Full Text:   <1927>

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CLC number: TU41

On-line Access: 2020-12-12

Received: 2020-02-12

Revision Accepted: 2020-06-03

Crosschecked: 2020-11-16

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Yi-lin Wang


Xin-zhuang Cui


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Journal of Zhejiang University SCIENCE A 2020 Vol.21 No.12 P.961-975


Deformational characteristics of sensor-enabled geobelts incorporating two failure modes in reinforced sand

Author(s):  Yi-lin Wang, Xin-zhuang Cui, Kai-wen Liu

Affiliation(s):  School of Civil Engineering, Shandong University, Jinan 250061, China; more

Corresponding email(s):   cuixz@sdu.edu.cn

Key Words:  Geosynthetic, Sensor-enabled geobelt (SEGB), Failure mode, Deformation characteristics, Pullout tests

Yi-lin Wang, Xin-zhuang Cui, Kai-wen Liu. Deformational characteristics of sensor-enabled geobelts incorporating two failure modes in reinforced sand[J]. Journal of Zhejiang University Science A, 2020, 21(12): 961-975.

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author="Yi-lin Wang, Xin-zhuang Cui, Kai-wen Liu",
journal="Journal of Zhejiang University Science A",
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%0 Journal Article
%T Deformational characteristics of sensor-enabled geobelts incorporating two failure modes in reinforced sand
%A Yi-lin Wang
%A Xin-zhuang Cui
%A Kai-wen Liu
%J Journal of Zhejiang University SCIENCE A
%V 21
%N 12
%P 961-975
%@ 1673-565X
%D 2020
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2000056

T1 - Deformational characteristics of sensor-enabled geobelts incorporating two failure modes in reinforced sand
A1 - Yi-lin Wang
A1 - Xin-zhuang Cui
A1 - Kai-wen Liu
J0 - Journal of Zhejiang University Science A
VL - 21
IS - 12
SP - 961
EP - 975
%@ 1673-565X
Y1 - 2020
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2000056

Geobelt deformation is of significance when making prejudgments on potential failure planes in reinforced structures. A failure plane results from two geobelt failure modes, tensile failure and pullout. In order to investigate the deformation characteristics of geobelts in two failure modes, results from pullout tests on sensor-enabled geobelts (SEGBs) with various lengths in sand are reported here across a range of normal pressures. Self-measurements of SEGB can provide data during the tests regarding distributions of strain, stress, and displacement. Data collected during pullout tests reveal the effects of normal pressures and specimen lengths on failure mode. A critical line considering normal pressure and specimen length is derived to describe the transition between two failure modes, an approach which can be utilized for preliminary predictions of failure mode in pullout tests. Warning criteria established based on critical line and data from the self-measurements of SEGB are proposed for failure mode prediction which can contribute to prejudgments of potential failure plane in geosynthetically reinforced soil structures.


创新点:1. 传感型土工带具有拉敏效应和自检测功能,可以实现土工带在拉伸过程中的应变分布式测量; 2. 提出了两种失效模式之间的临界线,该临界线考虑了法向压力和筋材有效长度两个参数,可用于筋材失效模式的初步判断; 3. 根据传感型土工带的变形特征,提出了用于初步预判失效模式的预警准则.
方法:1. 利用传感型土工带的自检测功能,得到拉拔试验过程中筋材应变的分布情况,并进一步分析得到筋材轴向应力和筋材位移的分布情况; 2. 根据不同筋材长度和在不同法向压力下的拉拔试验结果,反向拟合得出两种失效模式之间的临界线; 3. 通过分析传感型土工带的应变、应力和位移分布结果,总结得出两种失效模式下土工带的变形特征.
结论:1. 提出的两种失效模式之间的临界线考虑了筋材长度和法向压力两种因素,可对筋材失效模式进行初步判断. 2. 根据传感型土工带分布式检测结果和变形特征,建立了用于判断两种失效模式的预警准则;加筋土结构中的筋材在潜在滑裂面处出现应变峰值,且筋材变形从滑裂面处开始向两侧逐步发展;一旦筋材末端应变不再为零,则筋材易被拔出;若筋材末端应变为零,同时滑裂面处筋材应变极值达到断裂伸长率,则筋材易断裂;该准则可用于判断和识别加筋土结构的潜在失效模式.


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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