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学者姓名：邱灿星
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Abstract ：
Owing to high fatigue life, the iron-based shape memory alloy (FeSMA) buckling-restrained braces (BRBs) are emerging as a promising candidate against long-duration earthquakes. However, the corresponding analysis cannot be found. Current emphasis is paid on unveiling the seismic response differences between concentrically braced frames (CBFs) with FeSMA and steel BRBs when they are attacked by long-duration earthquakes. To directly assess the effect of earthquake duration, this paper selects a total of 90 pairs of short- and long-duration earthquake records, which are record-to-record spectrally equivalent over a wide range of fundamental periods, for nonlinear time history analysis. A benchmark six-story CBF is selected for demonstration purposes. In the numerical simulation process, the fatigue-induced damage is particularly considered. A preliminary examination is first conducted in the case study, in which a representative pair of short- and long-duration records is selected. In what followed, the statistical results from the ground motion suites are analyzed. This work not only highlights the higher failure risk of steel BRBs than FeSMA BRBs under long-duration earthquakes associated with maximum considered earthquake hazard level, but also confirms the advantages of FeSMA BRBs over steel BRBs in controlling residual deformations.
Keyword ：
iron-based shape memory alloy iron-based shape memory alloy Earthquake duration Earthquake duration fatigue fatigue buckling-restrained brace buckling-restrained brace concentrically braced frame concentrically braced frame
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| GB/T 7714 | Qiu, Canxing , Zhang, Aifang , Du, Xiuli . Comparative Analysis of Concentrically Braced Frames with FeSMA and Steel BRBs Under Long-Duration Earthquakes [J]. | JOURNAL OF EARTHQUAKE ENGINEERING , 2024 , 28 (13) : 3860-3884 . |
| MLA | Qiu, Canxing 等. "Comparative Analysis of Concentrically Braced Frames with FeSMA and Steel BRBs Under Long-Duration Earthquakes" . | JOURNAL OF EARTHQUAKE ENGINEERING 28 . 13 (2024) : 3860-3884 . |
| APA | Qiu, Canxing , Zhang, Aifang , Du, Xiuli . Comparative Analysis of Concentrically Braced Frames with FeSMA and Steel BRBs Under Long-Duration Earthquakes . | JOURNAL OF EARTHQUAKE ENGINEERING , 2024 , 28 (13) , 3860-3884 . |
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Abstract ：
Shape-memory alloy (SMA) knee-braced frames (KBFs) are a type of seismically resilient frame buildings. Knee braces (KBs) in this system are the SMA buckling-restrained braces, which provide both self-centering and energy-dissipating capacity. SMAs are known for their noticeable thermal-mechanical property, but there remains a lack of understanding regarding the temperature effect on the seismic responses of SMA KBFs. Hence, this study aims to address this issue at both component and system levels. Cyclic loading tests were conducted on reduced-scale SMA KB specimens under five distinct ambient temperatures ranging from -20 degrees C to 20 degrees C. The experimental data were then used to quantify the relationship between the hysteretic parameters of interest and the ambient temperature. At the system level, a multistory steel frame located in Tangshan City, China, was selected as the example structure. The probability density function was built to describe the temperature variation of the selected region, and the parameters of the function were determined using the maximum likelihood estimation method. The probabilistic analytical framework that considered the temperature effect was described. Then, this work conducted seismic design at the reference temperature (20 degrees C). In what followed, within varying temperature conditions, nonlinear time-history analysis and multistripe analysis were conducted. The seismic response indexes under discrete temperature levels were compared. Finally, the temperature effect was understood by generating the joint fragility curves under various levels of temperature and seismic intensity. The findings indicated that the temperature effect on SMA KBs was noticeable. However, the temperature effect on SMA KBFs was minor, even though the extent of temperature variation was up to 60 degrees C.
Keyword ：
Seismic fragility Seismic fragility Temperature effect Temperature effect Knee-braced frame (KBF) Knee-braced frame (KBF) Shape-memory alloy Shape-memory alloy
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| GB/T 7714 | Jiang, Tianyuan , Qiu, Canxing , Liu, Jiawang . Temperature Effect on Seismic Responses of SMA Knee-Braced Frames [J]. | JOURNAL OF STRUCTURAL ENGINEERING , 2024 , 150 (10) . |
| MLA | Jiang, Tianyuan 等. "Temperature Effect on Seismic Responses of SMA Knee-Braced Frames" . | JOURNAL OF STRUCTURAL ENGINEERING 150 . 10 (2024) . |
| APA | Jiang, Tianyuan , Qiu, Canxing , Liu, Jiawang . Temperature Effect on Seismic Responses of SMA Knee-Braced Frames . | JOURNAL OF STRUCTURAL ENGINEERING , 2024 , 150 (10) . |
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Abstract ：
Owing to superelastic behavior, shape memory alloy (SMA) has been widely utilized to develop self-centering damping devices. Recently, the authors developed a novel SMA damper, i.e. the SMA slip friction (SMASF) damper. The cyclic behavior of the SMASF damper not only depends on the hysteresis shape factors of SMA bars, but also on the coefficient of kinetic friction and the slope of the friction plates. Hence, the basic working mechanism of the SMASF damper is different from that of conventional SMA dampers. In the early work, the features of the SMASF damper have been revealed by static cyclic loading tests. However, the seismic displacement responses of this novel damper remain unknown. To this end, this paper initiates with a brief introduction of the damper, including the configuration, working mechanism, and testing results. And then, extensive seismic analyses based on single-degree-of-freedom systems were conducted. Based on the constant-strength ductility demand spectra, the displacement responses of the SMASF damper were understood through the comparisons with conventional SMA damper and friction damper. A wide range of fundamental periods, strength capacities and seismic intensity levels were considered. Further, parametric analysis was conducted to assess the effect of the hysteresis shape factors of SMA bars and the coefficient of kinetic friction and the slope of the friction plates. This study also sheds light on the force-based seismic design method for this damper.
Keyword ：
displacement displacement single-degree-of-freedom single-degree-of-freedom numerical analysis numerical analysis shape memory alloy shape memory alloy
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| GB/T 7714 | Qiu, Canxing , Bai, Muyuan , Jiang, Tianyuan . Seismic displacement response of SDOF systems with SMA slip friction dampers [J]. | SMART MATERIALS AND STRUCTURES , 2024 , 33 (1) . |
| MLA | Qiu, Canxing 等. "Seismic displacement response of SDOF systems with SMA slip friction dampers" . | SMART MATERIALS AND STRUCTURES 33 . 1 (2024) . |
| APA | Qiu, Canxing , Bai, Muyuan , Jiang, Tianyuan . Seismic displacement response of SDOF systems with SMA slip friction dampers . | SMART MATERIALS AND STRUCTURES , 2024 , 33 (1) . |
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Abstract ：
Partially self-centering structures are promising seismic resilient structural systems by reducing residual interstory drifts with low initial construction costs. Comprehensive studies focused on structural design and performance evaluation, but no research was conducted to investigate the design of nonstructural components in partially self-centering structures. This research focuses on developing the probabilistic spectral acceleration demands for the nonstructural design in partial self-centering structures. 320 near-fault recorded ground motions were adopted for considering the uncertainties of seismic excitations. The spectral accelerations of the light nonstructural component were obtained through comprehensive dynamic analyses. The logarithmic normal distribution can be used for describing the probabilistic distribution of floor spectra for partially self-centering structures under earthquakes, validating through the Anderson-Darling test. The influences of design parameters (including structural period, hysteretic parameters, structural damping, the ratio of the structural period to the nonstructural period, and nonstructural damping) on the probabilistic distribution of floor spectra were investigated through parametric dynamic analysis results. Artificial neural network (ANN) models were developed for predicting the probabilistic floor spectra for partially self-centering structures. The analysis results indicate that ANN models can achieve excellent accuracy with a coefficient of determination larger than 0.99. Comparative analysis results reveal that the ASCE method may underestimate the acceleration demand of light secondary systems supported by partially self-centering structures. The developed ANN models were interpreted using the shapely additive explanations. It has been found that the fundamental periods of the main structure and nonstructural components and the response modification factor show significant effects on the median and deviation of the probabilistic floor spectra for partially self-centering structures. The software FloorSpecPS was established to predict the probabilistic floor spectra for partially self-centering structures using the developed ANN models in practical application.
Keyword ：
Nonstructural components Nonstructural components Artificial neural network Artificial neural network Spectral acceleration demands Spectral acceleration demands Partially self-centering Partially self-centering Probabilistic floor spectra Probabilistic floor spectra
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| GB/T 7714 | Hu, Shuling , Qu, Bing , Qiu, Canxing et al. Probabilistic evaluation of spectral acceleration demands on light secondary systems supported by partially self-centering structures [J]. | ENGINEERING STRUCTURES , 2024 , 315 . |
| MLA | Hu, Shuling et al. "Probabilistic evaluation of spectral acceleration demands on light secondary systems supported by partially self-centering structures" . | ENGINEERING STRUCTURES 315 (2024) . |
| APA | Hu, Shuling , Qu, Bing , Qiu, Canxing , Zhang, Ruibin . Probabilistic evaluation of spectral acceleration demands on light secondary systems supported by partially self-centering structures . | ENGINEERING STRUCTURES , 2024 , 315 . |
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Abstract ：
本实用新型公开了装配式金属弯曲屈服阻尼器，包括：X型钢板、钢垫块、连接螺母和连接螺杆四部分。钢垫块与X型钢板交替布置，二者通过预紧的螺杆装配成整体钢垫块开竖向螺栓孔，以便阻尼器与结构栓接。该阻尼器在水平向地震作用下，上下两端产生相对位移，X型钢板发生弯曲变形，为结构提供刚度和阻尼。与常见的金属弯曲阻尼器相比，本实用新型无需焊接工艺，避免了焊接过程产生的残余应力、工艺差异和焊接部位易发生断裂等不利因素，因而提高了阻尼器力学性能的稳定性；并且，若震后需更换X型钢板，本实用新型采用的装配式连接方式可有效地提高更换效率。
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| GB/T 7714 | 邱灿星 , 黄天艺 , 张爱芳 et al. 装配式金属弯曲屈服阻尼器 : CN202320093876.X[P]. | 2023-01-31 . |
| MLA | 邱灿星 et al. "装配式金属弯曲屈服阻尼器" : CN202320093876.X. | 2023-01-31 . |
| APA | 邱灿星 , 黄天艺 , 张爱芳 , 杜修力 . 装配式金属弯曲屈服阻尼器 : CN202320093876.X. | 2023-01-31 . |
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Abstract ：
本实用新型公开了双阶屈服金属弯曲阻尼器，包括上层钢板、下层钢板、带滑槽连接板、X型钢板、三角形钢板、滑动轴、连接螺钉、螺钉垫片。多块三角形钢板顶部置入上层钢板开槽当中，并与上层钢板焊接连接；三角形钢板下部预先开槽，并置入滑动轴，滑动轴两侧分别置入两块连接板中，两块连接板焊接在下层钢板上；在小震作用下阻尼器上下相对位移小，外侧两块X型钢板首先受弯进入屈服状态耗能，而中间三角形钢板在小震作用下处于弹性状态，未进入屈服阶段；在阻尼器受到大震作用时，上下两层钢板相对位移增大，三角形钢板也进入受弯屈服状态，两种钢板共同耗能。通过控制两种钢板的相关参数，本发明可起到在大震小震分别作用下分阶耗能的效果。
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| GB/T 7714 | 邱灿星 , 黄天艺 , 张爱芳 et al. 双阶屈服金属弯曲阻尼器 : CN202320093875.5[P]. | 2023-01-31 . |
| MLA | 邱灿星 et al. "双阶屈服金属弯曲阻尼器" : CN202320093875.5. | 2023-01-31 . |
| APA | 邱灿星 , 黄天艺 , 张爱芳 , 杜修力 . 双阶屈服金属弯曲阻尼器 : CN202320093875.5. | 2023-01-31 . |
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Abstract ：
Although the potential of shape memory alloys (SMAs) in seismic applications has been well recognized, the majority of the past research was directed to NiTi SMAs. This study aims to investigate the feasibility of using a novel type of SMA, termed superelastic monocrystalline CuAlBe SMA, in seismic vibration control. According to prior loading tests, CuAlBe SMAs had an excellent superelasticity behavior with the largest recoverable strain over 25%. Within the superelastic range, CuAlBe SMAs shown unloading behavior which was dependent on the strain amplitude in the present cycle, which could not be captured by current constitutive models. Hence, a new constitutive model was firstly proposed to simulate the hysteretic behavior of CuAlBe SMAs, and a good agreement is found between the experimental data and numerical simulations. And then, to explore the characteristics and advantages in terms of seismic applications, case studies on single-degree-of-freedom (SDOF) systems with NiTi and CuAlBe SMAs were carried out. Finally, two design methods were used to size the NiTi and CuAlBe SMAs, and the corresponding SDOF systems were subjected to two ensembles of earthquakes associated with frequently occurred and design basis seismic hazard levels. The simulation results indicated that, compared with NiTi SMAs, CuAlBe SMAs could more effectively control the displacement and acceleration demands, if their ductility capacity was fully utilized in the design procedure.
Keyword ：
CuAlBe CuAlBe constitutive model constitutive model seismic design seismic design seismic applications seismic applications SMA SMA
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| GB/T 7714 | Qiu, Canxing , Tang, Yuqing , Liu, Hang et al. Seismic response analysis of single-degree-of-freedom systems with superelastic monocrystalline CuAlBe SMAs [J]. | SMART MATERIALS AND STRUCTURES , 2023 , 32 (11) . |
| MLA | Qiu, Canxing et al. "Seismic response analysis of single-degree-of-freedom systems with superelastic monocrystalline CuAlBe SMAs" . | SMART MATERIALS AND STRUCTURES 32 . 11 (2023) . |
| APA | Qiu, Canxing , Tang, Yuqing , Liu, Hang , Du, Xiuli . Seismic response analysis of single-degree-of-freedom systems with superelastic monocrystalline CuAlBe SMAs . | SMART MATERIALS AND STRUCTURES , 2023 , 32 (11) . |
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Abstract ：
以形状记忆合金(SMA)滑动摩擦阻尼器(shape memory alloy slip friction damper,SMASFD)为基础,提出了一种自复位摇摆柱.在该自复位摇摆柱中,柱身为H型钢,SMASFD位于柱底强轴的两侧呈对称布置,为摇摆柱提供自复位能力和消能能力.推导了摇摆柱的滞回模型理论公式,并在ABAQUS中建立了精细化有限元模型.理论公式与数值模拟均分析了摇摆柱在往复荷载下的滞回行为,二者的结果吻合良好,并且均表明该摇摆柱具有"旗帜形"的滞回曲线;摇摆柱的滞回行为由SMASFD的力学性能和柱身的轴压比控制.研究结果表明:提高SMASFD的承载力可以有效提高摇摆柱的受弯承载力;增大SMASFD的刚度可以同时提高摇摆柱的屈服前刚度和屈服后刚度;在满足稳定性的前提下,增大轴压比会提高摇摆柱的消压弯矩和强度,但是由P-Δ效应所产生的负刚度随之增加,同时增大了柱底的塑性应变.此外,由数值模拟结果还发现,挡板可防止SMASFD夹板在变形过程中滑出,从而避免SMA螺栓受弯.
Keyword ：
形状记忆合金 形状记忆合金 滞回行为 滞回行为 自复位 自复位 数值模拟 数值模拟 摇摆柱 摇摆柱
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| GB/T 7714 | 刘家旺 , 邱灿星 , 杜修力 . 设置SMA滑动摩擦阻尼器的自复位摇摆柱滞回行为理论分析与数值模拟 [J]. | 建筑结构学报 , 2023 , 44 (3) : 39-48 . |
| MLA | 刘家旺 et al. "设置SMA滑动摩擦阻尼器的自复位摇摆柱滞回行为理论分析与数值模拟" . | 建筑结构学报 44 . 3 (2023) : 39-48 . |
| APA | 刘家旺 , 邱灿星 , 杜修力 . 设置SMA滑动摩擦阻尼器的自复位摇摆柱滞回行为理论分析与数值模拟 . | 建筑结构学报 , 2023 , 44 (3) , 39-48 . |
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Abstract ：
与传统隔震支座相比，形状记忆合金(shape memory alloys, SMA)隔震支座能够提升结构的自复位和耗能能力。然而过早介入的SMA可能会增加中、小震时上部结构的内力和加速度响应。为解决这一问题，在SMA隔震支座中引入间隙形成间隙式SMA隔震支座，以满足不同设防目标的隔震需求。首先，提出了间隙式SMA支座的物理构造形式，并开展了SMA丝循环拉伸试验；随后，以两自由度的框架结构简化模型为例，探讨间隙长度以及SMA屈服力对隔震效果的影响；最后，旨在降低大震、巨震下间隙式SMA隔震支座的内力与加速度响应，进一步引入负刚度机制改进间隙式SMA隔震体系，并探究了负刚度-间隙式SMA支座隔震的可行性。计算结果显示，间隙式SMA隔震支座可以有效降低中震、小震时上部结构的内力与加速度响应；上部结构加速度响应与间隙长度负相关，与SMA屈服力正相关；下部结构位移响应与间隙长度正相关，与SMA屈服力负相关。引入负刚度后，间隙式SMA支座可在有效控制大震或巨震下支座位移响应的同时，显著减小上部结构内力与加速度响应。
Keyword ：
形状记忆合金(SMA) 形状记忆合金(SMA) 隔震支座 隔震支座 减震性能 减震性能 摩擦摆系统 摩擦摆系统 负刚度 负刚度
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| GB/T 7714 | 邱灿星 , 吴诚静 , 杜修力 et al. 间隙式SMA隔震支座性能分析及负刚度改进研究 [J]. | 振动与冲击 , 2023 , 42 (09) : 19-26 . |
| MLA | 邱灿星 et al. "间隙式SMA隔震支座性能分析及负刚度改进研究" . | 振动与冲击 42 . 09 (2023) : 19-26 . |
| APA | 邱灿星 , 吴诚静 , 杜修力 , 王萌 . 间隙式SMA隔震支座性能分析及负刚度改进研究 . | 振动与冲击 , 2023 , 42 (09) , 19-26 . |
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Abstract ：
This paper proposes an assembled X-shaped flexural steel damper. Welding is waived for the novel damper. As the kernel element of the damper, the X-shaped flexural steel plates have the advantages of ease of installation and replacement if necessary. In the analytical part, the effective height of the flexural steel plate was suggested, and then, the yield displacement, yield load and initial stiffness of the damper were derived. The proof-of-concept cyclic loading test was conducted using one reduced-scale specimen within a four-bar linkage experimental setup. The hysteretic performance indexes, including strength, stiffness and energy dissipation, were quantified. The high-fidelity finite element (FE) models were established by ABAQUS. The parametric study was further conducted based on the verified FE model. The considered parameters were the height and thickness of the steel plates. The testing results indicate that the proposed damper has plump hysteretic curve with good energy dissipation capacity and excellent ductility, although slight slip behavior can be found due to the gap caused by the assembling process. The results obtained from analytical method and numerical model are in good agreement with the experimental data. The results of parametric analysis show that the numerical results well agree with analytical predictions, indicating the numerical model can reflect the mechanical behavior of AXSFD. A benchmark frame building was selected to demonstrate the seismic control efficacy of the damper. The nonlinear time history analysis results indicate that the damper reduced both peak and residual interstory drift ratios for the protected structure.
Keyword ：
cyclic loading test cyclic loading test seismic performance evaluation seismic performance evaluation metallic flexural damper metallic flexural damper prefabrication prefabrication numerical analysis numerical analysis
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| GB/T 7714 | Qiu, Canxing , Huang, Tianyi , Liu, Jiawang . Cyclic loading tests and numerical simulations of an assembled X-shaped flexural steel damper [J]. | ADVANCES IN STRUCTURAL ENGINEERING , 2023 , 27 (2) : 301-313 . |
| MLA | Qiu, Canxing et al. "Cyclic loading tests and numerical simulations of an assembled X-shaped flexural steel damper" . | ADVANCES IN STRUCTURAL ENGINEERING 27 . 2 (2023) : 301-313 . |
| APA | Qiu, Canxing , Huang, Tianyi , Liu, Jiawang . Cyclic loading tests and numerical simulations of an assembled X-shaped flexural steel damper . | ADVANCES IN STRUCTURAL ENGINEERING , 2023 , 27 (2) , 301-313 . |
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