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学者姓名：颜学渊
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Abstract ：
针对现有震害模拟可视化方法建模环节存在的不足,设计一种基于SketchUp草图大师的区域建筑三维建模方法.该方法解决了传统建模方法中过于依赖原始数据和模型维护困难的问题,实现区域建筑建模的灵活性和模型的可维护性.利用OSG三维渲染引擎和Qt框架搭建震害模拟三维动态可视化平台,完成区域建筑震害模拟的三维动态可视化.以福建省福州市台江区某区域为例,对该区域进行三维建筑建模和震害模拟结果的动态可视化展示.结果表明:所提建模方法和平台具有可行性.
Keyword ：
OSG三维渲染引擎 OSG三维渲染引擎 三维动态可视化 三维动态可视化 区域建筑三维建模 区域建筑三维建模 草图大师 草图大师 震害模拟 震害模拟
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| GB/T 7714 | 颜学渊 , 郑欣颖 , 刘旭宏 et al. 基于SketchUp和OSG的区域建筑震害模拟三维动态可视化 [J]. | 华侨大学学报（自然科学版） , 2025 , 46 (1) : 38-45 . |
| MLA | 颜学渊 et al. "基于SketchUp和OSG的区域建筑震害模拟三维动态可视化" . | 华侨大学学报（自然科学版） 46 . 1 (2025) : 38-45 . |
| APA | 颜学渊 , 郑欣颖 , 刘旭宏 , 赵瀚彬 . 基于SketchUp和OSG的区域建筑震害模拟三维动态可视化 . | 华侨大学学报（自然科学版） , 2025 , 46 (1) , 38-45 . |
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Although the concrete-filled double-skin steel tubular (CFDST) columns have received attention in numerous studies, their mechanical properties remain to be further improved. In this paper, CFDST columns were strengthened with steel strips. The axial compression performance of a new type of multi-cavity concrete-filled double-skin steel tube short column was studied through experiments and numerical simulations. This type of column consists of two concentric square steel tubes, a sandwich strip connecting the inner and outer steel tubes, and an inner steel tube strip located on the inner wall of the inner steel tube. A total of 20 short columns were subjected to axial compression, with the main variables being the hollow ratio, height of the inner steel tube strip, concrete strength, and width-to-thickness ratio of the outer steel tube. Based on the test results, the applicability of the finite element model was verified, and extensive parametric analyses were conducted. The results from both the experiments and parametric analyses indicate adding inner steel tube strips can further decrease the degree of local buckling in the steel tubes. Moreover, the heights of the sandwich strip and the inner steel tube strip have a notable influence on the axial compression performance of the new type of short columns. Finally, the experimental and finite element analysis results were used to evaluate the predictive performance of different specification models for the bearing capacity of CFDST, conventional multi-cavity CFDST, and the new type multi-cavity CFDST short columns.
Keyword ：
Axial compression Axial compression Bearing capacity calculation Bearing capacity calculation Experimental study Experimental study Multi-cavity CFDST Multi-cavity CFDST Numerical simulation Numerical simulation
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| GB/T 7714 | Yan, Xueyuan , Shi, Shen , Yu, Jitao et al. Experimental and numerical investigation of multi-cavity concrete-filled double-skin steel tubular short column [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2025 , 227 . |
| MLA | Yan, Xueyuan et al. "Experimental and numerical investigation of multi-cavity concrete-filled double-skin steel tubular short column" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 227 (2025) . |
| APA | Yan, Xueyuan , Shi, Shen , Yu, Jitao , Zheng, Xinying , Liu, Jian , Chen, Wenhui . Experimental and numerical investigation of multi-cavity concrete-filled double-skin steel tubular short column . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2025 , 227 . |
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To overcome the computational inefficiency and inadequate simplification of non-critical regions in traditional refined modeling methods for complex structural analyses, this study proposes a novel multi-scale finite element (NMFE) modeling approach based on the connector element method. This NMFE approach is applied to investigate the seismic performance of a novel prefabricated self-centering energy-dissipative frame (NPSCEDF) that does not require on-site tensioning of prestressed tendons. First, comparison of test results with simulations from the solid finite element (SFE) model, the conventional multi-scale finite element (CMFE) model, and the NMFE model verified that the NMFE model accurately reproduces the plastic damage characteristics of the NPSCEDF under quasi-static loading. Its prediction accuracy for both hysteresis and skeleton curves matches that of the SFE and CMFE models, while its computational efficiency is 93.28 % greater than that of the CMFE model. Subsequently, the NPSCEDF was incorporated into a six-story frame via four different layout schemes, and dynamic time-history analyses under rare earthquake conditions were conducted. The results indicate that the frame adopting the NPSCEDF layout outperforms the conventional frame (CF) in terms of maximum inter-story drift angle, residual drift, base shear, and concrete compressive damage. Among the layout schemes, SC-2 (continuous arrangement from lower stories upward) delivers the best overall performance, fully demonstrating its selfcentering and energy-dissipative capabilities while meeting seismic design requirements.
Keyword ：
Connector element method Connector element method frame frame Multi-scale finite element modeling Multi-scale finite element modeling Prefabricated self-centering energy-dissipative Prefabricated self-centering energy-dissipative Seismic performance Seismic performance
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| GB/T 7714 | Yan, Xueyuan , Yu, Jitao , Jiang, Chuanxin et al. Multi-scale numerical investigation of seismic performance of a novel prefabricated self-centering energy-dissipative frame [J]. | STRUCTURES , 2025 , 78 . |
| MLA | Yan, Xueyuan et al. "Multi-scale numerical investigation of seismic performance of a novel prefabricated self-centering energy-dissipative frame" . | STRUCTURES 78 (2025) . |
| APA | Yan, Xueyuan , Yu, Jitao , Jiang, Chuanxin , Zheng, Xinying , Zhou, Yilin . Multi-scale numerical investigation of seismic performance of a novel prefabricated self-centering energy-dissipative frame . | STRUCTURES , 2025 , 78 . |
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Ultra-high performance seawater sea sand concrete (UHPSSC) is an advanced cementitious composite material with significant potential for coastal and marine infrastructure applications. Marine tidal zones represent one of the most aggressive environments for concrete structures due to coupled chemical-physical degradation mechanisms. This study aims to elucidate the long-term strength evolution mechanisms of UHPSSC under marine tidal zone exposure. Specifically, the mass loss, mechanical properties, and chemically bound water content of UHPSSC and ultra-high performance concrete (UHPC) are evaluated after exposure to seawater/freshwater freeze-thaw cycles and seawater/freshwater dry-wet cycles. Microstructural characterization was employed to elucidate the underlying strength evolution mechanisms. The results demonstrate that the coupling of damage and rehydration governs the strength evolution of UHPSSC and UHPC under tidal zone conditions. Following 1000 freeze-thaw cycles and 360 dry-wet cycles, the mechanical properties and the chemically bound water content of UHPSSC and UHPC increased slightly, but the flexural strength under seawater dry-wet cycling decreased. In particular, after 360 freshwater-dry-wet cycles, the compressive strength, flexural strength, and chemically bound water content of UHPSSC increased by 18.7 %, 14.2 %, and 21 %, respectively. For UHPC, the corresponding increases were 16.2 %, 30.6 %, and 20 %, respectively. The effect of tidal zone erosion on the mass was negligible, with a maximum of no more than 0.9 %. Remarkably, even after 1000 freeze-thaw cycles and 360 dry-wet cycles, the steel fibers within the UHPSSC matrix were uncorroded. Both UHPSSC and UHPC exhibited exceptional erosion resistance in marine tidal environments.
Keyword ：
concrete concrete Dry-wet cycle Dry-wet cycle Freeze-thaw cycle Freeze-thaw cycle Marine environment Marine environment Rehydration Rehydration Ultra-high-performance seawater sea sand Ultra-high-performance seawater sea sand
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| GB/T 7714 | Liu, Xinghao , Chen, Zaixian , Yan, Xueyuan et al. Damage-rehydration synergy in strength evolution of ultra-high performance seawater sea sand concrete under marine tidal zones [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 111 . |
| MLA | Liu, Xinghao et al. "Damage-rehydration synergy in strength evolution of ultra-high performance seawater sea sand concrete under marine tidal zones" . | JOURNAL OF BUILDING ENGINEERING 111 (2025) . |
| APA | Liu, Xinghao , Chen, Zaixian , Yan, Xueyuan , Chen, Pang , Zhang, Yingzi . Damage-rehydration synergy in strength evolution of ultra-high performance seawater sea sand concrete under marine tidal zones . | JOURNAL OF BUILDING ENGINEERING , 2025 , 111 . |
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Ferronickel slag and ground granulated blast-furnace slag (GGBFS) are solid waste by-products from the metallurgical industry. When incorporated into concrete, they help promote resource utilization, reduce hydration heat, and lower both solid waste emissions and the carbon footprint. To facilitate the application of ferronickel slag–GGBFS concrete in 3D printing, this study examines how aggregate size and nozzle diameter affect its performance. The investigation involves in situ printing, rheological characterization, mechanical testing, and scanning electron microscopy (SEM) analysis. Results indicate that excessively large average aggregate size negatively impacts the smooth extrusion of concrete strips, resulting in a cross-sectional width that exceeds the preset dimension. Excessively small average aggregate size results in insufficient yield stress, leading to a narrow cross-section of the extruded strip that fails to meet printing specifications. The extrusion performance is closely related to both the average aggregate size and nozzle diameter, which can significantly influence the normal extrusion stability and print quality of 3D printed concrete strips. The thixotropic performance improves with an increase in the aggregate size. Both compressive and flexural strengths improve with increasing aggregate size but decrease with an increase in the printing nozzle size. Anisotropy in mechanical behavior decreases progressively as both parameters mentioned increase. By examining the cracks and pores at the interlayer interface, this study elucidates the influence mechanism of aggregate size as well as printing nozzle parameters on the mechanical properties of 3D printed ferronickel slag–GGBFS concrete. This study also recommends the following ranges. When the maximum aggregate size exceeds 50% of the nozzle diameter, smooth extrusion is not achievable. If it falls between 30% and 50%, extrusion is possible but shaping remains unstable. When it is below 30%, both stable extrusion and good shaping can be achieved. © 2025 by the authors.
Keyword ：
Carbon footprint Carbon footprint Compressive strength Compressive strength Concrete aggregates Concrete aggregates Extrusion Extrusion Mechanical testing Mechanical testing Nozzles Nozzles Scanning electron microscopy Scanning electron microscopy Slags Slags Solid wastes Solid wastes
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| GB/T 7714 | Wang, Suguo , Wang, Xing , Yan, Xueyuan et al. Effects of Aggregate Size and Nozzle Diameter on Printability and Mechanical Properties of 3D Printed Ferronickel Slag–GGBFS Concrete [J]. | Materials , 2025 , 18 (15) . |
| MLA | Wang, Suguo et al. "Effects of Aggregate Size and Nozzle Diameter on Printability and Mechanical Properties of 3D Printed Ferronickel Slag–GGBFS Concrete" . | Materials 18 . 15 (2025) . |
| APA | Wang, Suguo , Wang, Xing , Yan, Xueyuan , Chen, Shanghong . Effects of Aggregate Size and Nozzle Diameter on Printability and Mechanical Properties of 3D Printed Ferronickel Slag–GGBFS Concrete . | Materials , 2025 , 18 (15) . |
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In this paper, a self-centering joint between the concrete-filled double steel tubular (CFDST) column and the steel beam is proposed. The joint was self-centered by prestressed strands when unloading, and energy was dissipated during loading by friction. This work is a numerical and theoretical exploratory study based on a modeling approach already validated by experiments, aiming to investigate the mechanical behavior of the novel self-centering joint and optimize its design parameters. The reasonableness of the joint model was verified by numerical simulation with ABAQUS finite element software, and the damage modes, hysteresis curves, and energy dissipation capacity of the joint were analyzed. A mechanism-based semi-theoretical restoring force model was established. Performed a parametric analysis on the primary factors influencing the mechanical behavior of the joint. The results indicated that there was a contradiction between self-centering performance and energy dissipation in the joint, and the ratio beta between the moment resistance provided by the strands and that provided by the friction devices in the decompression moment of the joint played a key role in moderating the relationship between the two. A value of beta between 1 and 1.5 was recommended for a balance between the two. The restoring force model of the joint provided a well-predicted mechanical behavior of the joint. The modified rigid model was more consistent with the numerical results. This study provided theoretical support and optimized design parameters for the design of CFDST column-steel beam joints with favorable self-centering performance and energy dissipation capability. The parameter analysis showed that increasing strand prestress increased the bearing capacity but potentially resulted in stress loss; an increase in friction force improved the bearing capacity and energy dissipation capacity, yet it augmented residual deformation; and an enlargement of the crosssectional area bolstered both the bearing capacity and stiffness, albeit it also led to stress loss.
Keyword ：
CFDST column-steel beam joint CFDST column-steel beam joint Energy dissipation Energy dissipation Numerical analysis Numerical analysis Prestress Prestress Self-centering Self-centering
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| GB/T 7714 | Yan, Xueyuan , Yu, Jitao , Wang, Genliang et al. Numerical and theoretical investigation on the cyclic behavior of self-centering CFDST column-steel beam joints [J]. | STRUCTURES , 2025 , 81 . |
| MLA | Yan, Xueyuan et al. "Numerical and theoretical investigation on the cyclic behavior of self-centering CFDST column-steel beam joints" . | STRUCTURES 81 (2025) . |
| APA | Yan, Xueyuan , Yu, Jitao , Wang, Genliang , Chen, Wenhui , Shi, Shen . Numerical and theoretical investigation on the cyclic behavior of self-centering CFDST column-steel beam joints . | STRUCTURES , 2025 , 81 . |
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This paper aims to examine the seismic response of prestressed self-centering moment-resisting frames (PSC-MRFs) based on concrete-filled double steel tubular (CFDST) columns and RC beams. The beam of this novel connection is divided into two parts, connected by bolts and tendons, and the beam includes a gap opening feature, which could be regarded as a normal single beam in the field. Cyclic loading analysis was performed on one-story frames with different initial parameters arranged in adjacent bays. Nonlinear dynamic analysis was conducted on a six-story frame under two seismic hazard levels. The cyclic loading analysis showed favorable self-centering performance of the frame even when the hysteretic energy dissipation ratio reached 0.808. Seismic analysis results showed that compared with the in situ reinforced concrete frame, PSC-MRFs generally had similar maximum inter-story drifts under fortification earthquakes, but the residual inter-story drifts were reduced by 33%; under rare earthquakes, the maximum inter-story drifts and residual inter-story drifts of PSC-MRFs were reduced by 22% and more than 90%, respectively. In the adjacent bays on the same story of PSC-MRFs, connections with smaller imminent moments of gap opening opened earlier under earthquake, and the maximum opening angle was larger. The general seismic performance and self-centering of PSC-MRFs was significantly more advantageous than that of in situ reinforced concrete frames.
Keyword ：
CFDST columns CFDST columns dynamic response dynamic response gap opening gap opening hysteretic energy dissipation hysteretic energy dissipation numerical simulation numerical simulation prestress prestress self-centering self-centering
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| GB/T 7714 | Yan, Xueyuan , Shi, Shen , Mao, Huimin et al. Seismic Response of Prestressed Self-Centering Moment-Resisting Frames [J]. | BUILDINGS , 2024 , 14 (12) . |
| MLA | Yan, Xueyuan et al. "Seismic Response of Prestressed Self-Centering Moment-Resisting Frames" . | BUILDINGS 14 . 12 (2024) . |
| APA | Yan, Xueyuan , Shi, Shen , Mao, Huimin , Lin, Zhongnan . Seismic Response of Prestressed Self-Centering Moment-Resisting Frames . | BUILDINGS , 2024 , 14 (12) . |
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The seismic fragility of prefabricated self-centering frame structures composed of self-centering joints is investigated for reference in their seismic design and application. In this paper, a new design of the concrete-filled double steel tubular column-RC beam joint with self-centering capability and friction energy dissipation was proposed. The joint was modeled with ABAQUS and OpenSees, and hysteretic simulation was carried out to verify the reasonableness and accuracy of the OpenSees phenomenological model. Based on the OpenSees platform, a one-bay, six-story prefabricated self-centering frame structure was modeled, and seismic fragility analysis based on the incremental dynamic analysis was performed, in which seismic fragility curves were obtained according to the probabilistic demand analysis model. The results indicated a high coincidence in hysteretic curves between the ABAQUS model and the OpenSees phenomenological model, which showed favorable self-centering and energy dissipation performance of the joint proposed in this paper. Based on FEMA 356, three kinds of performance points were defined, i.e., "Immediate Occupancy" (IO), "Life Safety" (LS), and "Collapse Prevention" (CP). The prefabricated self-centering frame in this paper tended to exceed the IO, where the stiffness and strength of the structure was susceptible to damage. However, the failure probability at the LS performance level remained low, with only 5% and 37% failure probability under moderate and rare earthquakes, respectively. The structure achieved a collapse margin ratio of 4.28, which indicated a high collapse resistance in it.
Keyword ：
Incremental dynamic analysis Incremental dynamic analysis OpenSees OpenSees Phenomenological joint Phenomenological joint Prefabricated self -centering frame Prefabricated self -centering frame Seismic fragility analysis Seismic fragility analysis
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| GB/T 7714 | Yan, Xueyuan , Shi, Shen , Wang, Fengxuan et al. Seismic fragility analysis of prefabricated self-centering frame structure [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 220 . |
| MLA | Yan, Xueyuan et al. "Seismic fragility analysis of prefabricated self-centering frame structure" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 220 (2024) . |
| APA | Yan, Xueyuan , Shi, Shen , Wang, Fengxuan , Mao, Huimin . Seismic fragility analysis of prefabricated self-centering frame structure . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 220 . |
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Cow dung possesses potential agricultural and energy value but is often regarded as waste and underutilized in most cases. This wastage of resources not only poses a challenge to agricultural sustainability but also limits economic development in rural areas. Cow dung contains natural cellulose components like cellulose and lignin that are derived and used to prepare fiber materials. This paper explores a potential value-added application of agricultural waste, i.e., cow dung fibers to reinforce the alkali-activated slag composites (AASC), which are fabricated based on an industrial by-product slag. The raw and alkali treated cow dung fibers were characterized using scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), thermo-gravimetric analysis (TGA) and X-ray diffraction (XRD). The porosity, density, water absorption, strength and drying shrinkage of AASC were tested and used to evaluate the effect of alkali treated fibers on the properties of AASC. The results showed that subjecting cow dung fibers to alkali treatment improved their surface roughness and thermal stability. The addition of cow dung fibers led to an augmentation in the splitting tensile strength of AASC, primarily due to the bridging action of these fibers. In particular, the 28-day splitting tensile strength of AASC containing 1 wt% of untreated cow dung fibers increased by 17.1% over the reference sample, and this increase was more pronounced in the alkali treated fiber sample. Moreover, the alkali treatment effectively reduced the effects of loss of compressive strength and increased drying shrinkage caused by fiber incorporation. The findings of this paper are helpful to solve the management problems of cow dung waste, reduce the environmental burden and realize the value utilization of resources.
Keyword ：
Alkali-activated slag composites Alkali-activated slag composites Cow dung fibers Cow dung fibers Microstructure Microstructure Strength Strength Treatment Treatment
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| GB/T 7714 | Yang, Zhengxian , Li, Kang , Yan, Xueyuan et al. Characterization and value-added applications of natural cellulose fibers derived from cow dung in cementitious composites [J]. | CELLULOSE , 2024 , 31 (9) : 5575-5589 . |
| MLA | Yang, Zhengxian et al. "Characterization and value-added applications of natural cellulose fibers derived from cow dung in cementitious composites" . | CELLULOSE 31 . 9 (2024) : 5575-5589 . |
| APA | Yang, Zhengxian , Li, Kang , Yan, Xueyuan , Wu, Wenda , Briseghella, Bruno , Marano, Giuseppe Carlo . Characterization and value-added applications of natural cellulose fibers derived from cow dung in cementitious composites . | CELLULOSE , 2024 , 31 (9) , 5575-5589 . |
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Combining the characteristics of concrete-filled double-skin steel tube (CFDST), this paper devised a joint construction form featuring low-beam with haunch partially penetrating into the inner layer of steel tube, thus proposing the joint between unequal-depth steel beam with haunch and CFDST column. This paper conducted finite element analysis of this novel joint under low-cycle reversed loading using ABAQUS software. By taking beam height ratio, axial compression ratio, beam-column width ratio, beam flange width-thickness ratio, and beam web height-width ratios as analysis parameters, the seismic performance of the joint was systematically studied. The results indicated that beam height ratio, axial compression ratio, beam-column width ratio, and beam flange width-thickness ratio have a significant impact on the seismic performance of the joint, while the beam web height -width ratios has a minor effect. Furthermore, through the analysis of the force mechanism and internal force derivation of the core area of the joint between unequal-depth steel beam with haunch and CFDST column, a shear bearing capacity calculation method applicable to such connections was established. This calculation method aligns well with the numerical analysis results and can accurately assess the shear bearing capacity of the core area of this type of joints.
Keyword ：
Finite element analysis Finite element analysis Force analysis Force analysis Seismic performance Seismic performance Shear bearing capacity Shear bearing capacity The joint between unequal-depth steel beam The joint between unequal-depth steel beam with haunch and CFDST column with haunch and CFDST column
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| GB/T 7714 | Yan, Xueyuan , Li, Anlong , Liu, Xuhong et al. Seismic performance of the joint between unequal-depth steel beam and CFDST column [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 225 . |
| MLA | Yan, Xueyuan et al. "Seismic performance of the joint between unequal-depth steel beam and CFDST column" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 225 (2024) . |
| APA | Yan, Xueyuan , Li, Anlong , Liu, Xuhong , Wei, Xiaoying , Mao, Huimin . Seismic performance of the joint between unequal-depth steel beam and CFDST column . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 225 . |
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