Mechanical property and damage evolution of concrete interface of ballastless track in high-speed railway: Experiment and simulation

Zhu, Shengyang; Wang, Mingze; Zhai, Wanming; Cai, Chengbiao; Zhao, Chunfa; Zeng, Dongfang; Zhang, Jiawei

doi:10.1016/j.conbuildmat.2018.07.163

Cited by 108 publications

(34 citation statements)

References 24 publications

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“…It was found by Zhu and Cai [6] that the temperature difference between the top and bottom surfaces of track slab can reach over 16 • C. The temperature gradient load induced by the great temperature differential may result in the generation of pulling and curling stresses in the prefabricated concrete slabs [32] and structural defects. Typical temperature-induced slab track defects include interface debonding/delamination between CA mortar and track slab [4,7,12,18,25,26,32,39], decreased compressive strength, cracking and damage of CA mortar [9,15,16,33,35,[40][41][42], wide and narrow juncture defects [8], warping deformation of track slab [13,16,26,38], etc.…”

Section: Temperature-induced Slab Defects and Warping Deformationmentioning

confidence: 99%

“…Warping deformation starts with initial misalignment/upward curl during the construction phase and usually occurs during high-temperature seasons [16]. Under the aforementioned temperature effect, the top surface of slabs will elongate, while the bottom will compress [16,20,26,39]. As a result, slab warps upward due to eccentric compression.…”

Section: Temperature-induced Slab Defects and Warping Deformationmentioning

confidence: 99%

“…A straightforward method of damage detection for slab track is regular visual inspection or non-destructive testing (NDT) methods [20][21][22][23][24][25][26][27][28]. The NDT techniques are powerful in damage detection for concrete structures, especially in structural health monitoring of bridges [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…The NDT techniques are powerful in damage detection for concrete structures, especially in structural health monitoring of bridges [29][30][31]. The NDT techniques adopted in ballastless railway detection mainly includes impact-echo method [21,23,24], ground-penetrating radar (GPR) [21], digital image correlation (DIC) [25,26] and synthetic aperture focusing technique (SAFT) ultrasound imaging method [27,28]. They can detect specific slab defects and report the size and even geometry of defects through customized devices.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Temperature-Induced Deformation for HSR Slab Track Using Track Geometry Measurement Data

Liu

2019

Sensors

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Slab track is widely used in many newly built high-speed rail (HSR) lines as it offers many advantages over ballasted tracks. However, in actual operation, slab tracks are subjected to operational and environmental factors, and structural damages are frequently reported. One of the most critical problems is temperature-induced slab-warping deformation (SWD) which can jeopardize the safety of train operation. This paper proposes an automatic slab deformation detection method in light of the track geometry measurement data, which are collected by high-speed track geometry car (HSTGC). The characteristic of track vertical irregularity is first analyzed in both time and frequency domain, and the feature of slab-warping phenomenon is observed. To quantify the severity of SWD, a slab-warping index (SWI) is established based on warping-sensitive feature extraction using discrete wavelet transform (DWT). The performance of the proposed algorithm is verified against visual inspection recorded on four sections of China HSR line, which are constructed with the China Railway Track System II (CRTSII) slab track. The results show that among the 24,806 slabs being assessed, over 94% of the slabs with warping deformation can be successfully identified by the proposed detection method. This study is expected to provide guidance for efficiently detecting and locating slab track defects, taking advantage of the massive track inspection data.

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Section: Temperature-induced Slab Defects and Warping Deformationmentioning

confidence: 99%

Section: Temperature-induced Slab Defects and Warping Deformationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Identification of Temperature-Induced Deformation for HSR Slab Track Using Track Geometry Measurement Data

Liu

2019

Sensors

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“…In other words, slippage or debonding is not allowed between adjacent layers [13,14]. As a layered structure composed of track-slab, cement concrete base plate (CCBP), asphalt concrete waterproofing layer (ACWL), and cement concrete base or supporting layer, the adjacent layers in the ballastless track subgrade are bonded by the interfacial adhesion force which is much smaller than the strength of the concrete layers [15,16]. In this regard, the interface is the weakest part of the whole structure.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Interface Damage between Cement Concrete Base Plate and Asphalt Concrete Waterproofing Layer under Temperature Load in Ballastless Track

et al. 2020

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The interfacial bond between cement concrete base plate (CCBP) and asphalt concrete waterproofing layer (ACWL) is a weak portion in the newly developed Chinese high-speed railway ballastless track. The interface damage caused due to fluctuating temperature load and dynamic train load is one of the most critical problems in Northern China. This paper aims to investigate the interface damage evolution process under temperature load via experimental and simulation analysis. Full-scale transverse shear tests were performed to explore the interface bond-slip mode of the adjacent ACWL and CCBP. Then, a finite element model of a ballastless track structure was built and a cohesive zone model (CZM) was utilized to model the interface damage initiation, crack propagation, and delamination process under uniform/gradient temperature load. Furthermore, the dynamic response of the ballastless track where CCBP and ACWL were partly/totally debonded was investigated and compared with the perfectly bonded structure. The results demonstrate that bilinear CZM is capable of revealing the interface damage initiation, crack propagation, and delamination process under temperature load. The interface state between the adjacent CCBP and ACWL was greatly affected by temperature changes and the interface bonding state had a great impact on the dynamic response of ballastless track.

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Cooperative Work of CRTS II Slab Ballastless Track-32m Simply Supported Girder under Pier Settlement

Zheng

Liu

et al. 2021

KSCE J Civ Eng

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Mechanical property and damage evolution of concrete interface of ballastless track in high-speed railway: Experiment and simulation

Cited by 108 publications

References 24 publications

Identification of Temperature-Induced Deformation for HSR Slab Track Using Track Geometry Measurement Data

Identification of Temperature-Induced Deformation for HSR Slab Track Using Track Geometry Measurement Data

Investigation on Interface Damage between Cement Concrete Base Plate and Asphalt Concrete Waterproofing Layer under Temperature Load in Ballastless Track

Cooperative Work of CRTS II Slab Ballastless Track-32m Simply Supported Girder under Pier Settlement

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