive Control ◽  
Linear Quadratic ◽  
Arch Bridge ◽  
Long Span ◽  
Control Scheme ◽  
Wave Effects ◽  
Arch Bridges ◽  
Magneto Rheological

For vibration control of long-span arch bridges under multi-support seismic excitation, this paper presents schemes of control to seismic responses of arch bridges with Magneto-Rheological dampers(MRD). In the semi-active control system of arch bridge-MRD, Linear Quadratic Gaussian (LQG)-based Sign function control algorithm is used to command MRD，and traveling wave effects on the responses of structure are considered. The Nimu arch bridge is used as a simulation example to verify the proposed control scheme. Numerical results show that traveling wave effects have no unfavorable influence on the control to response of arch bridge.

Safety Assessment and Strengthening for Long Span Double-Curved Arch Bridge with Design Drawing Lost

2014 ◽  
Vol 501-504 ◽  
pp. 1301-1304 ◽  
Author(s):  
Li Li
Keyword(s):  
High Performance ◽  
Safety Assessment ◽  
Work Condition ◽  
West China ◽  
Arch Bridge ◽  
Long Span ◽  
Arch Bridges ◽  
Design Proposal ◽  
Non Destructive ◽  
Design Drawing

There are many old damaged double-curved arch bridges with design drawing lost serviced for more than 40 years are still used in West China. Based on the repair and improving the carrying capacity work of a damaged badly double-curved arch bridge whose design drawing is lost with main span of 41.0m constructed in 1962 in Sichuan province of China, health inspecting and safety assessment for this type bridge using non-destructive methods is studied. Then the strengthening design of filling concrete and enlarging the section method is proposed. High performance self-dense slight-expansion concrete and embedded bar techniques are applied in strengthening construction. After the strengthening work completed, the arch bridge is still in very good work condition experienced two devastating disasters of the 2008 Sichuan Wenchuan and the 2013 Sichuan Lushan earthquake, with the distance of bridge site to epicenter less than 100km, which proved the safety assessment and the strengthening design proposal are effective and feasible.

Test Study of Compressive Strength of High-Strength Stone Masonry

2011 ◽  
Vol 71-78 ◽  
pp. 3794-3799
Author(s):  
Da Lin Hu ◽  
Long Gang Chen ◽  
Feng Chen
Keyword(s):  
Compressive Strength ◽  
High Strength ◽  
Stone Masonry ◽  
Test Results ◽  
Aggregate Concrete ◽  
Long Span ◽  
Test Study ◽  
Compressive Strength Test ◽  
Concrete Joints ◽  
Arch Bridges

Stone masonry with micro-aggregate concrete joints has been widely used in long span arch bridges in China. However, the mechanical properties of this kind of high-strength masonry have been seldom studied. This paper presents compressive strength test study of eight groups of masonry specimens, which consist of C30 or C40 micro-aggregate concrete joints and five kinds of dressed stone blocks. The masonry mechanical behavior is described and test results are analyzed. An empiric formula of the masonry compressive strength is obtained. Finally, design value of masonry compressive strength is assessed and discussed.

Local stability of concrete arch bridge based on Ritz method

2021 ◽  
pp. 1-16
Author(s):  
Jiansheng Tong ◽  
Zhengyuan Lin ◽  
Qian Zhou
Keyword(s):  
Ritz Method ◽  
Local Buckling ◽  
New Method ◽  
Radius Of Gyration ◽  
Limit Values ◽  
Arch Bridge ◽  
Finite Element Software ◽  
Equivalent Strut ◽  
Thin Walled ◽  
Arch Bridges

In order to minimize the self-weight and prevent local buckling failure of thin-walled box concrete arch bridges at the same time, the limit values of width-thickness ratios are deduced based on Ritz method and equivalent strut theory of arch bridge. A new method of determining sectional forms based on the limit values of width-thickness ratios is put forward. Based on Mupeng bridge, the theoretical results are verified by finite element software ANSYS. Results show that the limits of width-thickness ratios are related to concrete grade, equivalent calculation length and radius of gyration, the allowable minimum thickness of Mupeng bridge is 15 cm to avoid local buckling. The limit values of width-thickness ratios deduced in this paper are reasonable and this new method of determining sectional forms is simple and rational to apply in engineering. A scientific engineering calculation method on arch ring design is put forward and it can provide a theoretical basis for the design of thin-walled box concrete arch bridges constructed by cantilever pouring.

Method of Damage Evaluation of Long-Span Arch Bridge Subjected to Blast Loading

2012 ◽  
Vol 178-181 ◽  
pp. 2405-2411
Author(s):  
Li He ◽  
Yong Jiu Qian
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Theory ◽  
Highway Bridges ◽  
Fuzzy Comprehensive Evaluation ◽  
Technical Condition ◽  
Damage Evaluation ◽  
Arch Bridge ◽  
Long Span ◽  
Arch Bridges

A variety of conventional weapons equipped with explosive are used to destroy the significant long-span arch bridge. Because of the special function of the weapons and the complexity of the arch bridge, the damage results with the features of uncertainty and fuzzy are assessed with fuzzy theory. Combined with the standards for technical condition evaluation of highway bridges and wartime specific requirements, the fuzzy mathematical model based on the fuzzy mathematics theory and method is established to judgment comprehensively the arch technical condition. The hirarchy fuzzy comprehensive evaluation method is applied to determine the technical state grade of the damaged arch bridge. The method of damage evaluation provides the effective reference for the emergency repairmen of the arch bridges.

Study of Dynamic Characteristic of Friendship Avenue Bridge

2011 ◽  
Vol 311-313 ◽  
pp. 1305-1308
Author(s):  
Wei He ◽  
Rong He ◽  
Sheng Tai Yan
Keyword(s):  
Boundary Condition ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Dynamic Characteristic ◽  
Dynamic Characteristics ◽  
Steel Tube ◽  
Wind Resistance ◽  
Finite Element Software ◽  
Long Span ◽  
New Type

Friendship Avenue bridge was a concrete-filled steel tube arch bridge (CFSTAB). As a new type of bridge, CFSTAB was widely constructed and rapid developed in China. Because of its merits, CFSTAB was constructed much more in China. With the span increasing rapidly, and the bridge gradually becoming thin, the long span CFSTAB should be paid more attention for its performance of aseismic, wind resistance and vehicle-bridge vibration.This article described the basic method of dynamic analysis for CFSTAB. And the Friendship Avenue CFSTAB was taken as an example, such as the choice of element types, conducted boundary condition and applying load were described in process of modeling FEM for it, and of which the dynamic characteristics was analyzed by finite element software ANSYS.

Sensitivity Analysis on Dynamic Properties of Large Span Concrete-Filled Steel Tube Arch Bridge

2012 ◽  
Vol 204-208 ◽  
pp. 1976-1979
Author(s):  
Hang Sun ◽  
Xiao Jian Han ◽  
Xiu Yun Gao
Keyword(s):  
Dynamic Properties ◽  
Steel Tube ◽  
Design Parameters ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Space Model ◽  
Long Span ◽  
Current Design ◽  
Arch Bridges ◽  
The Impact

The calculation formula of the vertical fundamental frequency of arch bridge has been given in current design codes, in which the rise-span ratio is the only variable on condition that the structure mass and stiffness are known. However, the dynamic properties of long-span concrete filled steel tube arch bridges have their own characteristics, which are influenced by a series of factors. Thus this article establishes a space model of a concrete-filled steel tube arch bridge. By analyzing the main design parameters’ influence on the structure dynamic properties, including rise-span ratios, arch-axis coefficient and wide-span ratios, some of conclusions has been made, which can be used for further research of the impact effect and earthquake dynamic response, and provide the necessary basis for the dynamic design of bridges of this kind

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