scholarly journals Seismic Mitigation of Curved Continuous Girder Bridge Considering Collision Effect

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 129
Author(s):  
Zhengying Li ◽  
Shaobo Kang ◽  
Chuan You
Keyword(s):  
Steel Wire ◽  
Element Model ◽  
Response Analysis ◽  
Prevention Measures ◽  
Curved Bridges ◽  
Viscoelastic Dampers ◽  
Lead Rubber Bearing ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Seismic Mitigation

Due to structural irregularity, curved bridgesaremore likely to cause non-uniform collisions and unseating between adjacent components when subjected to earthquakes. Based on the analysis of the collision response of curved bridges duringearthquakes, and according to the seismic characteristics of curved bridges, research was carried out on pounding mitigation and unseating prevention measures. A curved bridge with double column piers was taken as an engineering example, and a finite element model of curved bridges thatcould consider the non-uniform contact collision between adjacent components was built with ABAQUS software. Viscoelastic dampers, viscous dampers, and a lead rubber bearing were selected as the damping devices, and a steel wire rope-rubber mat was used as the pounding mitigation device to form the combinatorial seismic mitigation system. Based on the principle of energy dissipation combined with constraints, three kinds of combined seismic mitigation case were determined; a seismic response analysis was then performed. The results indicated that the three kinds of combined seismic case were effective atreducing the response topounding force, stress, damage, girder torsion and displacement, and achieved the goals of seismic mitigation and unseating prevention.

Application of Seismic Energy Dissipation Approach to Curved Continuous Girder Bridge

2011 ◽  
Vol 99-100 ◽  
pp. 224-228
Author(s):  
Xing Jun Qi ◽  
Yi Liu ◽  
Chun Hui Zhang
Keyword(s):  
Energy Dissipation ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Seismic Energy ◽  
Element Model ◽  
Internal Force ◽  
Response Characteristics ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Seismic Mitigation

Under earthquake action there are irregular rotating displacements in the curved girder bridge, and the effective seismic mitigation method for curved bridge need to be systematically studied. The spatial finite element model is established for a curved continuous girder bridge with double-column piers. Energy dissipation dampers including E-steel dampers, viscous dampers, friction pendulum bearings and lead rubber bearings are set in radial and tangent directions of the curve at the positions of active bearings. The seismic mitigation effectiveness and seismic response characteristics of the curved girder bridge are calculated and analyzed with the four energy dissipation approaches under three dimensional ground motion action. The results indicate that the four energy dissipation approaches can all effectively reduce the bending moments and torsional moments at the bottom of piers, and the bending torsion coupling effect of the curved girder bridge is decreased a bit. The difference of internal force for inside and outside piers is reduced after the dampers set for the curved girder bridge with double-column piers. Relatively, the viscous damper approach can further reduce the whole seismic responses of curved continuous girder bridge, and is an excellent seismic mitigation method suitable for curved girder bridge.

Bearing Simulation in Seismic Response Analysis of a Multi-Span Continuous Girder Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1029-1033
Author(s):  
Yong Huang ◽  
Jun Jie Wang ◽  
De Yin Jin
Keyword(s):  
Seismic Performance ◽  
Response Analysis ◽  
Restoring Force ◽  
The Wenchuan Earthquake ◽  
Before And After ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Bearing Damage ◽  
Strong Ground ◽  
Made In

The damage of bearing will change the boundary condition for whole bridge, if we do not take account of bearing failure, the error of structural analysis and the unreasonable in design will be made. In this paper, the effect of possible bearing damage to whole bridge during strong ground motion is studied through examining the seismic performance of a multi-span continuous girder bridge which is a real damaged bridge during the Wenchuan earthquake in 2008. Proper analytical restoring force models of bearings are proposed, which can simulate the seismic performance of the bridge before and after the bearing damage suitably.

Based on the Different Specifications of Jacking Construction of Continuous Girder Bridge Reliability Analysis

2014 ◽  
Vol 584-586 ◽  
pp. 2017-2022
Author(s):  
Jian Kang Shen
Keyword(s):  
Reliability Analysis ◽  
Cross Section ◽  
Prestressed Concrete ◽  
Reliability Index ◽  
Element Model ◽  
Construction Stage ◽  
Calculation Results ◽  
Continuous Girder Bridge ◽  
Bridge Reliability ◽  
Girder Bridge

The purpose of this paper is aimed at according to the "highway reinforced concrete and prestressed concrete bridge and culvert design specifications (JTG D62-2004) and (JTJ 023-85) design of jacking construction of continuous girder bridge for reliability analysis. By establishing a finite element model of construction stage and into a bridge stage respectively the reliability index of the typical cross section is analyzed. Aiming at construction stage, by choosing typical cross section of reliability analysis, draw a cross section of reliability index with the change of construction stage. Calculation results show that, according to JTG D62-2004 specification of reliability index calculation results than based on results of calculating the JTJ 023-85 specification. In this paper, the analysis results can provide reference for pushing the construction of the continuous girder bridge design.

Study on Cracking Reasons for Continuous Box Girder Bridge with Secondary Concreting

2011 ◽  
Vol 368-373 ◽  
pp. 2351-2358
Author(s):  
Si Ping Lu ◽  
Fang Lin Huang ◽  
Yan Bin Wu
Keyword(s):  
Inelastic Deformation ◽  
Prevention Measures ◽  
Box Girder ◽  
Concrete Cracking ◽  
Concrete Crack ◽  
Measurement Results ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Global Deformation ◽  
Early Age Concrete

This paper studied the main cracking reasons for small and medium-span continuous girder bridge with secondary concreting based on ANSYS. Some prevention measures to concrete crack caused by the inelastic subsidence were also proposed. In considering the global deformation of scaffold-beam, the inelastic deformation of scaffold, the hydration heat of cement, and the characteristics of early-age concrete, influence of inelastic subsidence of support foundation on concrete cracking were analyzed by time-varying transient analysis. It can be concluded that the value of inelastic deformation is the decisive factor for the concrete cracking. Field measurement results of several bridges validate the conclusion.

Failure Mechanism Study of Bridge Retainer in Earthquake

2013 ◽  
Vol 295-298 ◽  
pp. 2049-2053
Author(s):  
Yun Zhang ◽  
Bei Li ◽  
Liu Bin Yan
Keyword(s):  
Time History ◽  
Element Model ◽  
Nonlinear Time History Analysis ◽  
Mechanism Study ◽  
Damage State ◽  
Calculation Results ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Nonlinear Time History ◽  
Failure Types

Taking a typical continuous girder bridge for example, the text builds spatial beam finite element model. By nonlinear time history analysis method, it analyzes bridge transverse pounding and the retainer strength in different strength levers earthquake. According to bridge pier failure and fragility theory and retainer section moment-curvature analysis, it puts forward retainer failure types in different strength levers earthquake. The calculation results show that it is irrational to design retainer section and reinforcement based on structure requirement. The structural retainer failure types have uncertainty without considering bridge seismic fortification goal. Though it appears on ductility failure, the damage state is very serious.

Analysis for Seismic Responses of Continuous Girder Bridge under Strong Near-Fault Earthquake Level

2013 ◽  
Vol 353-356 ◽  
pp. 1901-1906
Author(s):  
Xin Le Li ◽  
Hui Juan Dou ◽  
Dan Shen
Keyword(s):  
Seismic Response ◽  
Time History ◽  
Element Model ◽  
Near Fault ◽  
Seismic Design Code ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Dynamic Time ◽  
The Finite Element Model ◽  
Force Characteristics

In order to explore the safety performance of continuous structure bridge near fault zone, a typical three spans continuous girder bridge of highway was selected to study the structural seismic response. The finite element model of whole bridge considered the force characteristics of bearing and pile-soil interaction was constructed. Typical near-fault records were selected from the important earthquake events. Several artificial waves characterized with the soil type in bridge site were simulated and used for dynamic analysis. The seismic performance of continuous bridge was studied by nonlinear dynamic time-history method. Research results indicate that, especially large amplitude pulse effect of near-fault records for strong near-fault earthquake, will significantly enhance the seismic response of continuous girder bridge under the second seismic level (EL2) leads to structure to collapse. The fact that the near-fault effect is not considered in China existing highway bridge seismic design code will increase the destructive risk of structure.

Fine-Analysis for the Concrete Upper Rotation Table and Pier of a Bridge Using Rotation Construction Method

2014 ◽  
Vol 638-640 ◽  
pp. 1099-1102 ◽  
Author(s):  
Fan Xin Jia ◽  
De Wei Chen ◽  
Yang Yang Wu
Keyword(s):  
Prestressed Concrete ◽  
Element Model ◽  
Construction Method ◽  
Eccentric Load ◽  
Solid Element ◽  
Continuous Girder Bridge ◽  
Load Effects ◽  
Girder Bridge

This paper focuses mainly on the case of a three-span prestressed concrete continuous girder bridge. A solid element model of the concrete upper rotation table and pier was established adopting the Midas/Civil Software, considering four unfavorable conditions including eccentric load effects. Then a strict inspection was given on the stresses and deformations of the model in each condition to check the safety of the structures during both processes of girder casting and bridge rotation. The results are positive and satisfactory.

IMPACTS OF PRE-STRESS LOSS ON THE LONG-TERM DEFLECTION FOR LONG-SPAN PC CONTINUOUS GIRDER BRIDGE

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Jianqing Bu ◽  
Jincan Cui
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Analysis Software ◽  
Element Analysis ◽  
Girder Bridges ◽  
Long Span ◽  
The Finite Element Analysis ◽  
Continuous Girder Bridge ◽  
Girder Bridge

In order to analyze the impacts of pre-stress loss on the long-term deflection for long-span PC continuous girder bridges, this paper presents a numerical analysis using the finite element analysis software MIDAS/Civil based on a long-span PC continuous box-section girder bridge in Shijiazhuang. Once the 3-D finite element model was established, the influences of different pre-stress loss levels and locations were analyzed in a numerical simulation. Pre-stress loss is often the key reason for long-term deflection in long-span PC continuous girder bridges, so we can estimate the development of deflection by considering these factors during the operation.

Seismic Mitigation Analysis of Viscous Dampers for Curved Continuous Girder Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 1230-1233 ◽  
Author(s):  
Yi Liu ◽  
Xing Jun Qi ◽  
Yi Jian Wang ◽  
Shu Gang Chen
Keyword(s):  
Seismic Response ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Internal Force ◽  
Viscous Dampers ◽  
Absorption Effect ◽  
Curved Bridge ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Seismic Mitigation

The seismic response of curved girder bridge is more complex because of its irregular plane shape, therefore, the systematic study of an effective seismic mitigation method is required. In this article, the three-dimensional computational model of a double-pier curved continuous girder bridge is established and viscous dampers are added at the positions of sliding bearings. The full-bridge seismic response absorption effect is analyzed with the viscous dampers damping method under three ground motions of different frequency spectrum characteristic, and each ground motion contains three-direction. The results show that viscous dampers can reduce the difference of internal force between inner pier and outer pier in double-pier curved bridge, and it can also effectively reduce the bending and twisting coupling effect of curved bridge. But viscous dampers are sensitive to seismic spectrum to some degree, therefore seismic response absorption effect and sensitivity should be considered comprehensively when viscous dampers are selected.

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