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SSRN 2023年

作者： Shi, Chenglong Zhang, Jigang Liu, Feifei Chen, Wenli Zhao, Guoliang Gu, Chi Song, Hanyu School of Civil Engineering Qingdao University of Technology Qingdao266520 China Co-operative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao266033 China Key Lab of Structures Dynamic Behavior and Control the Ministry of Education Harbin Institute of Technology Harbin150090 China Qingdao First Municipal Engineering Co. Ltd. Qingdao266000 China China Shanghai Architectural Design &Research Institute Co. Ltd. Shanghai200062 China

In recent years, the global offshore wind turbines(OWTs) have been developing rapidly towards the deep sea. Offshore wind turbines are at risk of ship collisions during their installation and operation. In this paper, the pendulum impact test and finite element simulation analysis are carried out to study the impact load resistance of steel truss foundation of offshore wind turbine in Bohai Sea. The impact resistance of steel truss foundation was analyzed from the parameters of failure modes, impact response and energy dissipation capacity through multiple pendulum impact tests. The results show that after two impacts the stiffness of the impact leg is significantly reduced and even fracture at its foot. The branch tube near the point of impact are squeezed and bent, and the deformation and acceleration peak of the impact position are the largest. The denting of the impact leg is the main energy dissipation mechanism. An energy dissipation coefficient is proposed which can help to predict such a structure’s impact resistance. These data provide an experimental basis for improving the impact resistance of full-scale offshore wind turbine structures. © 2023, The Authors. All rights reserved.

关键词： Energy dissipation

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Compressive Strength Evaluation of Concrete Confined With Spiral Stirrups by Using Adaptive Neuro-fuzzy Inference System (ANFIS)

Research Square

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Research Square 2021年

作者： Chang, Wei Zheng, Wenzhong Key lab of Structures Dynamic Behavior and Control Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters The Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China School of Civil Engineering Harbin Institute of Technology Harbin150090 China

The compressive strength of concrete confined with spiral stirrups was an important parameter to evaluate the load-bearing capacity of concrete columns. The confinement provided by spiral stirrups let concrete under the triaxial compression state and improved the compressive strength of concrete. However, the relationships between concrete and stirrups were complex and the existing prediction models for evaluating the compressive strength of confined concrete were various. In this paper, an adaptive neural-fazzy inferenxe system (ANFIS) model was developed to evaluate the compressive strength of concrete confined with stirrups. A set of 231 experimental results of concrete confined with spiral stirrups were collected from the previous studies to establish a reliable database. The investigated parameters included the aspect ratio of specimens, the diameter, spacing, yield strength, and volumetric ratio of stirrups, the ratio of longitudinal reinforcement, and the compressive strength of concrete. The results showed that the ANFIS model predicted the compressive strength of confined concrete accurately. By comparing with existing models, the proposed ANFIS model had high applicable and reliability. The effects of the investigated parameters on the compressive strength of concrete were analyzed based on the proposed ANFIS model. © 2021, CC BY.

关键词： Compressive strength

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Passive Perforated Pipe control Method for Wind?Induced Vibration of a High?Rise Chemical Tower

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Transactions of Nanjing University of Aeronautics and Astronautics 2020年第1期37卷 99-107页

作者： LU Shanshan ZHANG Zhifu ZHANG Runtao CHEN Wenli Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin 150090P.R.China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of TechnologyHarbin 150090P.R.China

Vortex-induced vibration is likely to occur when subjected to wind loads because of low horizontal stiffness,resulting in internal force and large lateral ***-term wind-induced vibration can not only affect the normal service and durability performance of chemical towers,but also seriously endanger the safety of towers in service periods,and cause property *** this study,a passive control method for suppressing wind-induced vibration of chemical towers is *** flow around the flow field is guided by a pre-set air-blowing channel,thus destroying the unsteady vortex shedding in the wake region of the flow field and achieving the purpose of flow *** accelerometers are used to measure the vibration signal of the chemical tower model with and without the perforated *** control effects of the spacing and the installation position of the perforated pipe are then *** results show that the passive perforated pipe control method can effectively reduce the vibration amplitude of the chemical tower under wind loads,and decrease the potential wind-induced vibration.

关键词： chemical tower wind-induced vibration pneumatic control

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Ground motion inversion utilizing sensor-based structural response time histories with a multi-head attention-enhanced temporal convolutional network

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Engineering Applications of Artificial Intelligence 2025年 156卷

作者： Ali Zar Shuang Li Changqing Li Yicheng Chen Muhammad Akbar Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 China College of Civil Engineering and Architecture Jiangsu University of Science and Technology Zhenjiang Jiangsu China

Accurate measurement of ground motion (GM) time histories is essential for precise structural analysis and safety evaluation. However, high costs, limited availability, and maintenance demands of GM recording devices lead to several challenges. This paper aims to present the Multi-Head Attention-Enhanced Temporal Convolutional Network (MHA-TCN Net), a framework developed for inverting GM from recorded structural response (SR) data during earthquakes. A case study on complex multi-degree-of-freedom (MDOF) structures demonstrates the MHA-TCN Net's ability to predict GM time histories across elastic and various plastic deformation ranges, showcasing its potential for real-time GM inversion. By incorporating a multi-head attention mechanism along with an overlapping subset strategy, the MHA-TCN Net achieves high precision in GM inversion. It consistently demonstrates low validation losses, with the mean absolute error not exceeding 0.063, exhibits test correlation coefficients as high as 0.95, and maintains a mean square error below 0.4 on unseen test datasets. Comparative experiments against the Temporal Convolutional Network, Long Short-Term Memory, Convolutional Neural Network, Gated Recurrent Unit, and Transformer models demonstrate the MHA-TCN Net's faster convergence and superior accuracy for both training and validation phases. Importantly, the proposed approach can handle inherent sensor noise, ensuring reliable performance under challenging field conditions, thereby highlighting the contribution of advanced artificial intelligence methods for engineering applications with constrained data environments. Furthermore, without retuning the network, the model demonstrates high accuracy with limited real-time training datasets, proving its versatility across various real-world datasets, especially in areas with SR sensors but few seismic instrumentations.

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An engineering-oriented multi-fidelity surrogate modeling approach using multisource data aggregation in data-scarce environments

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Journal of Building Engineering 2025年 108卷

作者： Wang, Zhaoyong Cao, Zhengfeng Mulyanto, Joshua Adriel Wu, Yue Zheng, Chaorong School of Civil Engineering Harbin Institute of Technology Harbin150090 China China Construction Machinery Co. LTD Hebei Langfang065000 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China

The multi-fidelity surrogate (MFS) model has become an emerging hotspot in engineering prediction and optimization. However, this model typically relies on abundant low-fidelity data (LF data) and a limited amount of high-fidelity data (HF data). In practical engineering, data-scarce environments make it difficult to obtain sufficient LF data, leading to a significant decline in MFS model performance. To address this issue, we propose a multi-fidelity surrogate model based on multi-source data aggregation (MDA-MFS), which effectively balances predictive accuracy and modeling cost. Firstly, we utilize a combination of LF data and HF data to construct a data augmentation strategy, generating medium-fidelity data (CF data), which increases the data diversity and fidelity categories without increasing the sample size. Secondly, we build the MDA-MFS model that integrates LF, CF, and HF data, achieving a balance between modeling efficiency and cost through innovative MFS modeling strategies. We validate the practicality of the MDA-MFS model in the engineering application of wind pressure prediction. Finally, through testing on high-dimensional functions (dimensions of 10, 30, and 100), we demonstrate that the MDA-MFS model has good generalizability and scalability. Our findings are encouraging in that the MDA-MFS model demonstrates excellent prediction accuracy and robust generalization performance. Compared with the MFS model, the MDA-MFS model significantly reduces modeling costs while markedly improving modeling efficiency. More importantly, in light of the growing desire for efficient solutions to prediction or optimization problems in data-scarce environments, our results hold broader significance. © 2025 Elsevier Ltd

关键词： Work simplification

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Design and service performance of FRP anchorage system: A review

Review of Materials Research

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Review of Materials Research 2025年第2期1卷

作者： Yanzhao Niu Guijun Xian Rui Guo Key Lab of Structures Dynamic Behavior and Control (Ministry of Education) Harbin Institute of Technology Harbin 150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 China School of Civil Engineering Harbin Institute of Technology Heilongjiang Harbin 150090 China

Fiber Reinforced Polymer (FRP) materials, with their excellent properties such as lightweight, high strength, and corrosion resistance, have become highly promising materials in modern engineering. However, to fully harness the advantages of FRP, a reliable anchorage system is crucial. This paper provides a comprehensive review of the research on FRP anchorage systems, focusing on static tensile, fatigue and durability properties, exploring the working mechanisms, failure modes and performance influencing factors of anchorage systems. The static tensile properties of anchorages are closely related to the type of anchorages, with mechanical, bonded, composite and self-anchored types anchorage systems each having their own strengths and weaknesses. Regarding fatigue performance, mechanical-type anchorages are prone to interfacial wear and slippage, while bonded and composite types anchorages exhibit shear and slippage failures, and self-anchored systems tend to suffer from localized fracture due to stress concentration. Design optimization and material improvements can help mitigate fatigue damage. Moreover, both FRP and the bonding medium are susceptible to performance degradation or electrochemical corrosion under complex environmental conditions. The bonding performance at the interfaces of anchorage components deteriorates under the combined effects of load and environmental factors, posing a significant threat to the long-term performance of FRP anchorage systems. This study provides valuable insights into the performance of FRP anchorage systems in engineering applications, driving their technical advancement and practical implementation.

关键词： FRP Anchorage system Fatigue properties Durability Damage mechanism

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Local buckling of stainless steel stub columns with novel octagonal hollow sections

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Engineering structures 2025年 338卷

作者： Zhong, Yukai Jiang, Ke Chen, Man-Tai Su, Andi Zhao, Ou Research Center for Wind Engineering and Engineering Vibration Guangzhou University Guangzhou China School of Civil and Environmental Engineering Nanyang Technological University Singapore Department of Civil and Natural Resources Engineering University of Canterbury Christchurch New Zealand State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai200240 China Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure Department of Civil Engineering Shanghai Jiao Tong University Shanghai200240 China Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China

Octagonal hollow section, a novel type of polygonal hollow sections, combines the advantages of traditional circular and rectangular hollow sections while mitigating their limitations, with higher load-carrying capacities over rectangular hollow sections due to smaller plate element widths and better constructability over circular hollow sections owing to multiple flat faces providing operation platforms for welded and bolted connections. The present paper reports experimental and numerical studies on the local buckling behaviour of stainless steel octagonal hollow sections under axial compression. The testing programme included axial compression tests on fifteen stainless steel octagonal hollow section stub column specimens with five different outer cross-section dimensions and three different wall thicknesses, as well as tensile coupon tests and initial local geometric imperfection measurements. In parallel with the testing programme, a numerical modelling programme was carried out, with finite element models developed and validated against the test results and afterwards adopted to carry out parametric studies. The test and numerical data were used to evaluate the applicability of relevant design rules, as specified in the European code, American specification and ASCE standard, to stainless steel octagonal hollow sections. The evaluation results generally revealed that (i) the three sets of codified slenderness limits were unsafe when used for cross-section classification of stainless steel hexagonal hollow sections, (ii) the European code and American specification resulted in overall accurate and consistent cross-section compression resistance predictions for stainless steel octagonal hollow sections, but still with some overly conservative predictions for non-slender cross-sections and slightly unsafe predictions for those at the boundary of non-slender and slender cross-sections, and (iii) the ASCE standard provided overall scattered and inaccurate cross-sec

关键词： Welding codes

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Structural Performance of Smart CFRP-FBG Reinforced Steel Beams

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Journal of Architectural Environment & Structural Engineering Research 2020年第4期3卷 9-15页

作者： Huaping Wang Tao Song Hengyang Li Siyuan Feng School of Civil Engineering and Mechanics Lanzhou UniversityLanzhouGansu730000China Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology) Ministry of EducationHarbinHeilongjiang150090China

Many beam structures suffer from gradual performance degradation with the increase of service *** recover the bearing capacity of these beams,carbon fiber reinforced polymer(CFRP)plates are developed to attached on the beam *** check the structural performance of the CFRP reinforced beams,smart CFRP plate with FBGs in series is designed and LVDTs are adopted to measure the *** deflection of the reinforced beam is given based on the elastic conversion cross-section *** experimental results validate the effectiveness of the proposed *** study shows that the CFRP reinforced zone has a larger flexural rigidity than the pure steel beam *** general distribution of the deflection along the span of the CFRP reinforced beam can be described by the proposed *** provides a scientific design guidance for the deflection control of CFRP reinforced structures.

关键词： CFRP reinforced beam Interfacial interaction Smart CFRP-FBG plate Deflection Experimental investigation

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Interfacial Interaction of CFRP Reinforced Steel Beam structures

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Journal of Architectural Environment & Structural Engineering Research 2020年第4期3卷 2-8页

作者： Huaping Wang Hengyang Li Siyuan Feng Tao Song School of Civil Engineering and Mechanics Lanzhou UniversityLanzhouGansu730000China Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology) Ministry of EducationHarbinHeilongjiang150090China

Due to the increase of service life,the phenomenon of performance degradation of bridge structures becomes more and more *** is important to strengthen the bridge structures so as to restore the resistance level and extend the normal service *** fiber reinforced polymer(CFRP)materials are thus used for the assembly reinforcement of bridges for the advantages of high strength,light weight,corrosion resistance and long-term stability of physical and chemical properties,*** view of this,based on the previous theoretical study and the established formula of the interfacial shear stress of CFRP reinforced steel beam and the normal stress of CFRP plate,this paper discusses the sensitive parameters that affect the interfacial interaction of CFRP strengthened beam *** the analysis,the priority design indicators and suggestions are accordingly given for the design of reinforced beam ***’s modulus of CFRP composite and shear modulus of the adhesive have the greatest influence on the interfacial interaction,which should be carefully *** is suggested that CFRP material with Ec close to 300 GPa and thickness no less than 3 mm,and adhesive material with Ga less than 5 GPa and 3-mm thickness can be adopted in CFRP reinforced steel *** conclusions of this paper can provide guidance for the interfacial damage control of CFRP reinforced steel beam structures.

关键词： CFRP reinforced steel beam Interfacial interaction Shear stress Parametric analysis Design instruction

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Essential Stressing State Features of Laterally Loaded Masonry Wall Panels Revealed from Experimental Displacements

Research Square

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Research Square 2021年

作者： Liu, Bai Li, Rui Zhang, Yu Zhou, Guangchun Key Lab of Structures Dynamic Behavior and Control of China Ministry of Education Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology School of Civil Engineering Harbin Institute of Technology Harbin150090 China Urban and Engineering Disaster Prevention Laboratory Institute of Engineering Mechanics China Earthquake Administration Harbin150086 China

This study reveals the essential and general working features of laterally loaded masonry (LLM) wall panels from their experimental displacements by applying structural stressing state theory. Firstly, the generalized work of force is proposed to express the stressing state mode and its characteristic parameter. Then, the Mann-Kendall criterion is applied to detect the mutation point in the curve of the characteristic parameter with the load increase. Correspondingly, it is verified that the evolution of the stressing state mode also embodies the mutation feature. The stressing state mutation feature is inherent and common as the embodiment of the natural law from quantitative change to qualitative change of a system. The stressing state mutation feature reveals the starting point of structural failure process, which could update the existing definition of structural failure load. Further, the elastoplastic branch (EPB) point is revealed referring to the updated failure load, which might be directly taken as the design load with the rational margin of safety. In a sense, this paper presents a new way to address the classic issue of structural load-bearing capacity uncertainty and to update the existing design codes of LLM wall panels. © 2021, CC BY.

关键词： Fracture mechanics

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