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学者姓名：高向宇
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Abstract ：
In this paper, the shaking table tests and finite element analyses were conducted on the traditional thermal power plant main building and the thermal power plant main building with BRBs, respectively. The differences in torsional resistance between the two structural systems were studied, and the suppression effect on the displacement field distortion of the plane consisting of crane and tracks through adding BRBs in the thermal power plant main building was discussed. The study shows that after adopting a buckling-restrained brace in a thermal power plant main building, the damage and torsional response of the structure under an earthquake can be reduced, the occurrence of inelastic torsion can be effectively blocked, and the translation-torsion coupling effect can be reduced. At the same time, it can reduce the distortion amplitude of the displacement field of the plane consisting of crane and tracks and play a key role in improving the reliability of roof truss, crane, coal bucket, and low-ductility connectors, and it also facilitates the realization of performance-based seismic design.
Keyword ：
Torsion resistance Torsion resistance Buckling-restrained brace Buckling-restrained brace Conventional steel brace Conventional steel brace Thermal power plant main building Thermal power plant main building Inelastic torsion Inelastic torsion Displacement field distortion Displacement field distortion
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| GB/T 7714 | Wang, Zuojie , Gao, Xiangyu , Li, Zhenyu et al. A Comparative Shaking Table Study on Inelastic Torsion and Torsional Performance of Conventional Thermal Power Plant Main Building and Thermal Power Plant Main Building with the Buckling-Restrained Braces [J]. | JOURNAL OF STRUCTURAL ENGINEERING , 2022 , 148 (9) . |
| MLA | Wang, Zuojie et al. "A Comparative Shaking Table Study on Inelastic Torsion and Torsional Performance of Conventional Thermal Power Plant Main Building and Thermal Power Plant Main Building with the Buckling-Restrained Braces" . | JOURNAL OF STRUCTURAL ENGINEERING 148 . 9 (2022) . |
| APA | Wang, Zuojie , Gao, Xiangyu , Li, Zhenyu , Liu, Kaiyan , Zhang, Guowei , Li, Yanglong et al. A Comparative Shaking Table Study on Inelastic Torsion and Torsional Performance of Conventional Thermal Power Plant Main Building and Thermal Power Plant Main Building with the Buckling-Restrained Braces . | JOURNAL OF STRUCTURAL ENGINEERING , 2022 , 148 (9) . |
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Abstract ：
In this study, detailed finite element analysis was conducted to examine the seismic performance of square and circular hollow steel braces under axial cyclic loading. Finite element models of braces were constructed using ABAQUS finite element analysis (FEA) software and validated with experimental results from previous papers to expand the specimen's matrix. The influences of cross-section shape, slenderness ratio, and width/diameter-to-thickness ratio on hysteretic behavior and compressive-tensile strength degradation were studied. Simulation results of parametric studies show that both square and circular hollow braces have a better cyclic performance with smaller slenderness and width/diameter-to-thickness ratios, and their compressive-tensile resistances ratio significantly decreases from cycle to cycle after the occurrence of the global buckling of braces.
Keyword ：
finite element models finite element models seismic performance seismic performance axial cyclic loading axial cyclic loading braces braces compressive-tensile strength degradation compressive-tensile strength degradation
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| GB/T 7714 | Hussain, Hubdar , Gao, Xiangyu , Shi, Anqi . A Finite Element Study on Compressive Resistance Degradation of Square and Circular Steel Braces under Axial Cyclic Loading [J]. | APPLIED SCIENCES-BASEL , 2021 , 11 (13) . |
| MLA | Hussain, Hubdar et al. "A Finite Element Study on Compressive Resistance Degradation of Square and Circular Steel Braces under Axial Cyclic Loading" . | APPLIED SCIENCES-BASEL 11 . 13 (2021) . |
| APA | Hussain, Hubdar , Gao, Xiangyu , Shi, Anqi . A Finite Element Study on Compressive Resistance Degradation of Square and Circular Steel Braces under Axial Cyclic Loading . | APPLIED SCIENCES-BASEL , 2021 , 11 (13) . |
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Abstract ：
In order to solve the problems of weak lateral resistance and inadequate seismic defense of traditional air condenser bracket structures, two air-cooled bent frame specimens were designed and manufactured. One was consisting of two concrete pipe columns with conventional diameter, the other was consisting of two pipe columns with minor diameter and a multi-segment-connected buckling-restrained brace (BRB). The seismic tests of two bent structures under cyclic loading were carried out, and the seismic performance was compared and analyzed, including the cracking state and its development process of pipe columns, horizontal force-lateral displacement hysteresis curves, stiffness degradation, skeleton curves and so on. The characteristics of the axial force and deformation hysteresis curves of the single diagonal BRB and the working mechanism improving the seismic performance were studied. The tests prove that the BRB starts yielding to dissipate seismic energy when the lateral displacement angle is about 1/750, and it does not fail until the angle reaches about 1/30, which increases the structural damping and stablizes the energy dissipation, the earthquake-resistant capability is increased significantly. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
Keyword ：
Concretes Concretes Concrete pipe Concrete pipe Earthquake engineering Earthquake engineering Seismic waves Seismic waves Earthquakes Earthquakes Hysteresis Hysteresis Energy dissipation Energy dissipation
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| GB/T 7714 | Zhao, Zetao , Gao, Xiangyu , Liu, Yakai et al. Experimental study on seismic behavior of concrete pipe column shelf and minor diameter pipe column BRB shock absorbing shelf [J]. | Journal of Building Structures , 2021 , 42 (3) : 80-89 . |
| MLA | Zhao, Zetao et al. "Experimental study on seismic behavior of concrete pipe column shelf and minor diameter pipe column BRB shock absorbing shelf" . | Journal of Building Structures 42 . 3 (2021) : 80-89 . |
| APA | Zhao, Zetao , Gao, Xiangyu , Liu, Yakai , Wang, Yongqiang , Liu, Kaiyan , Wang, Zuojie et al. Experimental study on seismic behavior of concrete pipe column shelf and minor diameter pipe column BRB shock absorbing shelf . | Journal of Building Structures , 2021 , 42 (3) , 80-89 . |
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Abstract ：
Short-time Fourier transformation (STFT) has been widely recognized as an intuitive time-frequency analysis method. However, its application in building structures is constrained by its low accuracy of low-frequency recognition in short data. Accordingly, an all-phase chirp-z transformation (AP-CZT) proposed for frequency recognition in building structures. Specifically, the autoregressive (AR) model, which has a proposed order determination algorithm, is used to solve the problem of data length limitation in the all-phase data process. Subsequently, an algorithm based on absolute inverse proportional function (AIP) is developed for post-refinement frequency correction. To verify its actual application, the ap-CZT method is used to analyze simulating finite element model and white noise feedback data from the actual shake table. The ap-CZT method is proven to be capable of correctly finding high-order frequencies. Moreover, it can accurately identify signal frequencies in short data. Therefore, the ap-CZT method can be applied as a frequency identification method in STFT in the field of building structures.
Keyword ：
all-phase all-phase frequency identification frequency identification architectural structures architectural structures frequency correction frequency correction data extrapolation data extrapolation
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| GB/T 7714 | Li, Yanglong , Gao, Xiangyu . A frequency identification method suitable for all-phase spectral refinement of architectural structures [J]. | LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES , 2020 , 17 (5) . |
| MLA | Li, Yanglong et al. "A frequency identification method suitable for all-phase spectral refinement of architectural structures" . | LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES 17 . 5 (2020) . |
| APA | Li, Yanglong , Gao, Xiangyu . A frequency identification method suitable for all-phase spectral refinement of architectural structures . | LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES , 2020 , 17 (5) . |
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Abstract ：
The characteristics of the lateral and torsional seismic responses of steel braced concrete frame structures are studied. It is revealed that the dynamic buckling of steel brace will have an impact on the resistance torque during the repeated loading process, and the plastic hinge state of the structure will change imbalanced, resulting in inelastic torsion. By using D'alembert principle, the mechanism of the steel braced structure causing inertial force, inertial torque and inelastic torsional surge induced by the brace buckling is studied, and the similar performance is verified by shaking table test and finite element nonlinear analysis. The anti-torsion effect of buckling-restrained braces on structures and the working mechanism of preventing inelastic torsional burst of structures are studied. Finally, suggestions are proposed to use the ordinary steel braces as the first seismic defense line of CBF concrete frame structures, and the technical measures of using buckling-restrained braces to reduce of inelastic torsion are given. Copyright ©2020 Engineering Mechanics. All rights reserved.
Keyword ：
Concretes Concretes Nonlinear analysis Nonlinear analysis Torsional stress Torsional stress Structural frames Structural frames Seismology Seismology Dynamics Dynamics Buckling Buckling
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| GB/T 7714 | Gao, Xiang-Yu , Li, Yang-Long , Li, Jian-Qin et al. Study on the mechanism of torsion induced by steel brace dynamic buckling and the mechanism of torsion reduction supplied by BRB [J]. | Engineering Mechanics , 2020 , 37 (11) : 83-96 and 107 . |
| MLA | Gao, Xiang-Yu et al. "Study on the mechanism of torsion induced by steel brace dynamic buckling and the mechanism of torsion reduction supplied by BRB" . | Engineering Mechanics 37 . 11 (2020) : 83-96 and 107 . |
| APA | Gao, Xiang-Yu , Li, Yang-Long , Li, Jian-Qin , Xu, Ji-Min . Study on the mechanism of torsion induced by steel brace dynamic buckling and the mechanism of torsion reduction supplied by BRB . | Engineering Mechanics , 2020 , 37 (11) , 83-96 and 107 . |
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Abstract ：
带有内接约束的全钢多段连接超长防屈曲支撑，属于土木工程结构消能减震(振)技术领域。其特征在于，包含多个分段，每个分段包括钢芯、钢套管、粘贴于钢芯表面柔性材料、端部间隙材料、还包括对接段构造，对接段包括连接板；将竖向加强钢板与钢套管焊接拼装成子约束构件，又将连接板与子约束构件进行段焊连接。进一步，对接段包括水平向槽形焊口、竖向槽形焊口、内部对接处封闭套管、中间对接段封闭套管及膨胀材料和封闭套管密封盖。本实用新型适用于大型工业结构以及交通结构等。屈服承载力、弹性刚度及弹塑性刚度可按设计进行控制。对于提高大型结构的功能性、调整结构薄弱部位、消减地震能量、降低地震反应具有明显作用。
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| GB/T 7714 | 高向宇 , 王作杰 , 刘亚凯 et al. 带有内接约束的全钢多段连接超长防屈曲支撑 : CN201920712123.6[P]. | 2019-05-17 . |
| MLA | 高向宇 et al. "带有内接约束的全钢多段连接超长防屈曲支撑" : CN201920712123.6. | 2019-05-17 . |
| APA | 高向宇 , 王作杰 , 刘亚凯 , 凌利改 . 带有内接约束的全钢多段连接超长防屈曲支撑 : CN201920712123.6. | 2019-05-17 . |
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Abstract ：
The characteristics of seismic-induced inelastic torsion in frame-bent structures in the main buildings of large thermal power plants are investigated. On the basis of a real engineering design scheme, nonlinear finite element models for seismic time-history analysis are established in SAP2000. The variation of structural lateral displacement, nonlinear torsion and the internal forces of main structural elements are analyzed. It is revealed that the buckling of the steel braces is the main reason for the nonlinear torsion and its rapid increment. The presence of nonlinear torsion contributes to a distortional displacement field, and could be harmful to the key elements of low ductility that connect the roof truss or crane hoist etc. to the structure. The ratio of torsional displacement to lateral displacement defined in some standards is studied to find that it hardly suites to the situation of inelastic torsion. This phenomenon and its reason are analyzed. Some technical suggestions to decrease the nonlinear torsion are put forward. © 2017, Engineering Mechanics Press. All right reserved.
Keyword ：
Roofs Roofs Seismic design Seismic design Trusses Trusses Thermoelectric power plants Thermoelectric power plants Concrete bridges Concrete bridges Torsional stress Torsional stress Seismology Seismology
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| GB/T 7714 | Gao, Xiang-Yu , Xu, Ji-Min , Li, Yang-Long et al. Inelastic torsion characteristics and design suggestions for steel frame-bent structures in the main buildings of thermal power plants [J]. | Engineering Mechanics , 2017 , 34 (10) : 188-199 . |
| MLA | Gao, Xiang-Yu et al. "Inelastic torsion characteristics and design suggestions for steel frame-bent structures in the main buildings of thermal power plants" . | Engineering Mechanics 34 . 10 (2017) : 188-199 . |
| APA | Gao, Xiang-Yu , Xu, Ji-Min , Li, Yang-Long , Zhang, Ling-Wei , Wang, Yong-Qiang , Liu, Kai-Yan . Inelastic torsion characteristics and design suggestions for steel frame-bent structures in the main buildings of thermal power plants . | Engineering Mechanics , 2017 , 34 (10) , 188-199 . |
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Abstract ：
For increasing the seismic capabilities of existing concrete frames, a steel frame with buckling-restrained braces (BRBs) is externally added without significant increment of inner forces within the existing frame. One pure concrete frame model and two concrete frame models retrofitted with externally added BRB steel frames were designed and manufactured, and statically cyclic loading tests were conducted. Seismic performance of the structures, including the status of cracks and failures, the hysteretic shear force-lateral displacement curves, the skeleton curves, the degradation of equivalent stiffness, the equivalent damping ratio, and the relation between strain and shear force in the external steel frames and the concrete beams, has been investigated through the tests. It is indicated that with the externally added steel frames, the hysteretic shear force-displacement curves have full shapes while the failure mechanism is improved reasonably, and BRBs can dissipate seismic energy stably. Shear bearing capacity of the retrofitted structures can increase by at least two times than that of the existing concrete frame. The existing structure, the added steel frames and the installed BRBs coordinate well. Within the seismic design target, the brittle compression-shear failure of concrete columns can thus be avoided. Finally, the design suggestions for improving the connection details of the externally added steel frames has been put forward. © 2017, Editorial Office of Journal of Building Structures. All right reserved.
Keyword ：
Steel testing Steel testing Hysteresis Hysteresis Concrete testing Concrete testing Cyclic loads Cyclic loads Seismic design Seismic design Seismology Seismology Stiffness Stiffness Structural frames Structural frames Energy dissipation Energy dissipation Concrete beams and girders Concrete beams and girders Failure (mechanical) Failure (mechanical) Steel construction Steel construction
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| GB/T 7714 | Xu, Shuai , Gao, Xiangyu , Wu, Jun et al. Seismic behavior of concrete frames retrofitted with externally added seismic reductional steel frames [J]. | Journal of Building Structures , 2017 , 38 (8) : 25-34 . |
| MLA | Xu, Shuai et al. "Seismic behavior of concrete frames retrofitted with externally added seismic reductional steel frames" . | Journal of Building Structures 38 . 8 (2017) : 25-34 . |
| APA | Xu, Shuai , Gao, Xiangyu , Wu, Jun , Ren, Jie . Seismic behavior of concrete frames retrofitted with externally added seismic reductional steel frames . | Journal of Building Structures , 2017 , 38 (8) , 25-34 . |
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Abstract ：
本发明涉及建筑结构抗震和消能减震技术领域，尤其涉及一种BRB锁止剪切变形节点连接器及其安装方法，包括预埋件、BRB连接件和剪切变形锁止装置，第一预埋板与第二预埋板均通过预埋抗剪件分别与框架节点的梁端和框架节点的柱端连接，BRB连接件相邻的两侧边分别与第一预埋板和第二预埋板接触连接，剪切变形锁止装置固定于预埋件上且对BRB连接件的端部进行剪切变形的锁止。本发明的连接器在受压时，BRB连接件对预埋件作用，将BRB压力转化为预埋件所承受的压力和剪切力，在受拉时，BRB连接件端部对剪切变形锁止装置分别施以水平和竖直方向的力，剪切变形锁止装置与预埋件固定连接，可将BRB连接件所受的拉力转化为预埋件所承受的剪切力。
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| GB/T 7714 | 高向宇 , 刘亚凯 , 周佳锋 . 一种BRB锁止剪切变形节点连接器及其安装方法 : CN201610413027.2[P]. | 2016-06-13 . |
| MLA | 高向宇 et al. "一种BRB锁止剪切变形节点连接器及其安装方法" : CN201610413027.2. | 2016-06-13 . |
| APA | 高向宇 , 刘亚凯 , 周佳锋 . 一种BRB锁止剪切变形节点连接器及其安装方法 : CN201610413027.2. | 2016-06-13 . |
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Abstract ：
一种可释放单一方向位移及其转角的辊轴支座及作法属于钢筋混凝土结构、钢结构等减少缝隙设置以及消除温度应力的辊轴支座。该支座包括基板子系统、辊轴子系统、限位子系统和防护子系统；其中，基板子系统由下基板和上基板构成；辊轴子系统由空心辊子、空心辊子内设置的轴、两块水平板件、两对竖向板件构成，竖向板件开设有椭圆孔；限位子系统由一对限位板件以及一对销栓键构成；防护子系统由连接角钢、铰链和防护板构成。本发明提供一种具有经济适用、施工方便、减少应力等优点的支座形式，可保证工程结构支座位置不受损害的可单向移动的辊轴支座系统及做法，以其有效解决桥梁结构、工业与民用建筑体系大跨度支座的设置问题。
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| GB/T 7714 | 高向宇 , 凌利改 , 杨风雷 et al. 一种可释放单一方向位移及其转角的辊轴支座及作法 : CN201510850218.0[P]. | 2015-11-29 . |
| MLA | 高向宇 et al. "一种可释放单一方向位移及其转角的辊轴支座及作法" : CN201510850218.0. | 2015-11-29 . |
| APA | 高向宇 , 凌利改 , 杨风雷 , 吴爽 . 一种可释放单一方向位移及其转角的辊轴支座及作法 : CN201510850218.0. | 2015-11-29 . |
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