[2] Seismic and Vibration Reductionn of Structures

2020-10-15 Hits:

• Mainly engaged in the study of structural energy dissipation and active control algorithms and other aspects of research. The theory and method of energy dissipation are studied deeply, and many achievements have been made in theory, experiment and application of damper.

  Theoretical research：a series of displacement dampers (such as metal yielding type, friction type damper) and combined dampers (such as metal friction type) have been researched and developed, and the dampers are verified numerically. An improved energy dissipation method for the energy dissipation device which can consider the flat - torsion coupling effect is established, and the dynamic time history analysis method of the flat - torsion coupling deformation of the energy dissipation structure is deeply studied. The calculation method and the checking process of the additional axial force of frame column with energy dissipation brace are put forward, and the design flow of energy dissipation structure is improved, and the energy dissipation technology is further improved. The results show that the proposed dampers effectively reduce the seismic effect and have good seismic performance. At the same time, in order to facilitate the popularization of engineering application, a displacement-based seismic design method is proposed. The design method is based on the structural component design and the energy dissipation device is supplemented by strength. It is suggested that the method of acceleration to absolute displacement The displacement response spectrum is established and the iterative process is reduced. The accuracy and practicability of the design method are verified by acceleration time history analysis respectively, and the integration of structural design and application is realized.

               

                  Figure 1     comparison of physical and modeling

Experimental research: the pseudo-dynamic and simulated earthquake shaking table tests are carried out on the developed damper. The experimental results show that the proposed displacement dampers not only have good hysteretic behavior and low cycle fatigue properties, at the same time ,the material is easy to get, the cost is relatively low, saving construction costs, the design idea of providing initial stiffness of the structure under small earthquake and the consumption of seismic energy under the large earthquake is realized. And the numerical results are compared with each other, the results was matched well and show that the property of dampers are stable.

Figure 2     experimental simulation diagram

Engineering applications: the development of a series of energy dissipation devices have been successfully used a number of practical projects, the technology greatly enhance the seismic safety sense of housing construction, ensure the safety of housing and even normal use after the earthquake, so as to better protect the people’s lives and property security

Software application: the calculation method of energy dissipation structure parameters and the improved variable energy ratio are established, the method consider the torsional coupling effect，the method is used by the SATWE design software developed by the China Academy of Building Research to calculate the energy dissipation structure parameters, more than 90% domestic architectural design units have introduced this software. From ordinary housing construction, to major projects, basically use this software to design, and extended to Singapore, Vietnam, Hong Kong, Taiwan and other Southeast Asian countries and regions. Integrated of technical achievements into software, and with the software in the country's universal application, resulting in a certain social and economic benefits.

Active Control:In the structure active control, the research mainly concentrates on the control algorithm aspect. Lead market competition mechanism into large complex structure control, the use of the market to simulate the complex control system. Based on the theory of fuzzy mean clustering, a large-scale complex structure boundary partition method is proposed, the large-scale complex structure information data matrix is established to realize the boundary division of large and complex structures based on fuzzy logic. Combining fuzzy logic theory with market competition mechanism, offered MBC fuzzy Price rules extraction method, and established a multi-market control system and control methods. The MBC-based experimental study of the physical model is carried out for the first time, and the market competition mechanism is applied to large-span bridges and large-scale reticulated shells. Considering the influence of seismic multi-dimensional spatial characteristics, base on MBC theoty, a large-scale complex structure vibration control system are established.

 

Introduction of the results:In the field of structural damping and seismic technology research, won a dozen national invention patents, published a number of high-level periodicals. At the same time, the development and engineering application of energy dissipation device as an important component, acquired the second prize of 2007 National Science and Technology Progress Award , the second prize of 2010 National Science and Technology Progress Award

Thesis

 

[1] Gang Li, Hong-Nan Li. Seismic response analysis of structure with energy dissipation devices using force analogy method [J]. The Structural Design of Tall and Special Buildings. 2011, 20(3): 291-313.  

[2]  Gang Li, Hong-Nan Li. Experimental Study and Application of “Dual Functions” Metallic Damper.[J]. Advanced Steel Construction. 2013, 9(3): 247-258.  

[3]  Gang Li, Hongnan Li. Experimental study and application of metallic yielding-friction damper.[J].  Journal of Earthquake and Tsunami, 2013, 7(3), 12-25.

[4]  Gang Li, Wen Wang and Hongnan Li. Experimental and Application of Market-Based Control for engineering structures.[J].  Journal of Applied Mathematics, 2013, dx.doi.org/ 10.1155/ 2013/ 219537.

[5]  Gang Li, Qifeng Liu, Hongnan Li. Inelastic Structural Control Based on MBC and FAM [J].   Mathematical Problems in Engineering, vol. 2011, Article ID 460731, 18 pages, 2011.

[6]  Gang Li, Hongnan Li and Qifeng Li.Application of fuzzy control with market-based control strategy to structures [J]. Mathematical Problems in Engineering, 2013, dx.doi.org/10.1155/2013/132010.

[7]  Xiaoyan Hao, Hongnan Li, Gang Li et al. Experimental investigation of steel structure with innovative H-type steel unbuckling braces,The Structural Design of Tall and Special Buildings, 2014,23(14):1064-1082.

[8]  Hongnan Li, Gangbing Song, Jeong-Tae Kim and Gang Li. Smart control algorithms and technology in civil infrastructures,  Mathematical Problems in Engineering, 2013, Article ID 842802, : dx.doi.org/ 10.1155/ 2013/842802.

[9]  Hongnan Li, Gang Li. Experimental study of structure with dual functions metallic damper,  Engineering Structures, 2007, 29(8): 1917-1928.

[10] Hongnan, Li, Gang Li. Simplified method for pushover curves of asymmetric structure with displacement-dependent passive energy dissipation devices, Advances in Structural Engineering, 2007,10(5),537-549.

[11]李 钢, 李宏男, 王文. 大型复杂结构模糊物理边界划分与多市场竞争控制.[J].土木工程学报，2011，44(6) : 39-46. (EI)

[12]李 钢，李宏男，李云贵，考虑平扭耦联效应的消能减震结构振动反应分析.[J]. 建筑结构学报，2009, 30(6)：86-93.  (EI)

[13]李 钢, 李宏男，李瀛. 基于拟立法的消能减震结构地震反应分析. 土木工程学报， 2009， 42（4）：55-63. (EI 收录)

[14]李 钢, 刘啟凤, 李宏男. 基于拟力法的MBC非线性控制. 振动工程学报, 2010，23(3) : 324-332.  (EI)

[15]李 钢, 李宏男. 装有“双功能”软钢阻尼器框架结构振动台试验与分析. 振动与冲击，2010，29(8) : 164-168. (EI)

[16]李 钢, 王文. 基于MMBC的网壳结构振动控制. 土木建筑与环境工程, 2011，33(S1): 58-64.

[17]李 钢, 李宏男. 位移型耗能减震结构对框架柱轴力影响的研究. 建筑结构, 2009(2):25-27.

[18]李 钢, 李宏男. 多维地震作用下非对称结构利用"双功能"软钢阻尼器减震设计.工程抗震与加固改造, 2008, 30(2):5-9.

[19]李 钢, 李宏男. 基于位移的消能减震结构抗震设计方法. 工程力学, 2007, 24(9):88-94.

[20]李 钢, 李宏男. 新型软钢阻尼器的减震性能研究[J]. 振动与冲击, 2006, 25(3):66-72.

[21]王  文, 李 钢. 基于MBC的模型结构振动控制实验研究. 振动与冲击, 2012，31(4): 81-85. (EI)

[22]李中军, 李 钢, 李宏男, 邢福国. 消能减振技术在结构薄弱层中的应用. 结构工程师, 2010，26(3): 110-115.

[23]李中军, 张吾愈, 李 钢, 李宏男, 张金库, 宋士伟. 消能支撑在某钢结构工程中的应用. 建筑结构, 2011，41(10): 76-78.

[24]张 宇, 李宏男, 李 钢. 考虑钢筋锈蚀的震损结构抗震性能评估. 建筑科学与工程学报, 2011，28(4): 97-105.

[25]曲激婷，李宏男， 李 钢. 位移型消能器在结构减震控制中的位置优化研究[J].工程力学， 2009,26（1）： 43-48. (EI)

Patent

[1] 发明专利，ZL201310666462.2，自复位梁-隔栅式摩擦墙结构体系，李钢，朱立华，李宏男

[2] 实用新型专利，ZL201320809300.5，自复位梁-隔栅式摩擦墙结构体系，李钢，朱立华，李宏男

[3] 实用新型发明专利，ZL201320809250.0，框架-支撑摇摆跨结构体系，李钢，张宇，李宏男

[4] 发明专利，ZL201210421637.9, 一种多维碰撞耗能质量摆阻尼器, 林友新，李宏男，付兴，李钢

[5] 实用新型专利，ZL 2013 2 0732994.7，多维形状记忆合金耗能阻尼器，李宏男，孙彤，李钢

[6] 实用新型专利，ZL201320808342.7，装配式砌块阻尼墙，李钢，张宇，李宏男

[7] 实用新型专利，ZL200720013398.8，梯型摩擦－屈服钢消能器，李钢，李宏男

[8] 实用新型专利，ZL200720013400.1，圆孔型摩擦－屈服钢消能器，李钢，李宏男

[9] 实用新型专利，ZL200720013401.6，一种金属摩擦－屈服阻尼器构造，李宏男，李钢

[10] 实用新型专利，ZL200720013399.2，双X型摩擦－屈服钢消能器，李宏男，李钢

[11] 实用新型专利，ZL200520200765.6，一种软钢阻尼器的构造，李宏男，李钢

[12] 软件著作权，软著登字第0166224号，建筑结构非线性动力分析软件V1. 李钢，李宏男等