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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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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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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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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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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. © 2023
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, X. , Shi, S. , Wang, F. et al. Seismic fragility analysis of prefabricated self-centering frame structure [J]. | Journal of Constructional Steel Research , 2024 , 220 . |
| MLA | Yan, X. et al. "Seismic fragility analysis of prefabricated self-centering frame structure" . | Journal of Constructional Steel Research 220 (2024) . |
| APA | Yan, X. , Shi, S. , Wang, F. , Mao, H. . Seismic fragility analysis of prefabricated self-centering frame structure . | Journal of Constructional Steel Research , 2024 , 220 . |
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以日本NEC办公大楼的结构方案为例，采用SAP2000建立巨型框架抗震结构和巨型框架三维隔震结构的分析模型，对结构施加脉动风荷载，分析子框架调谐比和隔震层阻尼比对巨型框架三维隔震结构减振效果的影响规律，进而完成参数优化，最后对两种结构的位移和加速度进行风振响应分析。研究结果表明：子框架调谐比和隔震层阻尼比分别设置为0.53和0.3时，可使巨型框架三维隔震结构减振效果达到最佳；在脉动风荷载作用下，三维隔震支座的设置能够同时对主、子框架的风振响应实现有效控制。
Keyword ：
三维隔震 三维隔震 参数优化 参数优化 巨型框架结构 巨型框架结构 风振响应 风振响应
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| GB/T 7714 | 颜学渊 , 杨永泰 , 刘旭宏 et al. 巨型框架三维隔震结构风振响应分析 [J]. | 洛阳理工学院学报(自然科学版) , 2024 , 34 (02) : 26-31,78 . |
| MLA | 颜学渊 et al. "巨型框架三维隔震结构风振响应分析" . | 洛阳理工学院学报(自然科学版) 34 . 02 (2024) : 26-31,78 . |
| APA | 颜学渊 , 杨永泰 , 刘旭宏 , 毛会敏 . 巨型框架三维隔震结构风振响应分析 . | 洛阳理工学院学报(自然科学版) , 2024 , 34 (02) , 26-31,78 . |
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Alkali-activated slag (AAS) presents a promising alternative to ordinary Portland cement due to its cost effectiveness, environmental friendliness, and satisfactory durability characteristics. In this paper, cow dung waste was recycled as a renewable natural cellulose fiber, modified with alkali, and then added to AAS mortar. The physico-chemical characteristics of raw and modified cow dung fibers were determined through Fourier transform infrared (FTIR), X-ray diffraction (XRD), and Scanning electron microscope (SEM). Investigations were conducted on the dispersion of cow dung fibers in the AAS matrix, as well as the flowability, strength, and autogenous shrinkage of AAS mortar with varying cow dung fiber contents. The results indicated that modified fiber has higher crystallinity and surface roughness. The ultrasonic method showed superior effectiveness compared to pre-mixing and after-mixing methods. Compared with raw cow dung fibers, modified fibers led to an increase of 11.3% and 36.3% of the 28 d flexural strength and compressive strength of the AAS mortar, respectively. The modified cow dung fibers had a more significant inhibition on autogenous shrinkage, and the addition of 2 wt% cow dung fibers reduced the 7 d autogenous shrinkage of the AAS paste by 52.8% due to the "internal curing effect." This study provides an alternative value-added recycling option for cow dung fibers as a potential environmentally friendly and sustainable reinforcing raw material for cementitious materials, which can be used to develop low autogenous shrinkage green composites.
Keyword ：
alkali-activated slag alkali-activated slag alkali treatment alkali treatment autogenous shrinkage autogenous shrinkage cow dung fibers cow dung fibers ultrasonication ultrasonication
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| GB/T 7714 | Li, Kang , Yang, Zhengxian , Yan, Xueyuan et al. Effect of Modified Cow Dung Fibers on Strength and Autogenous Shrinkage of Alkali-Activated Slag Mortar [J]. | MATERIALS , 2023 , 16 (20) . |
| MLA | Li, Kang et al. "Effect of Modified Cow Dung Fibers on Strength and Autogenous Shrinkage of Alkali-Activated Slag Mortar" . | MATERIALS 16 . 20 (2023) . |
| APA | Li, Kang , Yang, Zhengxian , Yan, Xueyuan , Xu, Liying , Briseghella, Bruno , Marano, Giuseppe Carlo . Effect of Modified Cow Dung Fibers on Strength and Autogenous Shrinkage of Alkali-Activated Slag Mortar . | MATERIALS , 2023 , 16 (20) . |
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A building may be subjected to a variety of accidental loads during its service life. Partially precast concrete (PC) beams are a primary structural component. Their impact resistance can have a substantial impact on the overall safety of a structure when it is subjected to an impact load. In this study, numerical analyses were performed on the dynamic response of PC beams strengthened with bonded steel plates subjected to impact loading. The model was verified from four aspects: energy conversion, failure form, impact force-time history curve, and midspan displacement-time history curve. The dynamic response eigenvalues of the peak impact force, peak midspan displacement, and residual midspan displacement were compared between the numerical simulations and experimental tests. The relative inaccuracy of the peak impact force ranged from 9.51% to 14.0%, with an average value of 11.9%. The average relative error for the midspan displacement was -0.09%, with the greatest relative errors varying between -0.64% and 0.3%. The residual value errors of the midspan displacement ranged from -0.95% to 2.38%, with an average relative error of 0.94%. On this basis, the effects of the impact mass, impact height, width, and length of the bonded steel plate on the impact resistance of the components were evaluated. Furthermore, the differences in the equivalent plastic strain contours, impact force-time history curves, and midspan displacement-time history curves under different parameters were compared. The results demonstrated that the failure modes and flexural deformations of the test beams were influenced by the impact mass and impact height. The increase in the length and width of the steel plate had no effect on the impact force response, but the peak and residual values of the midspan displacement decreased, which could significantly increase the impact resistance of the beams. Lastly, the impact mass m, the impact height h, the thickness t of the bonded steel plate, the length of the bonded steel plate h(s), and the width of the bonded steel plate b(s) were all taken into account in the fitting formula. These five parameters were used to predict the peak impact force response, the peak value of the midspan displacement, and the residual value of the midspan displacement. The results demonstrated that the fitting formula had small errors and could accurately reflect the dynamic responses of the PC beams strengthened with bonded steel plates under impact loading.
Keyword ：
bonded steel plate bonded steel plate impact resistance impact resistance numerical analyses numerical analyses partially precast concrete beam partially precast concrete beam
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| GB/T 7714 | Yan, Xueyuan , Lin, Cihang , Liu, Xuhong et al. Numerical and Analytical Investigations of the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates [J]. | BUILDINGS , 2023 , 13 (3) . |
| MLA | Yan, Xueyuan et al. "Numerical and Analytical Investigations of the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates" . | BUILDINGS 13 . 3 (2023) . |
| APA | Yan, Xueyuan , Lin, Cihang , Liu, Xuhong , Zheng, Tianxiao , Shi, Shen , Mao, Huimin . Numerical and Analytical Investigations of the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates . | BUILDINGS , 2023 , 13 (3) . |
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In order to enhance concrete's impact resistance, this study investigates the effects of single basalt fiber and basalt-polyethylene hybrid fiber on concrete through split Hopkinson pressure bar (SHPB) tests, emphasizing their significance in engineering applications. A comparative analysis of the failure modes, dynamic compressive strength, dynamic compressive toughness, and dynamic growth factor of specimens was conducted under different strain rates and polyethylene fiber volume fractions. The study considered concrete damage, strain rate effect, and the toughening effect of fibers, introducing the damage factor, and establishing a dynamic damage constitutive model for fiber-reinforced concrete. The results showed that basalt-polyethylene fiber reinforced concrete (BPFRC) exhibited better impact resistance and deformation capability. There were improvements observed in dynamic compressive strength, dynamic compressive toughness, and dynamic growth factor. The addition of basalt fiber (BF) and polyethylene fiber (PE) played a buffering role in inhibiting crack propagation and slowing down the damage process. The optimum PE volume fraction for dynamic compressive strength was 0.1% at a strain rate of 60 s-1, 0.15% at a strain rate of 95 s- 1, and 0.05% at a strain rate of 120 s- 1, all with a BF volume fraction of 0.25%. The optimum fiber volume fractions for dynamic compressive toughness and dynamic peak toughness were consistent, both at 0.25% BF and 0.1% PE. The established dynamic damage constitutive model for fiber-reinforced concrete can effectively describe the impact resistance performance of BPFRC, and the experimental curves fit well with the constitutive curves. Furthermore, it was observed that BF acted as macrofibers, bridging to restrain the post-hardening cracking of concrete, while PE acted as microfibers, inhibiting the propagation of plastic cracks, reducing internal defects in concrete, and enhancing the ductility and toughness of concrete. Consequently, BPFRC holds significant potential value in engineering applications.
Keyword ：
Basalt-polyethylene fiber reinforced concrete Basalt-polyethylene fiber reinforced concrete Damage constitutive model Damage constitutive model Dynamic compressive strength Dynamic compressive strength Impact resistance Impact resistance Split Hopkinson pressure bar Split Hopkinson pressure bar
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| GB/T 7714 | Yan, Xueyuan , Wang, Fengxuan , Luo, Yihui et al. Mechanical performance study of basalt-polyethylene fiber reinforced concrete under dynamic compressive loading [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 409 . |
| MLA | Yan, Xueyuan et al. "Mechanical performance study of basalt-polyethylene fiber reinforced concrete under dynamic compressive loading" . | CONSTRUCTION AND BUILDING MATERIALS 409 (2023) . |
| APA | Yan, Xueyuan , Wang, Fengxuan , Luo, Yihui , Liu, Xuhong , Yang, Zhengxian , Mao, Huimin . Mechanical performance study of basalt-polyethylene fiber reinforced concrete under dynamic compressive loading . | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 409 . |
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