Effects of Crack Damage on Acceleration Response of Asphalt Pavement via Numerical Analysis

Based on the compression-shear tests of different specifications LRBs (diameter 700mm,1000mm,1100mm) and shear strain correlation formula, the modified differential restoring force model (modified Bouc-Wen model) is suggested to simulate LRB. An isolated model, nine-story superstructure, is used as the numerical example. Using the unmodified and the modified differential restoring force model of the LRB, the differences of the seismic response of isolated structure are studied by numerical analysis and comparison. Result shows that, unmodified differential restoring force model commonly used in isolation design, except for acceleration response, other earthquake response has not significant error.

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Numerical Analysis of Asphalt Pavement of Lean Concrete Base

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.361-363.1699 ◽

2013 ◽

Vol 361-363 ◽

pp. 1699-1702

Author(s):

Li Jun Suo ◽

Bing Gang Wang

Keyword(s):

Finite Element ◽

Thermal Stress ◽

Numerical Analysis ◽

Finite Element Model ◽

Asphalt Pavement ◽

Element Model ◽

The Other ◽

Shearing Stress ◽

Traffic Loading ◽

Concrete Base

Both thermal stress and load stress, which are caused by temperature change and traffic loading, are important parameters used in the analysis of the new asphalt pavement design. In order to study the stress of asphalt pavement of lean concrete base, first of all, threedimension finite element model of the asphalt pavement of lean concrete base is established. The main objectives of the paper are investigated. One is calculation for stress of asphalt surface, and the other is calculation for stress of lean concrete base. The results show that load stress of lean concrete base increases quickly with the increase of load. Thermal stress of lean concrete base increases with the increase of thickness of base. Asphalt surface is in the state of compression. Maximum shearing stress decreases with the increase of thickness of asphalt surface.

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ABAQUS program-based numerical analysis on U-shaped cracking of asphalt pavement

2011 International Conference on Remote Sensing, Environment and Transportation Engineering ◽

10.1109/rsete.2011.5964911 ◽

2011 ◽

Cited By ~ 2

Author(s):

Li Liu ◽

Peiwen Hao

Keyword(s):

Numerical Analysis ◽

Asphalt Pavement

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Vibration reduction for a high-speed railway bridge in South Korea

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409711412010 ◽

2011 ◽

Vol 226 (2) ◽

pp. 174-186 ◽

Cited By ~ 2

Author(s):

J W Kwark ◽

W J Chin ◽

J R Cho ◽

J W Lee ◽

B S Kim ◽

...

Keyword(s):

Numerical Analysis ◽

High Speed ◽

Maintenance Cost ◽

Vertical Acceleration ◽

Acceleration Response ◽

High Speed Railway ◽

The Public ◽

Bridge Type ◽

Rail Irregularity ◽

Design Requirements

The Gyeongbu high-speed railway (KTX) in Korea has been open to the public since 2004. Since one third of the railway is lying on bridges, a two-span continuous pre-stressed concrete one-cell box girder with 40 m span length was chosen as typical bridge. However, field measurement showed that the chosen bridge type does not satisfy the required design acceleration response of 0.35g under certain circumstances owing to various factors such as rail irregularity, impact owing to discontinuous ballast–sleeper contact, train condition including wheel and interaction between bridge and moving train. This paper intends to find out a measure to control the vibration by changing the structural properties of the originally chosen bridge type. First, a damper system was proposed. Numerical analysis showed that a damper at mid-span could reduce the response by 20 per cent. Accordingly, various types of dampers were installed and compared, but this solution was discarded owing to maintenance cost. Second, added mass solution was proposed. Numerical analysis and scaled-down model indicated that the additional mass could reduce the response by 20 to 40 per cent. Consequently, sand bags of 31.2 tons were dumped at the centre of each span and enabled the vertical acceleration response of the bridge to be successfully controlled in compliance with the design requirements.

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Numerical Analysis of Semi-rigid Asphalt Pavement Deflection under Dynamic Traffic Load

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/688/2/022038 ◽

2019 ◽

Vol 688 ◽

pp. 022038

Author(s):

Xuejun Yue ◽

Jicun Shi ◽

Junxiong Wang ◽

Qing Zhang ◽

Zhongyu Li ◽

...

Keyword(s):

Numerical Analysis ◽

Asphalt Pavement ◽

Traffic Load ◽

Dynamic Traffic

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Modulus Parameter Analysis and Calculation of Steel Deck Asphalt Pavement Material

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.1436 ◽

2016 ◽

Vol 852 ◽

pp. 1436-1442

Author(s):

Min Wang ◽

Nai Xing Liang ◽

Li Xiao ◽

Chao Lan

Keyword(s):

Numerical Analysis ◽

Asphalt Pavement ◽

Analytical Formula ◽

Mechanical Analysis ◽

Parameter Analysis ◽

Analysis Model ◽

Composite Modulus ◽

Analytical Formulas ◽

Steel Deck ◽

Pavement Material

The numerical analysis model and analytic formula, concerning flexural-tensile composite modulus of steel deck paving materials, were established with five-point loading composite beams, in order to explore the modulus value of steel deck paving materials. Regarding the three typical asphalt pavement material such as SMA10, GA10 and EA10, the composite modulus of paving material was calculated by analyzing stepwise loading data, and a universal flexural-tensile composite modulus range is proposed: SMA10 is 500 ~ 550MPa, GA10 is 500 ~ 600MPa, EA10 is 650 ~ 700MPa. The results show good agreement between the modulus of the numerical analysis method and analytical formula method. The proposed analytical formulas can calculate the flexural-tensile composite modulus more easily according to the actual load conditions, and the modulus value played a significant role in guiding the design and mechanical analysis of steel deck pavement system.

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