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学者姓名：何浩祥
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Abstract ：
Although the tuned mass damper (TMD) is characterized by simple construction, a definite damping mechanism, and a strong damping effect, a narrow damping frequency band, a detuning effect, and large occupied space limit its application in practical engineering. Particle dampers have the advantages of damping frequency bandwidth and small space, but the damping effect is unsatisfactory. Therefore, a new combined damping system (CTP) containing a TMD and a multiple unidirectional single-particle damper (MUSPD) was developed. A series of shaking table tests for a controlled and uncontrolled structure were conducted to investigate the performance of the system, and the damping effects of a TMD, MUSPD and CTP subjected to harmonic excitation, normal ground motions, rock ground motions, and soft ground motions were compared and analyzed. Finally, a mechanical model of the CTP and corresponding numerical simulation method were developed based on its damping mechanism. The results indicate that a CTP can effectively integrate the advantages of a TMD and MUSPD, and exhibits a better damping effect, wider damping frequency band, and stronger robustness. The shaking table test demonstrates the rationality and feasibility of a simulation method for a CTP.
Keyword ：
Shaking table test Shaking table test Tuned mass damper Tuned mass damper Numerical simulation Numerical simulation Structural vibration control Structural vibration control Particle damper Particle damper
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| GB/T 7714 | Wang, Bao-Shun , He, Hao-Xiang , Chen, Yi-Fei et al. Experimental and performance analysis of the combined damping system with a TMD and a multiple unidirectional single-particle damper [J]. | JOURNAL OF SOUND AND VIBRATION , 2022 , 540 . |
| MLA | Wang, Bao-Shun et al. "Experimental and performance analysis of the combined damping system with a TMD and a multiple unidirectional single-particle damper" . | JOURNAL OF SOUND AND VIBRATION 540 (2022) . |
| APA | Wang, Bao-Shun , He, Hao-Xiang , Chen, Yi-Fei , Cheng, Shi-Tao . Experimental and performance analysis of the combined damping system with a TMD and a multiple unidirectional single-particle damper . | JOURNAL OF SOUND AND VIBRATION , 2022 , 540 . |
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Abstract ：
Additional damping ratio (ADR), which plays a significant role in damped structure design, is broadly utilized to evaluate damping effect of the dampers. In current method, the ratio of energy dissipated by the dampers in one complete cycle to maximum strain energy of the structural system is adopted as the value of ADR. In the computation of damper energy dissipation, the bilinear model is commonly used to characterize hysteresis behavior of displacement-dependent dampers such as BRB. However, the accuracy of the bilinear model is not precise enough. In the light of the Bouc-Wen model can accurately characterize hysteresis behavior of various dampers, the analytical solution of hysteresis energy is derived. The ADR calculation methods based on the strain energy and the energy dissipated by the inherent damping of the main structure are proposed, respectively. The bi-objective design method of the RC frame with BRBs is put forward. The damping effect of the dampers is included in the design objectives, which makes up the deficiency of single objectives with the story drift ratio. The design objectives are that the story drift ratio of the frame does not exceed the limit, and the damping ratio reaches the expected value. The layout and force of the dampers are taken as design variables. Based on the finite element method, a RC frame with BRBs is designed iteratively. The reasonable time period length of time-varying energy is determined. Meanwhile, the strain energy method and modal damping energy dissipation method are compared and analyzed. As a result, the calculation result of strain energy method is larger than that of modal damping energy dissipation method. The strain energy method is hazardous to structural safety, and the modal damping energy dissipation method is suggested. The bi-objective design method is effective, which can further improve the structural performance.
Keyword ：
Bouc-Wen hysteresis model Bouc-Wen hysteresis model Bi-objective design Bi-objective design Buckling-restrained brace Buckling-restrained brace Strain energy Strain energy Additional damping ratio Additional damping ratio Modal damping energy dissipation Modal damping energy dissipation
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| GB/T 7714 | Wu, Shan , He, Haoxiang , Chen, Yifei et al. Calculation method of time-variant additional damping ratio and bi-objective design of RC frame with BRBs [J]. | STRUCTURES , 2021 , 33 : 2546-2558 . |
| MLA | Wu, Shan et al. "Calculation method of time-variant additional damping ratio and bi-objective design of RC frame with BRBs" . | STRUCTURES 33 (2021) : 2546-2558 . |
| APA | Wu, Shan , He, Haoxiang , Chen, Yifei , Chen, Jianwei . Calculation method of time-variant additional damping ratio and bi-objective design of RC frame with BRBs . | STRUCTURES , 2021 , 33 , 2546-2558 . |
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Abstract ：
In the light of the shortcomings of the calculation method for the diagonal crack width, a new method based on the bond-slip theory is proposed. In view of it is difficult to measure the external load or to predict the crack width accurately in actual earthquake scenario, it is difficult to evaluate the damage degree of seismic-damage column, the width calculation method of transverse cracks and diagonal cracks based on the flexural deformation and shear deformation is established. On this basis, a method and process for calculating the maximum crack width based on the horizontal displacement of the seismic-damaged RC column is proposed, and the analytical solution of the damage index of the RC column based on the crack width is obtained. The analysis of an example proves that the new method can be used to accurately calculate the crack width based on the horizontal displacement of the RC column, and the dynamic evolution process of the crack width and its failure mode can be revealed. In addition, the example analysis also proves that the damage value of the RC column obtained from the analytical solution of the damage index is reasonable and credible. This study can provide strong support for the rapid assessment of the seismic-damaged RC columns.
Keyword ：
Crack width Crack width Earthquake damage assessment Earthquake damage assessment Diagonal crack Diagonal crack Transverse cracks Transverse cracks Axial-flexure-shear interaction Axial-flexure-shear interaction Reinforced concrete column Reinforced concrete column
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| GB/T 7714 | Cheng, Shitao , He, Haoxiang , Lan, Bingji . Calculation theory and damage analysis on crack width of RC seismic-damaged columns [J]. | STRUCTURES , 2021 , 34 : 3329-3344 . |
| MLA | Cheng, Shitao et al. "Calculation theory and damage analysis on crack width of RC seismic-damaged columns" . | STRUCTURES 34 (2021) : 3329-3344 . |
| APA | Cheng, Shitao , He, Haoxiang , Lan, Bingji . Calculation theory and damage analysis on crack width of RC seismic-damaged columns . | STRUCTURES , 2021 , 34 , 3329-3344 . |
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Abstract ：
Despite the popularity of precast concrete (PC) composite beams in urban construction, some shortcomings still exist in application. These include easy cracking, poor deformation ability, susceptibility to impact damage. To solve the above problems, engineered cementitious composites (ECC) are applied in the tension zone of PC beam specimens to improve the mechanical properties. Eleven specimens are designed and loaded. An analysis of the bending behavior is presented considering the effects of the precast ECC plate thickness, reinforcement connection mode, and reinforcement ratio on the bending performance. The mechanical characteristics of each stage are analyzed in detail. The crack width development trend is measured. Results show that the bearing capacity and ductility of the PC beams with precast ECC plates and post-pouring zones are higher than those of reinforced concrete (RC) beams; The calculation method given in this paper can reflect the mechanical performance well. The reinforcement stress can be effectively transmitted by a sleeve or hoop connection; the precast ECC plate can effectively control the crack width. The PC beam with ECC baseplate and post pouring area presented in this paper has good mechanical performance and is suitable for engineering construction.
Keyword ：
Composite beam Composite beam Precast concrete Precast concrete ECC ECC Crack control Crack control Damage analysis Damage analysis
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| GB/T 7714 | Cui, Tao , He, Haoxiang , Zhao, Xinli et al. Bending performance analysis of precast composite beams with precast ECC plate [J]. | STRUCTURES , 2021 , 33 : 986-998 . |
| MLA | Cui, Tao et al. "Bending performance analysis of precast composite beams with precast ECC plate" . | STRUCTURES 33 (2021) : 986-998 . |
| APA | Cui, Tao , He, Haoxiang , Zhao, Xinli , Zhou, Daxing . Bending performance analysis of precast composite beams with precast ECC plate . | STRUCTURES , 2021 , 33 , 986-998 . |
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Abstract ：
地震动广义动力放大系数谱及其特性研究
Keyword ：
反应谱 反应谱 动力放大系数 动力放大系数 标准差谱 标准差谱 抗震设计 抗震设计 地震动 地震动
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| GB/T 7714 | 何浩祥 , 丁佳伟 , 程时涛 et al. 地震动广义动力放大系数谱及其特性研究 [J]. | 何浩祥 , 2021 , 40 (5) : 170-178 . |
| MLA | 何浩祥 et al. "地震动广义动力放大系数谱及其特性研究" . | 何浩祥 40 . 5 (2021) : 170-178 . |
| APA | 何浩祥 , 丁佳伟 , 程时涛 , 振动与冲击 . 地震动广义动力放大系数谱及其特性研究 . | 何浩祥 , 2021 , 40 (5) , 170-178 . |
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Abstract ：
传统地震动力放大系数谱是根据地震动最大加速度和结构最大加速度而确定的,没有充分虑及时域非平稳性。通过比较不同周期结构最大反应出现时刻和地震动峰值出现时刻,验证极大峰值对结构反应同样有重要的作用。提出考虑若干极大峰值作用的等效动力放大系数谱的概念,计算不同场地类型下的统计谱并验证其保守性。鉴于考虑频域非平稳性的动力放大系数标准差谱的合理性,计算相关统计谱并确认其在长周期段谱值较高。综合考虑传统谱、等效谱和标准差谱的特点,基于三种谱外包络提出具有足够的保守性的广义动力放大系数谱的概念。建立广义动力放大系数谱与传统谱的比值拟合公式。通过算例验证按广义动力放大系数谱进行结构抗震设计或验算具有更高的安全...
Keyword ：
反应谱 反应谱 地震动 地震动 标准差谱 标准差谱 动力放大系数 动力放大系数 抗震设计 抗震设计
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| GB/T 7714 | 何浩祥 , 丁佳伟 , 程时涛 . 地震动广义动力放大系数谱及其特性研究 [J]. | 振动与冲击 , 2021 , 40 (05) : 170-178 . |
| MLA | 何浩祥 et al. "地震动广义动力放大系数谱及其特性研究" . | 振动与冲击 40 . 05 (2021) : 170-178 . |
| APA | 何浩祥 , 丁佳伟 , 程时涛 . 地震动广义动力放大系数谱及其特性研究 . | 振动与冲击 , 2021 , 40 (05) , 170-178 . |
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Abstract ：
Particle dampers have good performance of vibration control and noise reduction, and they have been widely studied and applied in the field of high-frequency vibration control, such as aviation and mechanical engineering. However, the vibration characteristics of civil engineering structures are usually low frequency and low amplitude, which restricts the performance of particle dampers. A new type of particle damper, namely the multiple unidirectional single-particle damper (MUSPD), is advanced based on the comparative analysis of the construction characteristics, damping performance, and damping mechanism of a single-particle damper and multiparticle damper. Based on the analysis of the damping mechanism of MUSPD and the integral consideration of the stress state of particles, the mechanical model of MUSPD is established, and an efficient numerical calculation method with variable step size is proposed. For harmonic excitation, the relationship between the optimal motion distance of a particle and other parameters is established by theoretical analysis. In addition, the optimization analysis method of MUSPD subjected to ground motions is proposed, and the rationality and accuracy are all verified. The results show that MUSPD has a better damping effect than a classical particle damper. Because the MUSPD belongs to acceleration (force)-related dampers, the energy of the controlled structure will be transferred as long as the particles collide with the controlled structure, and the frequency richness and randomness of the ground motion spectrum enhance the probability of particles colliding with the controlled structure. Moreover, the site effect has no obvious influence on the damping effect of MUSPD, and it is more suitable for middle- and low-rise structures.
Keyword ：
Structure control Structure control Damping mechanism Damping mechanism Collision Collision Optimal collision distance Optimal collision distance Seismic control Seismic control Particle damper Particle damper
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| GB/T 7714 | He, Haoxiang , Wang, Baoshun , Yan, Weiming . Mechanical Model and Optimization Analysis of Multiple Unidirectional Single-Particle Damper [J]. | JOURNAL OF ENGINEERING MECHANICS , 2021 , 147 (7) . |
| MLA | He, Haoxiang et al. "Mechanical Model and Optimization Analysis of Multiple Unidirectional Single-Particle Damper" . | JOURNAL OF ENGINEERING MECHANICS 147 . 7 (2021) . |
| APA | He, Haoxiang , Wang, Baoshun , Yan, Weiming . Mechanical Model and Optimization Analysis of Multiple Unidirectional Single-Particle Damper . | JOURNAL OF ENGINEERING MECHANICS , 2021 , 147 (7) . |
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Abstract ：
The performance design for traditional steel rigid connection cannot fulfill the desired seismic requirements. Though beam column connection with weaken beam end can approximately realize the concept about "strong column-weak beam", the local buckling and the distortion buckling in the weaken zone and the total lateral damage maybe occur in rare earthquake and the capacity is not enough. The replacement connection with low-yield-point steel (LYPS) is proposed base on the idea of resilient structure, and its weakened parts in the flange slab and web plate are filled with LYPS. During earthquake, the LYPS primarily yields and fully dissipates energy. The damage of the main parts in the connection is minor and the LYPS can be replaced after the earthquake. According to the insufficiency of the traditional damage models, the damage model based on differential ratio of elastic plastic dissipated energy is proposed. Low cycle loading experimental research is carried out on three kinds of beam-column connections, which involve the classic connection, the beam end weaken connection and the replacement connection. Comprehensive assessments of damping performance are proposed through a variety of performance evaluation parameters. It is approved that the replacement connection has much more excellent bearing capacity, ductility and energy consumption ability. In addition, the proposed energy damage index can represent damage evolution process and damage law. Copyright (C) 2021 by The Hong Kong Institute of Steel Construction. All rights reserved.
Keyword ：
Damping performance Damping performance Energy dissipation Energy dissipation Low-yield-point steel Low-yield-point steel Damage index Damage index Resilient structure Resilient structure Beam-column connection Beam-column connection Seismic damage model Seismic damage model
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| GB/T 7714 | He, Hao-Xiang , Liao, Li-Can , Cheng, Shi-Tao . DAMPING PERFORMANCE EXPERIMENT AND DAMAGE ANALYSIS OF REPLACEMENT CONNECTION WITH LOW-YIELD-POINT STEEL [J]. | ADVANCED STEEL CONSTRUCTION , 2021 , 17 (2) : 169-180 . |
| MLA | He, Hao-Xiang et al. "DAMPING PERFORMANCE EXPERIMENT AND DAMAGE ANALYSIS OF REPLACEMENT CONNECTION WITH LOW-YIELD-POINT STEEL" . | ADVANCED STEEL CONSTRUCTION 17 . 2 (2021) : 169-180 . |
| APA | He, Hao-Xiang , Liao, Li-Can , Cheng, Shi-Tao . DAMPING PERFORMANCE EXPERIMENT AND DAMAGE ANALYSIS OF REPLACEMENT CONNECTION WITH LOW-YIELD-POINT STEEL . | ADVANCED STEEL CONSTRUCTION , 2021 , 17 (2) , 169-180 . |
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Abstract ：
The installation of energy dissipation devices on building structures can significantly reduce seismic damage. A brief review of first, second and third generation performance-based seismic design (PBSD) theories, and a comparative analysis of existing PBSD methods for energy-dissipated structure systems confirms that design methods based on force, displacement, and energy are inadequate. A more comprehensive approach is the damage-based design method, which can evaluate the seismic performance of structures. However, due to the lack of an analytical relationship between the additional equivalent damping ratio (AEDR) of dampers and the damage degree of the main structure, the current performance design method can only predict the expected damage via an iterative adjustment analysis of damper's design parameters. The authors addressed this problem by analyzing the damage mechanism of the energy-dissipated structure system's core area from the perspective of energy dissipation. It is established an analytical relationship between the AEDR and the damage index of the main structure with dampers via a damage model based on the energy difference ratio and the time-varying AEDR calculation of dampers subjected to ground motions. With this new approach to seismic vulnerability analysis, the performance design flow of the seismic structure system is based on damage control. A case study verifies the accuracy of the damage-degree based AEDR calculation. The proposed damage-based method effectively controls the damage degree of the main structure to the expected damage target. This method is compatible with the displacement-based design method, and which also enriches the research contents of structural seismic design and damage analysis in the third generation PBSD.
Keyword ：
Time-varying damping ratio Time-varying damping ratio Performance design Performance design Damage control Damage control Energy-dissipated structure Energy-dissipated structure Dampers Dampers
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| GB/T 7714 | Bao-shun, Wang , He, Hao-xiang , Wei-ming, Yan . Seismic performance design of energy-dissipated structure system based on damage control and time-varying damping ratio [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2021 , 151 . |
| MLA | Bao-shun, Wang et al. "Seismic performance design of energy-dissipated structure system based on damage control and time-varying damping ratio" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 151 (2021) . |
| APA | Bao-shun, Wang , He, Hao-xiang , Wei-ming, Yan . Seismic performance design of energy-dissipated structure system based on damage control and time-varying damping ratio . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2021 , 151 . |
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Abstract ：
In order to realize the fully stressed criterion, that is, the stress of the nonlinear engineering structure is uniform along the height direction under the action of wind load or ground motion, the section size of the continuous structure is optimized based on mechanical analysis. The engineering structure is simplified as a continuous cantilever with variable cross-section, and its material constitution is nonlinear. The wind load and ground motion are represented by three kinds of horizontal static loads: uniform load, inverted triangle load, and inertia force related load. In order to meet the needs of different projects, hollow circular section and box section are designed, respectively. By establishing different expressions of section moment, the optimal section size distribution is solved. Then the optimal stiffness distribution of nonlinear structure is proposed. The correctness of the theory is verified by the finite element method. The results are suitable for the elastic and elastic-plastic stages of the structure, and are effective for both static loads and dynamic actions. The optimal section size distribution and structural shape are different under different loads. Finally, a practical design example is shown.
Keyword ：
nonlinear continuous structures nonlinear continuous structures fully stressed criterion fully stressed criterion seismic action seismic action section size optimization section size optimization optimal stiffness distribution optimal stiffness distribution
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| GB/T 7714 | Wu, Shan , He, Haoxiang , Chen, Yifei . Static and dynamic size optimization of nonlinear continuous structure based on fully stressed design [J]. | ADVANCES IN STRUCTURAL ENGINEERING , 2021 , 24 (9) : 1926-1940 . |
| MLA | Wu, Shan et al. "Static and dynamic size optimization of nonlinear continuous structure based on fully stressed design" . | ADVANCES IN STRUCTURAL ENGINEERING 24 . 9 (2021) : 1926-1940 . |
| APA | Wu, Shan , He, Haoxiang , Chen, Yifei . Static and dynamic size optimization of nonlinear continuous structure based on fully stressed design . | ADVANCES IN STRUCTURAL ENGINEERING , 2021 , 24 (9) , 1926-1940 . |
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