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学者姓名：邱灿星
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摘要 ：
This paper proposes a new type of self-centering (SC) damper which exploits the shape memory alloy (SMA) bolts and variable friction mechanism, termed the SMA slip friction damper (SMASFD). The theoretical equations governing the force-displacement relationship, the equivalent stiffness and the equivalent viscous damping are first derived. Then, the application potential of such damper is briefly discussed. In the experimental study, the results of the experimental validations of the SMA bolts and the friction mechanism are presented, followed by the results of proof-of-concept test on the fabricated SMASFDs. According to the testing results, the damper exhibited a symmetric tension-compression flag-shaped hysteresis characterized by excellent SC capacity and good damping capability. The prestrain treatment was applied to the SMA bolts in one test, which was found effectively increased the initial stiffness of the damper. To provide a further understanding on the damper and examine the stress and strain demands of the components, high-fidelity finite element models were established for numerical simulations. Both the analytical method and numerical simulation were validated by the experimental data.
关键词 ：
Damper Damper Experimental study Experimental study Self-centering Self-centering SMA SMA Variable friction Variable friction
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| GB/T 7714 | Qiu, Canxing , Liu, Jiawang , Du, Xiuli . Cyclic behavior of SMA slip friction damper [J]. | ENGINEERING STRUCTURES , 2022 , 250 . |
| MLA | Qiu, Canxing 等. "Cyclic behavior of SMA slip friction damper" . | ENGINEERING STRUCTURES 250 (2022) . |
| APA | Qiu, Canxing , Liu, Jiawang , Du, Xiuli . Cyclic behavior of SMA slip friction damper . | ENGINEERING STRUCTURES , 2022 , 250 . |
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摘要 ：
包含可更换耗能钢板的自复位支撑参数分析
关键词 ：
数值模拟 数值模拟 耗能 耗能 残余变形 残余变形 自复位 自复位 滞回性能 滞回性能 参数分析 参数分析
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| GB/T 7714 | 刘家旺 , 邱灿星 , 杜修力 et al. 包含可更换耗能钢板的自复位支撑参数分析 [J]. | 刘家旺 , 2021 , 47 (4) : 374-382 . |
| MLA | 刘家旺 et al. "包含可更换耗能钢板的自复位支撑参数分析" . | 刘家旺 47 . 4 (2021) : 374-382 . |
| APA | 刘家旺 , 邱灿星 , 杜修力 , 北京工业大学学报 . 包含可更换耗能钢板的自复位支撑参数分析 . | 刘家旺 , 2021 , 47 (4) , 374-382 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
To mitigate the adverse structural responses, an improved version of the traditional tuned vibration absorber has been proposed based on the shape memory alloy spring, referred as the shape memory alloy-spring tuned vibration absorber. The finite element numerical models of the multi-degree-of-freedom structure (e.g., transmission tower) and shape memory alloy-spring tuned vibration absorber are developed by using the commercial software ANSYS, and the nonlinear behavior of the shape memory alloy spring is validated based on a previous experimental study. The damping mechanism of the shape memory alloy-spring tuned vibration absorber attached to a multi-degree-of-freedom structure under seismic excitations is investigated, and the nonlinear hysteretic behavior of the shape memory alloy spring is also discussed. The results show that the proposed damper has a two-stage damping mechanism, and its control performance is remarkable. Because the coupled system response is sensitive to the amplitude level, the optimal configuration of the shape memory alloy-spring tuned vibration absorber can be obtained by parametric analysis. Particularly, because of the nonlinear target energy transfer and transient resonance capture mechanism, the shape memory alloy-spring tuned vibration absorber exhibits stable control ability under different seismic waves, indicating a good stability in vibration control of a multi-degree-of-freedom system.
关键词 ：
damping mechanism damping mechanism hysteretic behavior hysteretic behavior seismic excitation seismic excitation Shape memory alloy spring Shape memory alloy spring transmission tower transmission tower tuned vibration absorber tuned vibration absorber
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| GB/T 7714 | Lu, Zheng , Rong, Kunjie , Tian, Li et al. Studies on the damping mechanism of shape memory alloy-spring tuned vibration absorber attached to a multi-degree-of-freedom structure [J]. | JOURNAL OF VIBRATION AND CONTROL , 2021 . |
| MLA | Lu, Zheng et al. "Studies on the damping mechanism of shape memory alloy-spring tuned vibration absorber attached to a multi-degree-of-freedom structure" . | JOURNAL OF VIBRATION AND CONTROL (2021) . |
| APA | Lu, Zheng , Rong, Kunjie , Tian, Li , Qiu, Canxing , Du, Jiang . Studies on the damping mechanism of shape memory alloy-spring tuned vibration absorber attached to a multi-degree-of-freedom structure . | JOURNAL OF VIBRATION AND CONTROL , 2021 . |
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摘要 ：
Owing to the unique superelasticity and satisfactory energy dissipation capacity, shape memory alloys (SMAs) show great potential in earthquake engineering. This study focused on establishing analytical method and finite element (FE) model for the buckling-restrained SMA (BRSMA) based self-centering (SC) dampers. For the BRSMA-based SC damper, the lateral deformation of the slender SMA component is constrained by the surrounding buckling-restrained plates (BRPs). Hence, the SMA component avoids buckling induced instability and the damper accordingly exhibits stable cyclic behavior under tension-compression loadings. Although the compressive behavior has been obtained through cyclic loading tests, an in-depth understanding on the corresponding force-displacement relationship is required. As such, a simple analytical method was proposed for estimating the compressive strength capacity of the BRSMA-based SC damper. Besides, the FE model was built to provide additional information that was difficult to obtain in physical model tests. The accuracy of the analytical method and FE model was confirmed by the testing results. The verified FE model was further used to conduct the parametric analysis. The parameters of interest included the shape of the reduced section, the dimension of the BRSMA components, the gap between the BRSMA components and BRPs and the number of bolts. The findings of this paper not only promote understanding on the cyclic behavior of this new damper, but also provide suggestions and guidelines for future design.
关键词 ：
analytical method analytical method buckling-restrained mechanism buckling-restrained mechanism FE model FE model self-centering damper self-centering damper SMA SMA
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| GB/T 7714 | Qiu, Canxing , Liu, Jiawang , Du, Xiuli . Analytical and numerical study on the cyclic behavior of buckling-restrained SMA-based self-centering damper [J]. | SMART MATERIALS AND STRUCTURES , 2021 , 30 (9) . |
| MLA | Qiu, Canxing et al. "Analytical and numerical study on the cyclic behavior of buckling-restrained SMA-based self-centering damper" . | SMART MATERIALS AND STRUCTURES 30 . 9 (2021) . |
| APA | Qiu, Canxing , Liu, Jiawang , Du, Xiuli . Analytical and numerical study on the cyclic behavior of buckling-restrained SMA-based self-centering damper . | SMART MATERIALS AND STRUCTURES , 2021 , 30 (9) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种用于提升梁柱节点消能与自复位能力的装置，包括与柱或梁连接的连接钢板、扇形钢板、沙漏形SMA棒、螺栓和螺母。两块连接钢板，其中一块连接钢板开有螺栓孔，通过螺栓连接到柱的内侧面上，两块分别开有三个圆孔的扇形钢板焊接到连接钢板上，另一块连接钢板同样开有螺栓孔，通过螺栓连接到梁的底面，一块开有三个圆孔的扇形钢板焊接到连接钢板上。三根沙漏形SMA棒依次穿过与柱连接的上侧扇形钢板，与梁连接的扇形钢板和与柱连接的下侧扇型钢板，并通过螺母拧紧SMA棒的两端。
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| GB/T 7714 | 邱灿星 , 李承甜 , 刘家旺 et al. 一种用于提升梁柱节点消能与自复位能力的装置 : CN202110026481.3[P]. | 2021-01-08 . |
| MLA | 邱灿星 et al. "一种用于提升梁柱节点消能与自复位能力的装置" : CN202110026481.3. | 2021-01-08 . |
| APA | 邱灿星 , 李承甜 , 刘家旺 , 杜修力 . 一种用于提升梁柱节点消能与自复位能力的装置 : CN202110026481.3. | 2021-01-08 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
This paper focuses on the performance-based seismic design (PBSD) methodology of multi-story concentrically braced frames (CBFs) equipped with a novel brace, i.e., the shape memory alloy (SMA)-friction damping brace (SMAFDB). The fundamental response characteristics of the framing structure are first understood through nonlinear response history analysis on the equivalent single-degree-of-freedom (SDOF) systems. The parameters varied in the SDOF analyses are the period of vibration (T), the strength reduction factor (R), and the normalized friction slip displacement (μf). The seismic response indexes of interest are the peak displacement, the ductility, the residual displacement and the peak acceleration. Relationships are built between the seismic response indexes and parameters of T, R and μf. Then, the SDOF-based results are explored to develop the PBSD methodology, which defines the peak interstory drift, the peak floor acceleration and the residual interstory drift as the performance targets. To demonstrate and validate the proposed design methodology, the six-story prototype CBFs equipped with SMAFDBs are designed and then subjected to ground motions associated with hazard levels of design basis earthquakes (DBE) and maximum considered earthquakes (MCE). The performance evaluation results indicate that the frames can be effectively designed to meet the targeted performance objectives at the DBE level. It also indicates that the frames maintain seismic-resisting capacity at the MCE level. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词 ：
Damping Damping Degrees of freedom (mechanics) Degrees of freedom (mechanics) Earthquakes Earthquakes Friction Friction Seismic design Seismic design Seismic response Seismic response Shape-memory alloy Shape-memory alloy Vibration analysis Vibration analysis
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| GB/T 7714 | Qiu, Canxing , Du, Xiuli . Performance-based seismic design of multi-story CBFs equipped with SMA-friction damping braces [J]. | Bulletin of Earthquake Engineering , 2021 , 19 (6) : 2711-2737 . |
| MLA | Qiu, Canxing et al. "Performance-based seismic design of multi-story CBFs equipped with SMA-friction damping braces" . | Bulletin of Earthquake Engineering 19 . 6 (2021) : 2711-2737 . |
| APA | Qiu, Canxing , Du, Xiuli . Performance-based seismic design of multi-story CBFs equipped with SMA-friction damping braces . | Bulletin of Earthquake Engineering , 2021 , 19 (6) , 2711-2737 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Superelastic shape memory alloys (SMAs) can recover large inelastic deformation meanwhile dissipating energy under loading reversals. This property makes them an attractive alternative for developing structures with desirable self-centering (SC) capability. For SMA braced frames (SMABFs), which have not been codified in current seismic provisions, their deformation demand under earthquakes needs to be estimated with confidence in the phase of seismic design, retrofit or upgrade. In this work, the inelastic displacement ratio, i.e. CR, is explored to address current issue. The fundamental behavior of SMABFs is understood by analyzing the equivalent single-degree-of-freedom (SDOF) systems, with the purpose of evaluating and discussing the influence of fundamental period (T), strength reduction ratio (R) and hysteretic parameters of systems (including the secondary stiffness ratio alpha and the hysteresis width beta) on CR. The regression of CR is further conducted to be a function of T, R, alpha, and beta. Subsequently, a CR-based seismic design procedure is developed for multi-story SMABFs. Two frame structures of 3 and 6 stories are utilized to verify the proposed design procedure. The seismic analysis results indicate that the mean responses of designed structures agree well with prescribed performance targets. Although SMABFs are focused in this study, the proposed method could also shed light on the other types of SC structures.
关键词 ：
Braced frame Braced frame Inelastic displacement ratio Inelastic displacement ratio Seismic design Seismic design Shape memory alloy Shape memory alloy
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| GB/T 7714 | Qiu, Canxing , Du, Xiuli , Teng, Jun et al. Seismic design method for multi-story SMA braced frames based on inelastic displacement ratio [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2021 , 147 . |
| MLA | Qiu, Canxing et al. "Seismic design method for multi-story SMA braced frames based on inelastic displacement ratio" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 147 (2021) . |
| APA | Qiu, Canxing , Du, Xiuli , Teng, Jun , Li, Zuohua , Chen, Cheng . Seismic design method for multi-story SMA braced frames based on inelastic displacement ratio . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2021 , 147 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Superelastic shape memory alloys (SMAs) are capable of recovering large inelastic deformation and dissipating energy under loading reversals, and therefore present promising application in vibration control of engineering structures subjected to dynamic loads. Properties of SMAs are often optimised based on experimental results and treated as deterministic for dynamic analysis of structures with SMA-based devices. This study applies the Metropolis-Hasting algorithm to characterise the uncertainties within an SMA material model and to provide insight into its parameter uncertainty. Cyclic tests of SMA bars are first conducted and the experimental data are analysed using the Markov chain Monte Carlo method. The statistical properties of SMA model parameters are calculated based on posterior parameter distributions. The influence of SMA model parameter uncertainty is further explored on energy dissipation capacity under cyclic tests. The first four L-moment method is applied to transform the posterior parameter distributions into standard normal distribution to further evaluate the influence of model parameter uncertainty on energy dissipation in dynamic analysis.
关键词 ：
cyclic loading cyclic loading first four L-moment method first four L-moment method Markov chain Monte Carlo Markov chain Monte Carlo Metropolis-Hasting algorithm Metropolis-Hasting algorithm shape memory alloys shape memory alloys superelastic effect superelastic effect uncertainty uncertainty
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| GB/T 7714 | Hou, Hetao , Li, Jinpeng , Chen, Cheng et al. Uncertainty analysis of a shape memory alloy model for dynamic analysis [J]. | SMART MATERIALS AND STRUCTURES , 2021 , 30 (2) . |
| MLA | Hou, Hetao et al. "Uncertainty analysis of a shape memory alloy model for dynamic analysis" . | SMART MATERIALS AND STRUCTURES 30 . 2 (2021) . |
| APA | Hou, Hetao , Li, Jinpeng , Chen, Cheng , Qiu, Canxing . Uncertainty analysis of a shape memory alloy model for dynamic analysis . | SMART MATERIALS AND STRUCTURES , 2021 , 30 (2) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Shape memory alloys (SMAs) gained increasing attentions from the perspective of seismic protection, primarily because of their excellent superelasticity, satisfactory damping and high fatigue life. However, the superelastic strain of SMAs has an upper limit, beyond which the material completes the austenite to martensite phase transformation and is followed by noticeable strain hardening. The strain hardening behavior would not only induce high force demand to the protected structures, but also cause unrecoverable deformation. More importantly, the SMAs may fracture if the deformation demand exceeds their capacity under severe earthquakes. In the case of installing SMA braces (SMABs) in the multi-story concentrically braced frames (CBFs), the material failure would lead to the malfunction of SMABs and this further causes building collapse. The friction mechanism could behave as a "fuse" through capping the strength demand at a constant level. Therefore, this paper suggests connecting the SMAB with a friction damper to achieve a novel brace, i.e. the SMA-friction damping brace (SMAFDB). A proof-of-concept test was carried out on a homemade specimen and the test results validated the novel brace behaves in a desirable manner. In addition, to explore the seismic response characteristics of the SMAFDB within structures, a six-story CBF equipped with SMAFDBs was designed and compared against those incorporated with SMABs or friction damping braces (FDBs) at the frequently occurred earthquake (FOE), design basis earthquake (DBE) and maximum considered earthquake (MCE). The comparative results show the SMAFDB is superior to the counterparts. Under the FOE and DBE ground motions, the SMAFDBs successfully eliminated residual deformations as the SMABs do, and achieved identical maximum interstory drift as the FDBs. Under the MCE ground motions, the SMAFDBs not only well addressed the brace failure problem that was possibly encountered in the SMABs, but also better controlled residual deformation than the FDBs.
关键词 ：
Concentrically braced frame Concentrically braced frame fuse fuse residual deformation residual deformation seismic resilience seismic resilience SMA SMA
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| GB/T 7714 | Qiu, Canxing , Liu, Jiawang , Teng, Jun et al. Seismic performance evaluation of multi-story CBFs equipped with SMA-friction damping braces [J]. | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES , 2021 , 32 (15) : 1725-1743 . |
| MLA | Qiu, Canxing et al. "Seismic performance evaluation of multi-story CBFs equipped with SMA-friction damping braces" . | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 32 . 15 (2021) : 1725-1743 . |
| APA | Qiu, Canxing , Liu, Jiawang , Teng, Jun , Li, Zuohua , Du, Xiuli . Seismic performance evaluation of multi-story CBFs equipped with SMA-friction damping braces . | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES , 2021 , 32 (15) , 1725-1743 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
A systematic modeling study is conducted to predict the dynamic response of magnetorheological (MR) damper based on a refined constitutive model for MR fluids. A particle-level simulation method is first employed to probe the microstructured behavior and rheological properties of MR fluids, based on which the refined constitutive model is developed. The constitutive model is further validated by comparing the predicted results with the data obtained from microscopic simulations and existing experiments. It is revealed that the proposed constitutive model has comparable accuracy and good applicability in representing MR fluids. Subsequently, a computational fluid dynamics (CFD) model is established to explore MR damper's behavior by using the proposed constitutive model to describe the fluid rheology. For better capturing the dynamic hysteretic behavior of MR damper, a modified parametric model is developed by combing the Bingham plastic model and the proposed constitutive model. The modified model for MR damper shows its validity and superiority over the existing Bingham plastic models.
关键词 ：
Bingham plastic model Bingham plastic model CFD CFD constitutive model constitutive model MR damper MR damper particle-level simulation particle-level simulation rheological property rheological property
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| GB/T 7714 | Pei, Pei , Peng, Yongbo , Qiu, Canxing . Magnetorheological damper modeling based on a refined constitutive model for MR fluids [J]. | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES , 2021 . |
| MLA | Pei, Pei et al. "Magnetorheological damper modeling based on a refined constitutive model for MR fluids" . | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES (2021) . |
| APA | Pei, Pei , Peng, Yongbo , Qiu, Canxing . Magnetorheological damper modeling based on a refined constitutive model for MR fluids . | JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES , 2021 . |
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