scholarly journals Seismic Response Analysis of Pier considering Durability Damage Repair

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Yan Liang ◽  
Liangliang Li ◽  
Ruimin Mao ◽  
Xiaoye Shi
Keyword(s):  
Seismic Performance ◽  
Steel Corrosion ◽  
Element Model ◽  
Response Analysis ◽  
Reinforced Concrete Structure ◽  
Analysis Model ◽  
Bond Slip ◽  
Damage Repair ◽  
Bridge Structures ◽  
Material Durability

At present, most of the research studies on the seismic performance of the durability degraded reinforced concrete structure only consider the influence of a single factor. This paper comprehensively considers the factors such as concrete carbonization, steel corrosion, and bond slip performance degradation caused by other durability factors and durability damage repair and studies the influence of the above factors on the seismic performance of bridge structures. Based on the finite element model considering the bond slip and the material parameters of time-varying durability damage, the seismic performance analysis model of the pier is established considering material durability damage repair in different service periods. Then, the effect of material durability damage repair on the seismic performance of the pier is examined. The results show that the displacement of the pier top increases, the curvature of the pier bottom decreases, and the moment-curvature curve pinching phenomenon is further evident when considering the bond slip. When considering the durability damage repair of materials, the curvature considerably decreases (the maximum value is approximately 16.04%) with the extension of the service time of the bridge, and the pier damage is substantially reduced.

Study on Effect of Seismic Joint to Seismic Response of Tunnel Passing through Fault

2013 ◽  
Vol 482 ◽  
pp. 252-255 ◽  
Author(s):  
Feng Gao ◽  
Xiao Gang Shu ◽  
Dian Li Xue ◽  
Jiao Liu
Keyword(s):  
Seismic Response ◽  
Underground Structure ◽  
Element Model ◽  
Separation Distance ◽  
Practical Significance ◽  
Seismic Resistance ◽  
Response Analysis ◽  
Analysis Model ◽  
Fault Fracture Zone ◽  
Tunnel Depth

As underground structure, the tunnel itself has good anti-seismic performance, but in recent years, according to a large number of investigation data about the earthquake disaster for tunnel, we find that the tunnel passing through the fault fracture zone is quite easy to be destroyed seriously. Therefore, developing dynamic response analysis and shock absorption measures has great practical significance. According to the characteristics of tunnel passing through fault and the tunnel depth, considering a certain proportion relationship in finite element model, the analysis model for tunnel seismic joint is established. Finally comparing the results comprehensively, we discuss the effect of the different setting location and setting separation distance of seismic joint to seismic response of tunnel passing through fault. From the work we have done, we get the seismic joint which is good for tunnel seismic resistance. This method is expected to be adopted as reference to the similar projects.

Analysis of Crankshaft Fatigue Strength Based on Integrated Finite Element Model

2010 ◽  
Vol 44-47 ◽  
pp. 1558-1562 ◽  
Author(s):  
Xiao Ping Chen ◽  
Ru Fu Hu ◽  
Shu Hua Zheng
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Fatigue Limit ◽  
Limit Load ◽  
Element Model ◽  
Response Analysis ◽  
Analysis Model ◽  
Element Analysis ◽  
Complex Mechanical Systems ◽  
Multi Body

Aiming at the complex mechanical systems for the prediction of the fatigue limit load requirements, this paper examines the relationship among finite element analysis model and the performance models. And a finite element modeling method for fatigue analysis is proposed. The finite element model can support static, modal, fatigue, and multi-body dynamic response analysis in parallel and collaboration. This method helps improve the fatigue limit load analysis.

Finite Element Seismic Response Analysis of a Reinforced Concrete Pier with a Fractured Fine Tetrahedron Mesh

2016 ◽  
Vol 10 (05) ◽  
pp. 1640013
Author(s):  
Shigenobu Okazawa ◽  
Takumi Tsumori ◽  
Takuzo Yamashita ◽  
Satoyuki Tanaka
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Seismic Response ◽  
Seismic Waves ◽  
Element Model ◽  
Response Analysis ◽  
Analysis Model ◽  
Seismic Response Analysis ◽  
Seismic Experiment ◽  
Node Connectivity

A seismic response analysis of a reinforced concrete (RC) pier has been undertaken using seismic waves recorded at the Takatori station during the southern Hyogo perfecture earthquake in 1995 in Japan. Distinguishing characteristics of this analysis are as follows. First, the RC pier has been modeled using the finite element method with a solid mesh. The analysis model has been generated using tetrahedral elements with node connectivity, not only in the concrete but also in the reinforcement steel. Also, an analysis has been undertaken on fracture treatments in the concrete. Using PDS-FEM, a system of suitable fractures in the concrete resulting from the seismic event can be simulated. Ultimately, a finite element model is established with a fine tetrahedron mesh with about 20 million elements. We calculate a seismic response analysis using the K computer at the RIKEN Advanced Institute for Computational Science, and compare that result with a seismic experiment in E-Defense to confirm the computational approach.

scholarly journals Seismic Behavior of Posttensioned Concrete Bridge Piers with External Viscoelastic Dampers

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Anxin Guo ◽  
Huixing Gao
Keyword(s):  
Finite Element ◽  
Seismic Performance ◽  
Time History ◽  
Element Model ◽  
Bridge Piers ◽  
Cyclic Behavior ◽  
Element Analysis ◽  
Viscoelastic Dampers ◽  
Posttensioned Concrete ◽  
Bridge Structures

This paper investigates the seismic performance of posttensioned concrete piers with external viscoelastic dampers to improve the energy dissipation capacity of this type of structure. An installation scheme for viscoelastic dampers on bridge piers is proposed, and the mechanical models of the damper are analyzed according to the installation scheme. By attaching the viscoelastic dampers to the posttensioned bridge piers, the analytical model of the hybrid system is established using the OpenSees finite element analysis package. Cyclic behavior and time history analyses are conducted on a posttensioned bridge with and without viscoelastic dampers using the established finite element model. The analysis results indicate that the viscoelastic dampers can effectively improve the seismic performance of the bridge structures with posttensioned piers.

scholarly journals Seismic Fragility Analysis of Multispan Continuous Girder Bridges with Varying Pier Heights considering Their Bond-Slip Behavior

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Yang Cao ◽  
Yan Liang ◽  
Chenzi Huai ◽  
Ji Yang ◽  
Ruimin Mao
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Seismic Performance ◽  
Earthquake Engineering ◽  
Great Influence ◽  
Element Model ◽  
Seismic Fragility ◽  
Bond Slip ◽  
Reliability Method

The bond-slip effect has a great influence on the seismic performance of reinforced concrete structures and ignoring it will overestimate the seismic performance of the structures. Based on the low-cyclic reversed loading experiment of a reinforced concrete column, this paper uses OpenSees to establish a nonlinear finite element model considering bond-slip and verify its correctness. In this paper, a multispan continuous girder bridge with varying pier heights is taken as an example. Considering the effect of the bond-slip behavior of steel bars, a refined finite element model based on the OpenSees platform is established to do the numerical simulation analysis. 10 seismic waves are selected from the Pacific Earthquake Engineering Research Center (PEER) according to the site condition and modulate the amplitude to 150 waves. This paper uses the incremental dynamic analysis (IDA) and the second-order reliability method to analyze the seismic fragility of bridge components and systems, respectively. Results show that the exceeding probability increases obviously when considering bond-slip, and with the increase of seismic spectral acceleration, the influence of bond-slip on the exceeding probability of components also increases; when bond-slip is considered, the difference of system fragility between the upper and lower limits under four damage states is greater than that without bond-slip.

Dynamic Response Analysis of Xi'an Bell Tower Timber Structure under the Metro-Vibration Loading of Line 2 and 6

2013 ◽  
Vol 353-356 ◽  
pp. 1732-1738
Author(s):  
Zhao Bo Meng ◽  
Teng Fei Zhao ◽  
Jie Jin ◽  
Xi Feng Li
Keyword(s):  
Technical Specification ◽  
Interaction Model ◽  
Time History ◽  
Element Model ◽  
Response Analysis ◽  
Winkler Foundation ◽  
Analysis Model ◽  
Bell Tower ◽  
Dimensional Finite Element ◽  
The Impact

The effects of metro line 2 and line 6 on Xi'an Bell Tower was studied by numerical analysis in this paper. At first, according to the theory of Euler-Bernoulli beam in Winkler foundation, the analysis model of train-track-foundation system was established, and then, time-history curve of metro-induced loading acts on tunnel structure is obtained by using Matlab produce platform. Secondly, two-dimensional finite element model of the structure-soil-tunnel interaction model was established using ANSYS. Finally, the impact of metro line 2 and 6 and ground transportation on Xi’an Bell Tower was evaluated according to the Technical specification for protection of historic buildings against man-made vibration. The construction of Metro Line 2 and Line 6 will affect the safety of Xi'an Bell Tower.

Study on Earthquake Response Analysis of Reinforced Concrete Masonry Structure

2011 ◽  
Vol 295-297 ◽  
pp. 244-248 ◽  
Author(s):  
Hai Xu Yang ◽  
Tong Shen ◽  
Jian Gang Yao
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Time History ◽  
Concrete Block ◽  
Nonlinear Time History Analysis ◽  
Response Analysis ◽  
Elastic Model ◽  
Masonry Building ◽  
Analysis Model ◽  
Concrete Masonry

According to the analysis of a six-story reinforced concrete masonry building model with the methods of nonlinear time history analysis, the seismic performance of structure has been studied in this paper. The interstory shear-deformation and stiffness of linear elastic model is established. The availability of the analysis model, hysteretic model and relevant parameters adopted and the computation program developed are verified. The longitudinal deformation of structure is bigger than the lateral deformation under different earthquake waves, from this it can be showed that longitudinal seismic performance is smaller than lateral wall; for seven-story concrete block building with core-and tie-columns, the requirement of the seismic fortification intensity can be met. The analysis of this paper provides a reference for reinforced concrete block buildings.

scholarly journals Influence of Restrainer Piers on the Seismic Performance of Long Bridges with Equal-Height Piers

2021 ◽  
Vol 2021 ◽  
pp. 1-23
Author(s):  
Yuhu Luo ◽  
Yongguang Li ◽  
Xu Wang ◽  
Guangping Lu
Keyword(s):  
Seismic Performance ◽  
Seismic Waves ◽  
Time History ◽  
Relative Displacement ◽  
Seismic Effect ◽  
Analysis Model ◽  
Finite Element Software ◽  
Bridge Structures ◽  
Maximum Relative Displacement ◽  
Equal Height

Pounding may occur between the main girders under the action of strong earthquakes, so as between main girders and abutments. This causes excessive longitudinal displacement of the main girder and unseating damage to bridges. Because long bridges in mountainous areas with high intensity are easy to unseat, the authors studied the influence of restrainer piers, expansion joint spacings (EJSs), and the span on the seismic performance of long bridges. The ABAQUS finite element software was used to simulate a bridge dynamic analysis model considering the elastoplasticity of the pounding effect of the pier and the beam. By inputting El-Centro, Northbridge, and Taft seismic waves, the time-history analysis of the seismic response of long bridges was carried out. The results indicated that a reasonable number of restrainer piers, an appropriate EJS, and a span could effectively reduce the maximum relative displacement of pier-beams. This behavior will improve the seismic performance of bridge structures. Moreover, for a 24-span equal-height beam bridge, the optimum seismic effect was obtained when 3 restrainer piers, an EJS of 70 mm, and a 50 m span were used.

scholarly journals Numerical Analysis on the Seismic Performance of Plane Irregular Structure Based on ABAQUS

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Lina Zong ◽  
Feng Xu ◽  
Wei Yuan ◽  
Xiaolei Ji
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Seismic Performance ◽  
Shaking Table Test ◽  
Shell Element ◽  
Element Model ◽  
Shaking Table ◽  
Analysis Model ◽  
Finite Element Software ◽  
Open Hole

Rod element and shell element were used in finite element software ABAQUS to establish dynamic elastic-plastic analysis model of the structure, the seismic performance of an irregular plane complex overrun structure numerical simulation, the structure was calculated under different input level and displacement response of the acceleration response, and analyses the force of the wear layer column and the floor of the open hole stress level. The results were compared with the shaking table test to verify the accuracy of the numerical simulation results. The results of numerical calculation were basically consistent with the experimental results, and the finite element model basically reflected the response of the structure under the simulated earthquake.

Fracture Analysis of Reinforced Concrete Bridge Structures with Account of Concrete Cracking under Steel Corrosion

2013 ◽  
Vol 831 ◽  
pp. 364-369 ◽  
Author(s):  
Andrey V. Benin ◽  
Artem S. Semenov ◽  
S.G. Semenov
Keyword(s):  
Reinforced Concrete ◽  
Steel Corrosion ◽  
Concrete Cover ◽  
Concrete Bridge ◽  
Bond Slip ◽  
Reinforced Concrete Bridge ◽  
Initiation And Propagation ◽  
Bridge Structures ◽  
Concrete Blocks ◽  
Fracture Processes

A direct 3D finite element (FE) modeling of fracture processes in reinforced concrete bridge structures is considered with account of the macrocracks initiation and propagation, real geometry of reinforcing elements, discontinuity in the bond-slip behavior, using elastic-plastic-damage constitutive equations for concrete. The comparison of obtained FE results with experimental data is presented and discussed for the pulling ribbed bars out of concrete blocks, the spalling of concrete cover at the automobile bridge and cracking of ballastless deck at the railway bridge.

Sign in / Sign up

Export Citation Format

Share Document