Article
Construction & Building Technology
Liquan Gu, Yonghui Wang, Ximei Zhai
Summary: A new sacrificial cladding, named foam concrete-filled square tubes (FCFST sacrificial cladding), was developed to absorb impact energy. Experimental and simulation analysis were conducted to study the deformation modes, force-displacement responses, and energy absorption performances of the FCFST sacrificial claddings. The results showed that increasing the contact area between the sacrificial cladding and impactor enhanced the energy absorption performance, and foam concrete-filled tubes dissipated more impact energy than other parts of the cladding.
Article
Engineering, Mechanical
Hongyuan Zhou, Jiale Fan, Xiaojuan Wang, Guowei Ma, Shangjiang Yu, Yonghui Wang
Summary: In this study, a sacrificial cladding with foam concrete filled aluminum tube as the core is proposed for structural protection against blast load. The energy absorption capacity of the cladding is experimentally investigated through quasi-static compressive test and blast test. Numerical investigations are also conducted to analyze the effect of foam concrete density, aluminum tube thickness, and tube spacing on the cladding's protective performance. The results show that foam concrete density and tube squeezing significantly influence the energy absorption capacity, and increasing foam concrete density improves the protective performance. Increasing foam concrete density and aluminum tube thickness, and reducing tube spacing can effectively reduce the energy input to the system.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Hao Zhang, Baixue Chang, Kefeng Peng, Jilin Yu, Zhijun Zheng
Summary: This study investigates the anti-blast response of density-graded foam-filled tubes as a core layer for sacrificial cladding. The results demonstrate that the negatively graded foam-filled tube with a small density gradient is a good choice for designing anti-blast sacrificial cladding with a small critical length and low transmitted force. Additionally, a contour map is established to determine the critical length required to absorb the impulse of blast loading for different gradient parameters and outer tube dimensions. This study provides a new design guideline for superior blast resistance structures in engineering applications.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Yu Zhang, Yufeng Wen, Ben Liu, Xianlong Wen, Zhejian Li, Hong Hao, Wensu Chen
Summary: This study investigates the blast mitigation performance of kirigami corrugated (KC) panels filled with polyurethane foam as sacrificial cladding. The effects of filling polyurethane foam on the energy absorption capacity and deformation of KC units were analyzed experimentally. Blast simulations were then conducted to compare the protective effectiveness of different types of cladding.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Jingyi Lu, Yonghui Wang, Ximei Zhai, Xudong Zhi, Hongyuan Zhou
Summary: A novel cladding sandwich panel with aluminum foam-filled tubular cores was proposed to enhance impact resistance, with a study showing that the aluminum foam and tubular cores dissipate the majority of impact energy. Improvements in impact force and energy absorption were found by filling aluminum foam, increasing density, and increasing contact area between impactor and panel. Impact position had little effect on energy absorption when away from panel edge, and similar thickness between flat steel plate and tubular cores generally resulted in better energy absorption performances.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Jianxun Zhang, Jinlong Du, Fuxing Miao, Haoyuan Guo
Summary: This paper studies the large deflection of the slender circular metal foam-filled tube under transverse loading through theoretical and numerical analysis. The yield criterion and analytical solution for the plastic behavior of the foam-filled tube are proposed, considering the interaction between bending, stretching, and foam strength. The numerical results confirm the accuracy of the analytical model. The influences of various factors on the load-carrying capacity and energy absorption of the foam-filled tubes are discussed in detail.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Xiaojuan Wang, Kuncheng Jia, Yan Liu, Hongyuan Zhou
Summary: In this study, a layered graded foam concrete-filled auxetic honeycomb was proposed for multi-level structural protection. The effect of cell-wall thickness gradient and foam concrete filler density gradient on response mode, load transfer, energy absorption, and Poisson's ratio was investigated. The graded composite exhibited a layered deformation mode and a negative Poisson's ratio effect, reducing peak load and mitigating load transfer.
Article
Engineering, Multidisciplinary
Ruyang Yao, Tong Pang, Siyuan He, Qing Li, Bei Zhang, Guangyong Sun
Summary: This study proposes a novel energy absorber by mimicking the structural characteristics of animal long bone, and investigates its performance and deformation mechanism through experiments and numerical simulations. A theoretical model is also developed to predict its performance.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Mechanical
Xuke Lan, Guangyan Huang, Xiaobing Bian, Yan Liu
Summary: In order to improve the impact resistance and energy absorption capacity of hybrid-chiral honeycomb beams, foam-filled hybrid-chiral honeycomb beams were designed and fabricated. The foam-filled beams showed enhanced impact resistance and higher specific energy absorption value compared to the empty beams. The impact resistance of the foam-filled beams can be effectively improved by using a gradient cell-wall thickness arrangement.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Xin Ren, Yi Zhang, Chuan Zhen Han, Dong Han, Xiang Yu Zhang, Xue Gang Zhang, Yi Min Xie
Summary: By filling rigid polyurethane foam into hollow auxetic tubes, this study successfully enhanced the energy absorption capacity. The composite foam-filled auxetic tubes demonstrated superior energy absorption compared to single foams and hollow tubes. Geometrical parameters such as wall thickness and ellipticity significantly impact the structural deformation mode and energy absorption of the FFATs.
THIN-WALLED STRUCTURES
(2022)
Article
Construction & Building Technology
Xin Ren, Dong Han, Long Sun, Xue Gang Zhang, Wei Jiang, Zhi Tao, Yi Min Xie, Fan Yang, Guo Xing Lu
Summary: Aluminum foam-filled circular auxetic metamaterials were designed and investigated in this study. The mechanical properties and deformation modes of the proposed aluminum foam-filled auxetic tubes were analyzed using experimental and numerical methods. The energy contribution ratio of the interaction between the aluminum foam and auxetic tube improves with the aluminum foam's density. The AFFAT with a higher ratio of the elliptical major axis to the minor axis has increased compression load efficiency. Among the investigated composite structures, the AFFAT has the highest compression load efficiency.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Yang Wei, Shuaifeng Tang, Si Chen, Qiudong Wang, Jiaqing Wang
Summary: This paper proposes a new type of polyurethane foam-filled bamboo composite tube and conducts experimental research on it. The results show that the foam filler can enhance the stability and bearing capacity of the tube, but not all foam-filled tubes are superior to unfilled tubes. Reducing the height of the bamboo composite tube and increasing the number of winding layers can effectively increase the positive effect of the foam filler on energy absorption.
Article
Materials Science, Multidisciplinary
Shuguang Yao, Zhifang Chen, Ping Xu, Zhixiang Li, Ziliang Zhao
Summary: The study found that foam-filled hybrid structures could change the deformation mode and improve stability during the compression process, as well as increase energy absorption compared to individual components. Among different configurations, the structure with polyurethane foam filler between an outer CFRP tube and an inner CFRP tube had the highest energy absorption capacity.
Article
Mechanics
Rui Liang, Xi Liu, Yuanzhi Hu, Chengyue Jiang, Christophe Bastien
Summary: This paper presents a new methodology to investigate the crashworthiness potential of a series of novel foam-filled twelve right angles thin-walled structures (FTRATS) with different topological distributions. The complex proportional assessment (COPRAS) method was used to select the FTRATS configuration with the highest potential, followed by an optimization using adaptive multi-population genetic algorithm methods. The solution obtained improved the crashworthiness properties of the FTRATS, with increased crash load efficiency, reduced peak crushing force, and increased specific energy absorption.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Mao Yang, Bin Han, Yongjian Mao, Jun Zhang, Tian Jian Lu
Summary: This study proposed polymeric foam filled truncated metallic conical sandwich shells with corrugated cores and systematically investigated their energy absorption characteristics under axial compression. The results showed that the foam filled structures exhibited higher energy absorption than the unfilled counterpart, with the foam filling corrugated channel structure showing the best specific energy absorption performance.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Hong Hao, Tuan T. Ngo, Thong M. Pham, HuaWei Li
Summary: This study investigated the performances of a new type of precast beam-column joint under earthquake and impact loads, utilizing new materials for sustainability and durability considerations. Experimental results showed comparable or better performances compared to traditional joints. Numerical simulations were also conducted to determine optimal concrete-end-plate thickness and explore the influences of various parameters on joint performances.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Construction & Building Technology
Chong Lian, Yubo Wang, Shan Liu, Hong Hao, Yifei Hao
Summary: This paper presents an experimental study on the dynamic mechanical properties of alkali-activated concrete (AAC) with different strengths. The results show that the compressive and tensile properties of AAC are significantly affected by strain rate, and the strength grade also affects its strain rate sensitivity. The existing empirical relations for strain rate effect in ordinary Portland cement concrete (OPC) are not applicable to AAC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Lu-Xi Li, Chao Li, Hong Hao
Summary: This study provides a comprehensive assessment on the seismic performance of post-tensioned self-centering (PTSC) frames under near-fault pulse-like ground motions (NPGMs). The effects of pulse period and energy dissipation on the PTSC frames are analyzed, and recommendations for the design of PTSC frames are provided based on the results.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Qilin Li, Yang Wang, Yanda Shao, Ling Li, Hong Hao
Summary: In this paper, a comparative study is conducted to identify the most effective machine learning model for blast loading prediction. The results show that the Transformer model achieves the best performance in BLEVE pressure prediction, with a relative error of 3.5% and R2 value of 0.997, outperforming the existing MLP approach (relative error 6.0%, R2 value 0.985). This study demonstrates that the Transformer network is an effective tool for predicting blast loading from BLEVE and other explosion sources.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Zhejian Li, Yufeng Wen, Xianlong Wen, Hong Hao, Wensu Chen
Summary: This study investigates the influence of geometric configurations on the impact resistance performance of single and double-layered kirigami corrugated (KC) sandwich panels. A kirigami corrugate unit is formed by folding a portion of the cell wall of a conventional corrugated unit, resulting in significantly improved resistance. The impact resistance performances of 38 numerical configurations of the panels are evaluated, and it is found that single-layered KC panels with more fold-ins demonstrate superior impact resistance, while the impact resistance of double-layered KC panels is not directly linked to the stacking configuration and layer orientation.
Article
Mechanics
Yu Liu, Hong Hao, Yifei Hao
Summary: The bond behavior between steel bar and concrete significantly affects the response of reinforced concrete structures under static and dynamic loads. While numerous studies have investigated the static bond behavior, the research on dynamic bond strength is limited. This study numerically investigates the dynamic bond-slip behavior using finite element modeling and finds that concrete splitting dominates the failure mode. The ultimate bonding load increases with loading rate and is influenced by concrete strength and cover depth to rebar diameter ratio. An empirical relation is proposed based on the numerical results. A case study demonstrates the influence of dynamic bond strength on the numerical prediction of structural responses under dynamic loading.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Civil
Yanda Shao, Ling Li, Jun Li, Qilin Li, Senjian An, Hong Hao
Summary: This paper proposes a new system for measuring 3D vibration displacement using a single camera. Instead of using multi-view geometry, deep neural networks are utilized to learn the depth of scenes from monocular images. Experimental results demonstrate that the proposed monocular 3D displacement system is able to produce reasonable 3D full-field displacement measurement, with obvious advantages in cost and convenience compared to traditional sensor-based or multi view CV-based methods.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Paing Htet, Wensu Chen, Hong Hao, Faiz Shaikh
Summary: In this study, a new hybrid fibre-reinforced recycled aggregate concrete (FRRAC) was developed using recycled macro polypropylene fibre (PF) and micro basalt fibre (BF). The results showed that the proposed hybrid fibre combinations improved the mechanical properties of recycled aggregate concrete (RAC), with a recommended combination of 6 kg/m3 PF and 6 kg/m3 BF.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Feng Shi, Thong M. Pham, Rabin Tuladhar, Zongcai Deng, Shi Yin, Hong Hao
Summary: This study investigates the structural performance of concrete slabs and beams reinforced with different types of reinforcement. Various types of reinforcement, including steel meshes, steel fibers, and macro polypropylene fibers, were studied. The study examines the fracture behavior of ground slabs and the impact of PP and steel fibers on load-strain, load-deflection responses, deflection profiles, and crack patterns. The study also compares the flexural behavior of fiber-reinforced concrete beams to assess the effectiveness of different fibers. The findings show that steel fiber or steel mesh reinforced slabs exhibit significantly increased flexural strength, while PP fiber-reinforced slabs show favorable performance in post-cracking and energy absorption. The use of these reinforcements can improve the flexural cracking strength of concrete slabs. However, predictions based on the physical properties of steel mesh overestimate the flexural strength of ground slabs, while predictions for PP fiber-reinforced slabs and steel fiber-reinforced slabs are higher than the experimental results. This study provides valuable insights for the design and construction of reinforced concrete structures.
Article
Engineering, Geological
Jinqiang Li, Zilan Zhong, Shurui Wang, Kaiming Bi, Hong Hao
Summary: The corrosion-protection liner technology improves the seismic performance of water supply pipelines and reduces the failure probability under earthquake excitations.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Civil
Lalin Lam, Wensu Chen, Hong Hao, Zhejian Li
Summary: This study proposes a novel approach to enhance the crushing efficiency and energy-absorbing performance of origami metastructure by incorporating shear thickening fluid (STF). The numerical investigation using LS-DYNA shows that the proposed STF-filled origami metastructure can generate a higher and more steady crushing force without inducing a significantly high initial peak force. The filled height and viscosity of STF, as well as the origami folding angle, significantly affect the energy-absorbing efficiency and crushing performance of the structure.
ENGINEERING STRUCTURES
(2024)
Review
Mechanics
Nicolas Contreras, Xihong Zhang, Hong Hao, Francisco Hernandez
Summary: This paper provides a comprehensive review on the latest progress and potential applications of locally resonant metamaterials in civil engineering. The concepts and historical origins of metamaterials are introduced, along with the overview of analytical approaches and commonly used structures. Research gaps and future directions are also identified and discussed.
COMPOSITE STRUCTURES
(2024)
Article
Computer Science, Interdisciplinary Applications
Qilin Li, Zitong Wang, Ling Li, Hong Hao, Wensu Chen, Yanda Shao
Summary: Prediction of structural responses is crucial for analyzing structural behavior, but existing approaches have limitations. In this study, a novel machine learning approach based on graph neural networks is proposed, which can efficiently and accurately predict structural dynamics.
COMPUTERS & STRUCTURES
(2023)
Article
Engineering, Industrial
Qilin Li, Yang Wang, Wensu Chen, Ling Li, Hong Hao
Summary: This paper proposes an innovative machine learning approach using Graph Neural Networks (GNNs) to predict overpressure wave propagation generated by Boiling Liquid Expanding Vapor Explosion (BLEVE). The results show that GNN can accurately predict BLEVE overpressure wave propagations with significantly less computational effort compared to traditional methods. The GNN model demonstrates higher temporal resolution and superior generalizability to unseen data.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2024)
