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Behavior of longitudinal-seam steel tubular columns with crack defect in weld SCIE
期刊论文 | 2024 , 212 | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
WoS CC Cited Count: 1
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Abstract :

An experimental investigation was conducted to investigate the axial compressive behavior of square longitudinal-seam steel tubular (LSST) stub columns with artificial crack defect in weld. The axial compression tests were carried out on 108 square LSST stub columns with crack defect and 3 square LSST columns without crack defect as control groups. The effect of design parameters such as thickness of tube, length and width of crack defect, location of crack defect on axial compressive behavior of square LSST columns were analyzed. Test results involved failure modes, load-displacement behavior, ultimate strength, initial stiffness, and ductility coefficient of all specimens were presented. The corresponding FE models of square LSST columns with crack defect are established and validated by comparison with experimental results. Test results have demonstrated that crack defect often led to stress concentration, causing significantly higher strain intensity at the position of crack defect compared to other areas. Square LSST columns with crack defect exhibited a 26% lower ultimate strength at T = 2.5 mm. The ductility coefficient enhanced with the decrease of length and width of crack defect. However, the location of crack defect had limited effect on axial behavior of LSST columns. In addition, parametric formulae of ultimate strength for square LSST columns with crack defect are proposed, which achieved high accuracy. The research results could provide evaluation reference in design and construction of LSST column.

Keyword :

Axial compression behavior Axial compression behavior Crack defect Crack defect Longitudinal -seam steel tubular (LSST) column Longitudinal -seam steel tubular (LSST) column Ultimate strength Ultimate strength

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GB/T 7714 Zhu, Yao , Xing, Zhiquan , Zhang, Wanpeng et al. Behavior of longitudinal-seam steel tubular columns with crack defect in weld [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 212 .
MLA Zhu, Yao et al. "Behavior of longitudinal-seam steel tubular columns with crack defect in weld" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 212 (2024) .
APA Zhu, Yao , Xing, Zhiquan , Zhang, Wanpeng , Xiong, Chuanxiang , Chen, Yu , Chen, Wei et al. Behavior of longitudinal-seam steel tubular columns with crack defect in weld . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 212 .
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Prediction and correlations estimation of seismic capacities of pier columns: Extended Gaussian process regression models SCIE
期刊论文 | 2024 , 109 | STRUCTURAL SAFETY
WoS CC Cited Count: 1
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Assessing the seismic capacity of pier columns is a crucial element in the performance -based seismic design of bridges. Such assessment necessitates a probabilistic approach to accurately determine the marginal probability distributions of seismic capacities and to characterize the dependencies among these variables. In response to this need, this paper employs Multi -Output Gaussian Process Regression (MO-GPR), a probabilistic machine learning method, to jointly model the multiple seismic capacities of pier columns. We initially introduce a probabilistic seismic capacity model that utilizes MO-GPR for pier columns and validate its predictive accuracy in comparison to Bayesian linear regression and existing empirical methods. Subsequently, the methodology is augmented by the integration of hierarchical modeling within the MO-GPR framework, resulting in a Multi -Output Hierarchical Gaussian Process Regression (MO-HGPR) model that effectively estimates intraclass correlation coefficients for specific types of datasets. It is postulated that these correlation coefficients also reflect correlations associated with multiple components of the real structure. This study employs MO-HGPR and MO-GPR separately to investigate the potential correlations of seismic capacities among pier columns and distinct limit states. The results demonstrate that the MO-GPR model exhibits superior prediction accuracy and more effectively portrays uncertainty compared to existing empirical models. Moreover, the correlations of seismic capacities among piers and limit states are both robust and significantly impact the seismic fragility of bridges. This finding highlights the essential nature of considering capacities correlations in seismic fragility or risk assessment processes.

Keyword :

Damage limit states Damage limit states Gaussian process regression Gaussian process regression Hierarchical model Hierarchical model Pier columns Pier columns Seismic capacity correlation Seismic capacity correlation Seismic fragility Seismic fragility

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GB/T 7714 Mo, Ruchun , Chen, Libo , Chen, Yu et al. Prediction and correlations estimation of seismic capacities of pier columns: Extended Gaussian process regression models [J]. | STRUCTURAL SAFETY , 2024 , 109 .
MLA Mo, Ruchun et al. "Prediction and correlations estimation of seismic capacities of pier columns: Extended Gaussian process regression models" . | STRUCTURAL SAFETY 109 (2024) .
APA Mo, Ruchun , Chen, Libo , Chen, Yu , Xiong, Chuanxiang , Zhang, Canlin , Chen, Zhaowu et al. Prediction and correlations estimation of seismic capacities of pier columns: Extended Gaussian process regression models . | STRUCTURAL SAFETY , 2024 , 109 .
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Study on active earth pressure of narrow backfill of balance weight retaining wall under translational displacement mode SCIE
期刊论文 | 2024 , 18 | DEVELOPMENTS IN THE BUILT ENVIRONMENT
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Abstract :

The balance weight retaining wall is a kind of gravity retaining wall. However, the theoretical results of the earth pressure are relatively few. The failure modes of backfill soil under different factors such as width to depth ratio of fill soil and rock inclination angle were studied by finite element limit analysis. Based on differential element methods and wedge limit equilibrium method, the active earth pressure calculation formula of balance weight retaining wall under translational displacement mode was derived. According to the parameter analysis, the interface friction resistance escalates alongside the rise in the boundary friction angle. The active earth pressure resultant force of the retaining wall increases with the increase of the width to depth ratio of filling, and decreases with the increase of the friction angle of filling. The design of counterweight retaining wall can benefit from the scientific basis and technical reference offered by the research findings.

Keyword :

Active earth pressure Active earth pressure Balance weight retaining wall Balance weight retaining wall Differential element method Differential element method Narrow backfill Narrow backfill Translational displacement Translational displacement

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GB/T 7714 Xiong, Chuanxiang , Xu, Yuanyuan , Xing, Zhiquan et al. Study on active earth pressure of narrow backfill of balance weight retaining wall under translational displacement mode [J]. | DEVELOPMENTS IN THE BUILT ENVIRONMENT , 2024 , 18 .
MLA Xiong, Chuanxiang et al. "Study on active earth pressure of narrow backfill of balance weight retaining wall under translational displacement mode" . | DEVELOPMENTS IN THE BUILT ENVIRONMENT 18 (2024) .
APA Xiong, Chuanxiang , Xu, Yuanyuan , Xing, Zhiquan , Tang, Wenjie , Shao, Yongbo , Zhang, Xin et al. Study on active earth pressure of narrow backfill of balance weight retaining wall under translational displacement mode . | DEVELOPMENTS IN THE BUILT ENVIRONMENT , 2024 , 18 .
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Active earth pressure of narrow cohesionless backfill on balance weight retaining walls rotating about the bottom SCIE
期刊论文 | 2024 , 67 | STRUCTURES
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Balance weight retaining wall is widely used in slope engineering, but its rotation around the heel is not studied at present. In this paper, the finite element limit analysis method is used to study the sliding failure mode of the finite width fill in the rotation displacement mode around the heel of the wall. The results show that the first failure surface is formed at the bottom of the wall, and the second and third failure surfaces are formed at the end of the balance table. According to its failure model, the formula of active earth pressure of balance weight retaining wall in rotation displace-ment mode around the heel is derived based on oblique differential element method. Through the parameter analysis, the effects of filling width-depth ratio, rock dip Angle, friction Angle and weight platform width on the active earth pressure distribution, active earth pressure resultant force and its application point are obtained. The research results can provide theoretical guidance for practical engineering and have certain theoretical significance and practical value.

Keyword :

Active earth pressure Active earth pressure Balance weighted retaining wall Balance weighted retaining wall Finite element Finite element Finite width Finite width

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GB/T 7714 Xiong, Chuanxiang , Tang, Wenjie , Xing, Zhiquan et al. Active earth pressure of narrow cohesionless backfill on balance weight retaining walls rotating about the bottom [J]. | STRUCTURES , 2024 , 67 .
MLA Xiong, Chuanxiang et al. "Active earth pressure of narrow cohesionless backfill on balance weight retaining walls rotating about the bottom" . | STRUCTURES 67 (2024) .
APA Xiong, Chuanxiang , Tang, Wenjie , Xing, Zhiquan , Zheng, Jinhuo , Liu, Yixin , Jiang, Xuezhong et al. Active earth pressure of narrow cohesionless backfill on balance weight retaining walls rotating about the bottom . | STRUCTURES , 2024 , 67 .
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Bridge seismic fragility model based on support vector machine and relevance vector machine SCIE
期刊论文 | 2023 , 52 , 768-778 | STRUCTURES
WoS CC Cited Count: 3
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Abstract :

In the area of bridge seismic fragility studies, the fragility curve is commonly defined as a log-normal cumulative distribution function, and its parameters are usually estimated through two methods. However, the fragility curves derived by one of these two methods may intersect, whereas the other imposes significant restrictions on the shape of the curves. The purpose of this study is to derive fragility curves by utilizing machine learning tools (in particular, tools that are based on multi-classification probabilistic prediction), to address the limitations that are present in existing methodologies. To be more precise, support vector machine for classification (SVC) and relevance vector machine for classification (RVC) are utilized to construct fragility curves, while two other classic methodologies are chosen for comparison and validation. The four approaches were tested on a dataset acquired using numerical analysis, and their performance was measured using Brier -Score and Log-Loss. The results show that both SVC and RVC not only overcome the limitations and outperform the classical method, but also show robustness to arbitrarily partitioned training sets, whereas the classical method sometimes performs poorly.

Keyword :

Bridge seismic fragility Bridge seismic fragility Machine learning tools Machine learning tools Multiclass classification Multiclass classification Probabilistic outputs Probabilistic outputs Relevance vector machine Relevance vector machine Support vector machine Support vector machine

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GB/T 7714 Mo, Ruchun , Chen, Libo , Xing, Zhiquan et al. Bridge seismic fragility model based on support vector machine and relevance vector machine [J]. | STRUCTURES , 2023 , 52 : 768-778 .
MLA Mo, Ruchun et al. "Bridge seismic fragility model based on support vector machine and relevance vector machine" . | STRUCTURES 52 (2023) : 768-778 .
APA Mo, Ruchun , Chen, Libo , Xing, Zhiquan , Ye, Xiaobing , Xiong, Chuanxiang , Liu, Changsheng et al. Bridge seismic fragility model based on support vector machine and relevance vector machine . | STRUCTURES , 2023 , 52 , 768-778 .
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Experimental research on axial mechanical properties of circular CFSST columns after exposure to temperature and sliding SCIE
期刊论文 | 2023 , 57 | STRUCTURES
WoS CC Cited Count: 2
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Abstract :

This paper presents experimental investigations on axial mechanical properties of circular concrete-filled stainless steel tube (CFSST) columns after exposure to temperature and sliding. A total of 117 CFSST specimens were tested under axial compression loading with four factors (i.e., tube thickness, temperature, duration, and concrete compressive strength) considered. Test results indicated that the initial stiffness of circular CFSST short columns was degenerated due to high-temperature sliding. Circular CFSST specimens exhibited a 50.9% lowest residual strength at 1000 degrees C. The influence of high-temperature duration on the residual strength of circular CFSST short columns was limited. The residual strength of specimens was positively correlated with the thickness and concrete compressive strength. All circular CFSST columns after exposure to temperature and sliding experienced an outward local buckling under axial compression. In addition, the parameters formulae of residual strength for circular CFSST columns after exposure to temperature and sliding are proposed, which achieve sufficient accuracy. The research could offer valuable references for strengthening circular CFSST columns after fire.

Keyword :

Circular CFSST Circular CFSST Composite columns Composite columns Initial stiffness Initial stiffness Residual strength Residual strength

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GB/T 7714 Zhu, Yao , Cai, Shihan , Xu, Yuanyuan et al. Experimental research on axial mechanical properties of circular CFSST columns after exposure to temperature and sliding [J]. | STRUCTURES , 2023 , 57 .
MLA Zhu, Yao et al. "Experimental research on axial mechanical properties of circular CFSST columns after exposure to temperature and sliding" . | STRUCTURES 57 (2023) .
APA Zhu, Yao , Cai, Shihan , Xu, Yuanyuan , Xiong, Chuanxiang , Zhang, Canlin , Chen, Yu et al. Experimental research on axial mechanical properties of circular CFSST columns after exposure to temperature and sliding . | STRUCTURES , 2023 , 57 .
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一种桩承扶壁式挡土墙组合结构 incoPat
专利 | 2023-03-30 00:00:00 | CN202320672178.5
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Abstract :

本实用新型公开了一种桩承扶壁式挡土墙组合结构,涉及边坡防护工程技术领域,包括:支承桩、底板以及扶壁式挡土墙,所述扶壁式挡土墙通过所述底板与所述支承桩固定连接。本实用新型桩承扶壁式挡土墙组合结构能充分利用其上部填筑土的自身重量,使得下部支承桩抗倾覆、抗滑移能力显著提高,整体稳定性增强,实现组合结构功能远大于单一支挡结构功能之和。

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GB/T 7714 熊传祥 , 陈誉 , 黄伟达 et al. 一种桩承扶壁式挡土墙组合结构 : CN202320672178.5[P]. | 2023-03-30 00:00:00 .
MLA 熊传祥 et al. "一种桩承扶壁式挡土墙组合结构" : CN202320672178.5. | 2023-03-30 00:00:00 .
APA 熊传祥 , 陈誉 , 黄伟达 , 邢智权 , 刘红位 , 汤文杰 et al. 一种桩承扶壁式挡土墙组合结构 : CN202320672178.5. | 2023-03-30 00:00:00 .
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一种多重阻尼减震耗能限位装置 incoPat
专利 | 2023-04-07 00:00:00 | CN202320745368.5
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本实用新型公开一种多重阻尼减震耗能限位装置,属于建筑减震技术领域,包括:X形耗能器装置、活动钢板块装置、第一钢挡块装置、第二钢挡块装置、铰杆和阻尼器;第一X形耗能器两侧与铰杆铰接,铰杆另一端与第二X形耗能器铰接,活动钢板块装置包括活动钢板块和竖钢板,竖钢板固定在钢板块底端,活动钢板块在第一侧板中滑动,第二X形耗能器通过铰杆与活动钢板块一端铰接,竖钢板位于第一侧板和第二侧板之间,第一X形耗能器与活动钢板块,以及第二X形耗能器之间通过阻尼器连接。本实用新型能够利用X形耗能器装置、阻尼器和弹簧的伸缩变形进行多重能量的损耗的同时,还能够进行横向和竖向的限位。

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GB/T 7714 聂仁杰 , 陈誉 , 黎学桐 et al. 一种多重阻尼减震耗能限位装置 : CN202320745368.5[P]. | 2023-04-07 00:00:00 .
MLA 聂仁杰 et al. "一种多重阻尼减震耗能限位装置" : CN202320745368.5. | 2023-04-07 00:00:00 .
APA 聂仁杰 , 陈誉 , 黎学桐 , 邢智权 , 孙士远 , 许源源 et al. 一种多重阻尼减震耗能限位装置 : CN202320745368.5. | 2023-04-07 00:00:00 .
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一种空间自复位减震耗能装置 incoPat
专利 | 2023-04-07 00:00:00 | CN202320746549.X
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本实用新型公开了一种空间自复位减震耗能装置,属于建筑减震技术领域。包括:第一圆环支撑机构、弧形耗能机构、第二圆环支撑机构、阻尼器、第三圆环支撑机构、铰杆、第一挡块机构、第二挡块机构以及支撑板,第一圆环支撑机构通过弧形耗能机构连接第二圆环支撑机构,第三圆环支撑机构内壁通过阻尼器连接第二圆环支撑机构,第一圆环支撑机构通过铰杆连接第三圆环支撑机构,第一挡块机构一端连接第三圆环支撑机构外侧,另一端通过第一弹簧连接第二挡块机构,第二挡块机构顶面通过第二弹簧连接支撑板。本实用新型通过多个机构进行组合耗能,能在建筑物震动时吸收更多的能量,也能够在建筑物震动结束后实现装置自身复位。

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GB/T 7714 陈誉 , 黎学桐 , 邢智权 et al. 一种空间自复位减震耗能装置 : CN202320746549.X[P]. | 2023-04-07 00:00:00 .
MLA 陈誉 et al. "一种空间自复位减震耗能装置" : CN202320746549.X. | 2023-04-07 00:00:00 .
APA 陈誉 , 黎学桐 , 邢智权 , 许源源 , 聂仁杰 , 孙士远 et al. 一种空间自复位减震耗能装置 : CN202320746549.X. | 2023-04-07 00:00:00 .
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一种钢-混凝土组合管结构施工封堵装置及其方法 incoPat
专利 | 2023-09-28 00:00:00 | CN202311270127.0
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本发明公开了一种钢-混凝土组合管结构施工封堵装置及其方法,涉及结构工程领域,包括支撑架,所述导向滑块的一侧设置有位于放置台上方的交替封堵件。本发明通过设置交替封堵件,当外封堵板与钢管、外侧模板的顶端接触后,转动拨位轴,拨位轴进行转动时通过蜗杆、蜗轮、传动轴、换向齿轮来使第二传动齿条与第一传动齿条相向移动,从而对钢管的顶端进行封堵,防止在将超高性能混凝土倒入钢管与外侧模板之间时流入钢管内,同理可使外封堵板对钢管与外侧模板之间进行封堵,从而达到对钢管的顶端、钢管与外侧模板之间的空隙进行交替封堵的效果,防止了在对钢‑混凝土组合管结构进行浇筑时超高混凝土与普通混凝土之间发生掺杂。

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GB/T 7714 邢智权 , 孙士远 , 陈誉 et al. 一种钢-混凝土组合管结构施工封堵装置及其方法 : CN202311270127.0[P]. | 2023-09-28 00:00:00 .
MLA 邢智权 et al. "一种钢-混凝土组合管结构施工封堵装置及其方法" : CN202311270127.0. | 2023-09-28 00:00:00 .
APA 邢智权 , 孙士远 , 陈誉 , 吴晓磊 , 张晓勇 , 李晓娟 et al. 一种钢-混凝土组合管结构施工封堵装置及其方法 : CN202311270127.0. | 2023-09-28 00:00:00 .
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