Bailong Li

Jilin University

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Changming Wang

Nantong University

Yanying Li

Northwestern Polytechnical University

Ruiyuan Gao

Huanghe Science and Technology College

Kaleem Ullah Jan Khan

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering

Zhu Liang

Guangzhou Urban Planning Survey & Design Institute

Yiao Liu

Jilin University

Zaishan Wei

Sun Yat-sen University

Xiaoyang Liu

Qilu Hospital of Shandong University

Jianguo Cui

Chongqing University of Technology

Zhiying Han

Zhejiang University

Cooperative Institutions

Chinese Academy of Sciences

Jilin University

Sun Yat-sen University

Shanghai Jiao Tong University

Huazhong University of Science and Technology

Fudan University

Central South University

Nanjing Medical University

Peking University

Universidade Estadual Paulista (Unesp)

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Study on buckling performance of a new type of double-steering prestressed plate-column

Research Square (Research Square) (2023)

Yanying Li Bailong Li

Abstract This study proposes a new type of prestressed stayed column. The traditional prestressed stayed beam-column does not consider the end constraint, whereas the new double-steering prestressed plate column exploits the end constraint while accounting for the middle bending deformation. The sliding form is utilized in this study for the connection part to prevent the prestressed steel cable from breaking at the pole. The results indicated that adding the steering brace improves the core steel column's stable bearing capacity and stiffness. The bearing capacity of the double-steering prestressed plate column is 4.51 times that of the non-prestressed bearing column, 2.43 times that of the characteristic buckling load of the currently prevalent single-transverse prestressed beam-column, and 1.51 times that of the traditional three-transverse prestressed beam-column. The influence of prestress magnitude, effective length, buckling mode, and double-steering plate-column details are investigated. The research findings further enrich and enhance the theory and types of prestressed stayed columns and provide guidance for applying new double-steering prestressed plate-column in practical engineering.

10.21203/rs.3.rs-3078507/v1

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Experimental Study for the Embedded Depth of Support Structure Foundation Pit in Granite Residual Soil Area

Advances in Civil Engineering (2020)

Yiao Liu Changming Wang Ruiyuan Gao Bailong Li Xiaoyang Liu

In order to deeply understand the appropriate embedded depth of the foundation pit diaphragm wall in granite residual soil area, a physical model of the diaphragm wall with inner support for foundation excavation was constructed according to the actual project in the proportion of 1 : 30. The distribution of Earth pressure, the horizontal displacement of the wall, and the settlement behind the wall were obtained by physical experiments. The numerical simulation was then performed to authenticate the results from physical modeling. It was observed that the embedded depth of the diaphragm wall had the most obvious influence on the horizontal displacement of the wall. Moreover, the final soil settlement and its influence were significantly increased with the decrease in embedded depth. The analysis results also suggested that the control value for the embedded depth of the wall should not be less than 0.36 H ( H is the excavation depth of the foundation pit).

Foundation (evidence)

Diaphragm (acoustics)

Lateral earth pressure

Settlement (finance)

10.1155/2020/6645942

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Citations (3)

Determination of Embedded Depth of Soldier Piles in Pile-Anchor Supporting System in Granite Residual Soil Area

Geofluids (2021)

Yiao Liu Changming Wang Xiaoyang Liu Ruiyuan Gao Bailong Li

Reasonable depth of pile embedment is one of the key factors for the success of deep foundation pit projects. This paper has taken a deep foundation pit project in a granite residual soil area in Shenzhen as an example and used physical model tests to study the deformation law of the piles and the surrounding soil during the excavation of the deep foundation pit, revealing the variation law of earth pressure in time and space in the pit and then verified it by numerical simulation. The influence of the embedded depth of the pile on the deformation and earth pressure of the deep foundation pit is then explicitly discussed. The study shows that the embedded depth has a significant effect on the deformation and earth pressure distribution of the foundation pit. The earth pressure in front of the pile tends to approach the passive earth pressure as the embedment depth decreases, while the earth pressure behind the pile is in between the Rankine active earth pressure and the static soil pressure; the settlement value and settlement range of the surrounding soil are doubled. The pile displacement increases as the maximum displacement point rises. The maximum displacement of the pile body was used as the basis for determining the instability of the foundation pit. The optimum embedded depth is obtained when the depth of embedment of the pile is 0.22 H (H is the excavation depth of the foundation pit).

Embedment

Lateral earth pressure

Foundation (evidence)

Settlement (finance)

Degree Rankine

10.1155/2021/5518233

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Citations (6)

Errata

Cellular Physiology and Biochemistry (2016)

Fang-Fang He Chun Zhang Quanxing Shi Zhao Yin Peilin Liu

10.1159/000453141

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Buckling Analysis of a New Type of Double-Steering Prestressed Plate Column

Buildings (2023)

Yanying Li Bailong Li Xinsheng Yin Zhiying Han

A new type of dual-steering prestressed plate column is introduced. Compared to the previous prestressed strut column, this proposed column considers both bending and constraints at ends. The calculation results indicated that the support plate significantly improves the stable bearing capacity and buckling performance of the core steel column. When compared to the proposed column, the bearing capacity of the three-transverse prestressed beam column is 1.51 times smaller, the single-transverse prestressed beam column is 2.43 times lower, and the non-prestressed column is 4.51 times smaller. Moreover, this study examines the influences of effective length, buckling mode, stress nephogram detail, and prestress value. It explores the possibility of implementing this new type of dual-steering prestressed plate column in practical engineering. In addition, the variety and mechanical models of prestressed columns are expanded and refined.

10.3390/buildings13102574

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Citations (1)

Effect of irradiation-induced miR-34a expression on irradiation-sensitivity of cells

Academic Journal of Second Military Medical University (2011)

Ying Cheng Sheng-hui HE Cong Liu Chuanfeng Zhou Jianguo Cui

10.3724/sp.j.1008.2011.00368

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Exploring Complementary Models Consisting of Machine Learning Algorithms for Landslide Susceptibility Mapping

ISPRS International Journal of Geo-Information (2021)

Han Hu Changming Wang Liang Zhu Ruiyuan Gao Bailong Li

Landslides frequently occur because of natural or human factors. Landslides cause huge losses to the economy as well as human beings every year around the globe. Landslide susceptibility prediction (LSP) plays a key role in the prevention of landslides and has been under investigation for years. Although new machine learning algorithms have achieved excellent performance in terms of prediction accuracy, a sufficient quantity of training samples is essential. In contrast, it is hard to obtain enough landslide samples in most the areas, especially for the county-level area. The present study aims to explore an optimization model in conjunction with conventional unsupervised and supervised learning methods, which performs well with respect to prediction accuracy and comprehensibility. Logistic regression (LR), fuzzy c-means clustering (FCM) and factor analysis (FA) were combined to establish four models: LR model, FCM coupled with LR model, FA coupled with LR model, and FCM, FA coupled with LR model and applied in a specific area. Firstly, an inventory with 114 landslides and 10 conditioning factors was prepared for modeling. Subsequently, four models were applied to LSP. Finally, the performance was evaluated and compared by k-fold cross-validation based on statistical measures. The results showed that the coupled model by FCM, FA and LR achieved the greatest performance among these models with the AUC (Area under the curve) value of 0.827, accuracy of 85.25%, sensitivity of 74.96% and specificity of 86.21%. While the LR model performed the worst with an AUC value of 0.736, accuracy of 77%, sensitivity of 62.52% and specificity of 72.55%. It was concluded that both the dimension reduction and sample size should be considered in modeling, and the performance can be enhanced by combining complementary methods. The combination of models should be more flexible and purposeful. This work provides reference for related research and better guidance to engineering activities, decision-making by local administrations and land use planning.

10.3390/ijgi10100639

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Citations (4)

Construction and Evaluation of Wastewater Reclamation Systems in a New Urban Area

China Water & Wastewater (2013)

Bailong Li Xianbao Wang Lei Zhiwei Xiaochang C. Wang

In order to solve the shortage of water resources and realize sustainable development in a new urban area,the reclaimed water demand and composition for municipal reuse and industrial reuse were determined.Two reclaimed water treatment systems using coagulation/sedimentation process and ozonation/floatation process were constructed.While the effluent quality of both processes all met reuse water quality requirements,the ozonation/floatation process was superior to the coagulation/sedimentation process in removal of NH3-N,iron,manganese ion and coliform bacteria.Therefore,the ozonation/floatation process could better achieve reclaimed water diversified utilization and system optimization configuration in water shortage areas,thus relieving the shortage of urban water resources.

Reclaimed water

Sedimentation

Economic shortage

Source

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Citations (2)

A Study on the Elastoplastic Stable Bearing Capacity of Double-Steering Prestressed Plate Columns

Buildings (2023)

Yanying Li Bailong Li Xinsheng Yin Zhiying Han Zhipeng Li

This study investigates the elastoplastic stable bearing capacity of prestressed columns. The end restraint of the novel dual-steering plate brace prestressed column is enhanced, augmenting the efficiency of utilizing steel material. The elastoplastic stable bearing capacity of this new prestressed column is 5.41 times greater than that of a standard non-prestressed column. In contrast, the traditional prestressed columns with identical parameters show only a 2.49 to 3.55 times increase. In addition, this study conducts parameter optimization on the prestressed value, the position of the transverse brace, and the size of the transverse brace in the prestressed column. The buckling load escalates rapidly with an increase in the prestress value within a specific range and then diminishes gradually. The bearing capacity peaks when the transverse brace is positioned at the midpoint. As the size of the transverse brace expands, the load-bearing capacity initially rises linearly and subsequently stabilizes. The findings on the elastoplastic stable bearing capacity and parameter optimization are significantly relevant for practical engineering applications.

10.3390/buildings13123083

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Citations (0)

A random algorithm for 3D modeling of solid particles considering elongation, flatness, sphericity, and convexity

Computational Particle Mechanics (2022)

Songling Han Changming Wang Xiaoyang Liu Bailong Li Ruiyuan Gao

Sphericity

Flatness (cosmology)

Convexity

Particle (ecology)

Elongation

10.1007/s40571-022-00475-9

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Citations (7)