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.

Ultimate Bearing Capacity Analysis of Long-Span Continuous Stone Arch Bridge

2011 ◽  
Vol 71-78 ◽  
pp. 3800-3805
Author(s):  
Da Lin Hu ◽  
Kai Jiang ◽  
Qi Xin Sun ◽  
Lin Han
Keyword(s):  
Bearing Capacity ◽  
Safety Assessment ◽  
Ultimate Bearing Capacity ◽  
Failure Characteristics ◽  
Arch Bridge ◽  
The Past ◽  
Long Span ◽  
Arch Bridges ◽  
Mechanical Performances ◽  
Main Arch

In the past 50 years, many long-span continuous stone arch bridges have been built in China. Analysis of mechanical performances and load capacities of long-span continuous stone arch bridges has important significances for the safety assessment of the similar bridges. 3D elastoplastic finite element method is employed to analyze ultimate bearing capacity of a three-span arch bridge with sandstone masonry in this paper. The characteristics of structural geometric and material nonlinearities and cracking and crushing of the masonry are taken into account. Compared with single-span arch bridge, both the coaction of spandrel structure and main arch and the influence of loading arrangements on ultimate bearing capacity is analyzed. The failure characteristics of the structure under the ultimate load are also introduced. The analysis results and conclusions can be referenced for the safety assessment of similar bridges.

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.

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.

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

Study on Transverse Synchronization Control for Super-Breadth and Long-Span Basket Handle Arch Bridge when Vertically Rotating

2013 ◽  
Vol 438-439 ◽  
pp. 917-922
Author(s):  
Zhi Wei Sun ◽  
Xiao Guang Wu
Keyword(s):  
Steel Tube ◽  
Synchronization Control ◽  
The Finite Element Method ◽  
Arch Bridge ◽  
Long Span ◽  
Maximum Value ◽  
Cfst Arch Bridge ◽  
The Difference ◽  
Arch Bridges ◽  
Main Arch

Monitoring and controlling of vertical construction for main arch ribs is most important for concrete-filled steel tube (CFST) arch bridges due to high risk. Controlling the difference of elevation between the two main arch ribs has direct influence on the mechanical behavior of lateral brace, towers and temporary hinges at arch abutments of main piers. Therefore, transverse synchronization control is the main priority in vertical rotating construction phase. Taking a half-through CFST arch bridge in Shijiazhuang City as an example, this paper make a study of transverse synchronization control of the two main arch ribs during vertical rotation. The finite element method (FEM) software-Midas is employed to simulate the main arch ribs in rotation construction phase, and maximum value of the difference of elevation between the two main arch ribs is obtained to offer reference and basis of vertical rotation construction of this bridge.

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.

Deflection distribution estimation of the main arch of arch bridges based on long-gauge fiber optic sensing technology

2019 ◽  
Vol 22 (15) ◽  
pp. 3341-3351
Author(s):  
Qingqing Zhang ◽  
Tongfei Sun ◽  
Jing Wang ◽  
Qianlong Liu
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Optic ◽  
Bragg Grating ◽  
Arch Bridge ◽  
Long Span ◽  
Distribution Estimation ◽  
Sensing Technology ◽  
Fiber Optic Sensing ◽  
Arch Bridges ◽  
Main Arch

Deflection of the main arch of arch bridges is one of the main indices for supporting the alignment after construction and evaluating the structural performance. The existing sensing technology and analysis method for deflection monitoring have developed, but it is still difficult to monitor the deflection of the main arch of a long-span arch bridge with great height difference between measuring points. On the contrary, in recent years, with the outstanding advantages of fiber optic sensing technologies, a long-gauge fiber Bragg grating sensing technology has been used in structural health monitoring due to its characteristics, including reflecting the macro and micro information and being connected into network. For these reasons, the long-gauge fiber Bragg grating sensing technology is proposed to develop a method to monitor the deflection of the main arch of arch bridges. A curvature load method for deflection distribution estimation using strain measurements is proposed. It deduces the expression of the complex relation between the strain and the deformation on the main arch element and then separates the coupled strain on the element through the specific sensor layout. A series of simulation tests of the deck arch bridge, half-through bridge, and through arch bridge was conducted. It is concluded that the proposed method can not only be applied to these long-span arch bridges but also can identify the static and dynamic deflections of the main arch effectively.

Reasonable Elevation Calculation of Temporary Pier of Long-Span Steel Trussed Arch Bridges with Semi-Cantilever

2014 ◽  
Vol 501-504 ◽  
pp. 1318-1322
Author(s):  
Xu Luo ◽  
Lu Rong Cai
Keyword(s):  
Significant Influence ◽  
Construction Method ◽  
Bridge Construction ◽  
Arch Bridge ◽  
Long Span ◽  
Building Process ◽  
Steel Truss ◽  
Arch Bridges ◽  
Beam Bridge

When the scaffold construction method is applied on long-span steel trussed arch bridges, reasonable setting of the temporary pier elevation has significant influence on assembly linearis and safety assembly of long-span steel trussed arch bridges with semi-cantilever. In this paper, in accordance with the manufacturing linearis steel trussed beam bridge and steel truss beam linearis changing during building process, the calculation of temporary pier elevation was studied systematically, and practical function was deduced. Then, the method was applied to a long-span steel trussed arch bridge. The obtained result by in-situ assembly and dismantling presents that: 50 mm preserved method is considered in this paper, which can provide convenience for removing the temporary pier. At the same time, the rationality and reliability of the presented approach are verified. It also can provide reference for similar bridge construction.

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