1.Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;
2.Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China
Abstract：Hybrid simulation is a powerful and cost-effective technique to evaluate structural dynamic performance. However, when the boundary of a physical substructure has many DOFs, its boundary condition is difficult to be fully realized, while absence of boundary conditions is bound to change the stress state of the original structure and eventually affects the correctness of structure evaluation. Here, an online numerical simulation method based on model updating was proposed, it was called a novel hybrid simulation method considering incomplete boundary conditions. With the proposed method, two sets of numerical models with the same constitutive relation were built to be applied in the finite element (FE) analysis of the whole structure and the constitutive model parametric recognition of a physical substructure, respectively. The boundary conditions were naturally satisfied because a structure’s response was obtained with the whole structure’s numerical model, and the numerical model’s constitutive parameters were constantly modified on line based on the test results of physical specimens to improve the correctness of numerical calculation. Virtual hybrid simulations of a RC frame structure under incomplete boundary conditions were conducted. The results showed that the effect of incomplete boundary conditions is almost eliminated and the accuracy of the proposed hybrid simulation is improved.
[1] Hakuno M, Shidawara M, Hara T. Dynamic destructive test of a cantilever beam, controlled by an analog-computer [J]. Transactions of the Japan Society of Civil Engineers, 1969; 171:1–9.
[2] Wu B, Chen Y, Xu G, et al. Hybrid simulation of steel frame structures with sectional model updating [J]. Earthquake Engineering & Structural Dynamics, 2016, 45(8):1251-1269.
[3] Wu B, Zhou H. Sliding mode for equivalent force control in real-time substructure testing [J]. Structural Control and Health Monitoring 2014; 21(10):1284–1303.
[4] Wu B, Shi P, Ou J. Seismic performance of structures incorporating magnetorheological dampers with pseudo-negative stiffness. Structural Control and Health Monitoring, 2013, 20(3):405-421.
[5] 林元铮，田石柱. FRP 加固 RC 连续梁桥抗震性能试验研究[J]. 振动与冲击, 2016, 35(5): 21-26.
Lin Y, Tian S. Experimental study of a RC continuous girder bridge retrofitted by FRP Jacket [J]. Journal of Vibration and Shock, 2016, 35(5): 21-26. (in Chinese)
[6] 周大睿, 许国山, 吴斌, 等. 等效力控制方法在连梁阻尼器拟动力子结构试验中的应用[J]. 振动与冲击, 2011, 30(8): 72-76.
Zhou D, Xu G, Wu B, et al. Application of equivalent force control method for pseudo-dynamic substructure tests of coupling beam damper [J]. Journal of Vibration and Shock, 2011, 30(8): 72-76. (in Chinese)
[7] 张爱林, 张艳霞, 赵微. 可恢复功能的装配式预应力钢框架拟动力试验研究[J]. 振动与冲击, 2016, 35(5): 207-215.
Zhang A, Zhang Y, Zhao W, et al. Pseudo dynamic tests for a resilient prefabricated steel frame [J]. Journal of Vibration and Shock, 2016, 35(5): 207-215. (in Chinese)
[8] 陈再现, 姜洪斌, 张家齐,等. 预制钢筋混凝土剪力墙结构拟动力子结构试验研究[J]. 建筑结构学报, 2011, 32(6):41-50.
Chen Z, Jiang H, Zhang J, et al. Pseudo-dynamic substructure test on precast reinforced concrete shear wall structure [J]. Journal of Building Structures, 2011, 32(6):41-50. (in Chinese)
[9] 苏宇坤, 潘鹏, 邓开来,等. 子结构拟动力试验方法在老旧住宅外套式加固改造工程中的应用[J]. 建筑结构学报, 2014, 35(2):8-14.
Su Y, Pan P, Deng K, et al. Application of pseudo-dynamic substructure tests to old residential buildings retrofitted by exterior strengthening method [J]. Journal of Building Structures, 2014, 35(2):8-14. (in Chinese)
[10] 万里波, 余稚明, 蒋春云,等. 预制装配式剪力墙盒子结构拟动力试验研究[J]. 工程抗震与加固改造, 2016, 38(2):52-57.
Wan L, Yu Z, Jiang C, et al. Pseudo-dynamic testing and analysis of the precast shear-wall box module [J]. Earthquake Resistant Engineering and Retrofitting, 2016, 38(2):52-57. (in Chinese)
[11] 梅竹, 吴斌, 杨格. 钢筋混凝土结构材料本构模型参数的在线识别[J]. 工程力学, 2016, 33(7):108-115.
Mei Z, Wu B, Yang G. Online parameter identification of concrete constitutive model [J]. Engineering Mechanics, 2016, 33(7):108-115. (in Chinese)
[12] B.D. Scott, R. Park, M.J.N. Priestley. Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates [J]. ACI Journal, 1982, 79(2): 13-27.
[13] 张光澄. 非线性最优化计算方法[M]. 高等教育出版社, 2005.
Zhang G. Computational methods for nonlinear optimization [M]. Higher Education Press, 2005. (in Chinese)
[14] 杨格, 王贞, 吴斌,等. 建筑结构混合试验平台HyTest开发研究[J]. 建筑结构学报, 2015, 36(11):149-156.
Yang G, Wang Z, Wu B, et al. Development of HyTest for structural hybrid simulation [J]. Journal of Building Structures, 2015, 36(11): 149-156. (in Chinese)
