scholarly journals Fatigue Performance Assessment of Composite Arch Bridge Suspenders Based on Actual Vehicle Loads

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Bin Chen ◽  
Xiaozhang Li ◽  
Xu Xie ◽  
Zheng Zhong ◽  
Pengzhen Lu
Keyword(s):  
Amplitude Spectrum ◽  
Element Model ◽  
Bridge Engineering ◽  
Fatigue Performance ◽  
Stress Process ◽  
Arch Bridge ◽  
Vehicle Data ◽  
Gross Vehicle Weight ◽  
Cable Force ◽  
Arch Bridges

In the through arch bridges, the suspenders are the key components connecting the arch rib and the bridge deck in the middle, and their safety is an increasing focus in the field of bridge engineering. In this study, various vehicle traffic flow parameters are investigated based on the actual vehicle data acquired from the long-term structural health monitoring system of a composite arch bridge. The representative vehicle types and the probability density functions of several parameters are determined, including the gross vehicle weight, axle weight, time headway, and speed. A finite element model of the bridge structure is constructed to determine the influence line of the cable force for various suspenders. A simulated vehicle flow, generated using the Monte Carlo method, is applied on the influence lines of the target suspender to determine the stress process, and then the stress amplitude spectrum is obtained based on the statistical analysis of the stress process using the rainflow counting method. The fatigue performance levels of various suspenders are analyzed according to the Palmgren-Miner linear cumulative damage theory, which helps to manage the safety of the suspenders.

Study of Reinforcing Mechanism of Rigid-Frame Arch Bridge Based on Static and Dynamic Analysis

2011 ◽  
Vol 219-220 ◽  
pp. 458-462
Author(s):  
Ze Ying Yang ◽  
Xi Bin Zhang ◽  
Jian Bo Qu
Keyword(s):  
Dynamic Properties ◽  
Element Model ◽  
Reinforcement Scheme ◽  
Arch Bridge ◽  
3 Dimensional ◽  
Static And Dynamic Analysis ◽  
Rigid Frame ◽  
Dimensional Finite Element ◽  
Arch Bridges ◽  
The Relationship

According to Dawenkou bridge, a seriously deteriorated rigid-frame arch bridge, typical deteriorations of rigid-frame arch bridges were summarized. Based on 3-dimensional finite element model of a rigid-frame arch bridge, the relationship between dynamic properties and deteriorations of the structure, especially the influence of lateral tie system on the dynamic properties of the structure was analyzed. The results show that, damages of lateral tie system in operation induced premature appearance of lateral vibration directly; however, the large curvature torsion of deck obviously should take the mainly responsibility of damages of lateral tie system. According to the above analysis, the corresponding reinforcement scheme and specific measures were proposed.

scholarly journals Structural Optimization of Network Arch Bridges with Hollow Tubular Arches and Chords

2018 ◽  
Vol 12 (2) ◽  
pp. 36
Author(s):  
Alessio Pipinato
Keyword(s):  
Structural Analysis ◽  
Structural Optimization ◽  
Bridge Engineering ◽  
Structural Safety ◽  
Arch Bridge ◽  
Railway Bridges ◽  
Cable Structure ◽  
Arch Bridges ◽  
High Level

In the framework of bridge engineering, cable structure represent a key argument. The development of innovative bridge solutions are needed in order to keep time and costs at a reasonable level, maintaining at the same time an high level of structural safety and functionality. The network arch bridge solution completely respond to these requirements, and in addition could be designed as a very pleasant and formally elegant structure, because of its slenderness and lightness. In this paper, an introduction on the network arch solution is presented, together with structural analysis and data of relevant structures realized. Furthermore, an optimization of specific types of road and railway bridges is presented in the particular case of hollow sections, considering three alternative of cable disposition.

scholarly journals Analysis of Temperature and Humidity Distribution and Corrosion Effect on Suspender of Arch Bridge

2021 ◽  
Author(s):  
Shiqiao Xu
Keyword(s):  
Cross Section ◽  
Coupling Effect ◽  
Steel Wire ◽  
Operation Time ◽  
Element Model ◽  
Arch Bridge ◽  
Temperature And Humidity ◽  
The Cross ◽  
Numerical Finite Element ◽  
Arch Bridges

With the continuous improvement of bridge span, high-strength steel wire suspenders are more and more widely used in arch bridges. Because metals are thermodynamically unstable, most metals will corrode at a different speed. Especially with the increase of bridge operation time, the suspender steel wire will be corroded under the coupling effect of external environment and internal temperature and humidity. By taking Wanganshi Fuhe Bridge as the engineering example, this study established a numerical finite element model to simulate the variation of temperature in the cross section of the suspender. Then, the distribution of humidity in the cross section in the suspender under the influence of temperature can be obtained. Finally, the corrosion rate of the suspender and the residual diameter after corrosion at different operating years were calculated. Based on the analysis results, the performance of the suspender is divided into different grades which can be used to guide the maintenance and replacement of the suspender of the arch bridge by the bridge maintenance and management department.

An Investigation into the Earthquake Reaponses of Special-Shaped Arch Bridges

2011 ◽  
Vol 117-119 ◽  
pp. 328-331
Author(s):  
Chang Huan Kou ◽  
Ming Chang Yang ◽  
Shih Wei Ma ◽  
Tsung Ta Wu
Keyword(s):  
Stress Responses ◽  
Response Spectrum ◽  
Element Model ◽  
Geometric Shape ◽  
Arch Bridge ◽  
Out Of Plane ◽  
Internal Forces ◽  
Arch Bridges ◽  
Cable Forces ◽  
Vertical Deformations

By building a finite element model of a special-shaped arch bridge, this paper discusses the effects of the changes of the geometric shape, and the skewed angle of the girder and arch on the dynamic characteristics. In addition, this paper analyzes the longitudinal earthquake responses using the response spectrum method. The results show that when longitudinal earthquakes occur, all geometric shapes, and skewed angles of the girder and arch exhibit different levels of effect on the horizontal and vertical deformations of the girder and the arch, the internal forces of the arch, the girder, and the cables. Among all these parts of the bridge, the arch is affected most by the aforementioned factors. Moreover, because of the unique geometric shape of the special-shaped arch bridge, the distributions of initial and completed cable forces are complex. Therefore, obtaining regular stress responses from the special-shaped arch bridge is difficult regardless of whether the bridge is in-plane or out-of-plane. Hence, the arrangement of cable forces should be specifically considered when building an analytic model of a special-shaped arch bridge.

Seismic Analysis of Reinforced Concrete Rib Arch Bridge

2012 ◽  
Vol 256-259 ◽  
pp. 1496-1502 ◽  
Author(s):  
Da Lin Hu ◽  
Tian Qi Qu ◽  
Hong Bin Wang ◽  
Long Gang Chen
Keyword(s):  
Reinforced Concrete ◽  
Seismic Response ◽  
Ground Motion ◽  
Seismic Analysis ◽  
Element Model ◽  
Structural Dynamic ◽  
Arch Bridge ◽  
Internal Forces ◽  
Arch Bridges ◽  
Horizontal Ground Motion

There are few researches on seismic response of reinforced concrete rib arch bridges at present; therefore, it is necessary to analyze seismic performance of this kind of bridges. Based on the engineering background of a three-span reinforced concrete rib arch bridge, a full bridge finite element model is built to analyze the structural dynamic characteristic and seismic response of the bridge. The internal forces and displacements of each key section is compared and discussed when the bridge is excited by horizontal unidirectional ground motion or the combination of vertical and horizontal ground motion. The structural seismic response calculated with different analysis methods is compared. The research results of this study can be used as a reference for the seismic design of similar bridges.

scholarly journals Dynamic Response Evaluation of Long-Span Reinforced Arch Bridges Subjected to Near- and Far-Field Ground Motions

2018 ◽  
Vol 8 (8) ◽  
pp. 1243 ◽  
Author(s):  
Iman Mohseni ◽  
Hamidreza Lashkariani ◽  
Junsuk Kang ◽  
Thomas Kang
Keyword(s):  
Ground Motion ◽  
Dynamic Performance ◽  
Time History ◽  
Bending Moment ◽  
Element Model ◽  
Structural Performance ◽  
Far Field ◽  
Inelastic Behavior ◽  
Earthquake Loads ◽  
Arch Bridges

This study assessed the structural performance of reinforced concrete (RC) arch bridges under strong ground motion. A detailed three-dimensional finite element model of a 400 m RC arch bridge with composite superstructure and double RC piers was developed and its behavior when subjected to strong earthquakes examined. Two sets of ground motion records were applied to simulate pulse-type near- and far-field motions. The inelastic behavior of the concrete elements was then evaluated via a seismic time history analysis. The concept of Demand to Capacity Ratios (DCR) was utilized to produce an initial estimate of the dynamic performance of the structure, emphasizing the importance of capacity distribution of force and bending moment within the RC arch and the springings and piers of the bridge. The results showed that the earthquake loads, broadly categorized as near- and far-field earthquake loads, changed a number of the bridge’s characteristics and hence its structural performance.

scholarly journals Refined Finite Element Analysis of Crack Causes in SRC Arch Rib Bridges considering Multiple Factors

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Mengsheng Yu ◽  
Nianchun Deng ◽  
Qifeng Chen ◽  
Tianzhi Hao
Keyword(s):  
Steel Frame ◽  
Element Analysis ◽  
Shrinkage Temperature ◽  
Arch Bridge ◽  
Temperature Changes ◽  
Concrete Shrinkage ◽  
Shrinkage Process ◽  
Crack Problems ◽  
Arch Bridges ◽  
Bearing Structure

The SRC (steel-frame reinforced concrete) arch bridge is an important part of the development of arch bridges. Scholars worldwide have studied it from various aspects because of its stronger stiffness and stability than other types of bridges especially when crossing the canyon. The steel frame is a stress bracket during construction. Concrete becomes the main axial-pressure bearing structure when it fills the inner pipe and the encased frame. This article mainly focuses on the crack problems of SRC arch bridging during the postconstruction operation, local model of the midspan arch rib, and the equivalent relationship between the coefficient of expansion and the temperature of concrete. This study uses a cooling method to simulate the shrinkage process with detailed analysis of three properties including concrete shrinkage, temperature gradients, and concentrated hanger rod force. It is concluded that the SRC arch bridge will have large tensile stress on both inner and outer surfaces of slab and web when the temperature changes, and it is the main cause of cracks. The results agree well with measured data. At last, we come up with some reference suggestions in the design and construction of similar bridges in the future.

Novel Hanger Design to Improve the Robustness of Through Arch Bridges

2011 ◽  
Vol 90-93 ◽  
pp. 862-868
Author(s):  
Qi Ming Wu ◽  
Dang Qi Yang ◽  
Fei Cui ◽  
Xiao Wei Yi ◽  
Rui Juan Jiang
Keyword(s):  
Progressive Collapse ◽  
Time History ◽  
Structural Members ◽  
New Approach ◽  
Arch Bridge ◽  
Structural Robustness ◽  
Arch Bridges ◽  
Dynamic Time ◽  
The Impact ◽  
Emergency Measures

Hangers in through arch bridges are important components since they suspend the bridge deck from the arch ribs. Local damage at a hanger may lead to progressive damage of various components in the arch bridge or even progressive collapse of the bridge. In this paper, the conventional design of double-hangers in through arch bridges is reviewed. Then a new approach to design the double-hangers is put forward. The suitability and robustness of this approach is then verified by a numerical simulation of a real through arch bridge. The impact effects induced by local hanger fracture on other structural members are simulated by dynamic time-history analyses. The new approach to design the hangers for through arch bridges is shown to improve the structural robustness. With the application of the new way put forward here, when one or more hangers are damaged to fail, the through arch bridge will not be endangered and will still maintain the overall load-bearing capacity during an appropriate length of time to allow necessary emergency measures to be taken, which illustrates the leading principle of structural robustness well.

Study on Reliability Evaluation Method of Existing CFST Arch Bridge

2012 ◽  
Vol 226-228 ◽  
pp. 1679-1682
Author(s):  
Yi Song Zou ◽  
Hai Tao Hou ◽  
Wei Peng
Keyword(s):  
System Reliability ◽  
Reliability Index ◽  
Evaluation Method ◽  
Reliability Assessment ◽  
Steel Tube ◽  
Arch Bridge ◽  
Cfst Arch Bridge ◽  
Arch Bridges ◽  
Grading Standards ◽  
Bridge System

Based on reliability theory, the application calculation method of Concrete Filled Steel Tube (CFST) arch bridge system reliability index is studied. Select the most unfavorable load distribution in working condition of maximum moment and deflection at the mid-span, from the angle of strain energy, calculated the weights of CFST arch ribs component. On the basis of the grading standards of reliability assessment of the existing bridge components and the critical structures, CFST arch bridge system reliability assessment grading standards are constructed. CFST arch bridges reliability index are evaluated from two aspects (the arch ribs and segment) in this article. As the CFST arch bridge locates in the marine environment, corrosion environment is the serious level of C5-M, steel pipe corrosion is the major diseases of CFST, arch rib which on the corrosion conditions were assessed. The results show that the method can effectively assess the situation of CFST arch bridge.

Sign in / Sign up

Export Citation Format

Share Document