为了更加深入研究单层球面网壳的动力失效。结合一个K6型单层球面网壳振动台试验,设计出一套描述单层球面网壳强振倒塌全过程的测试方法,包括:冲击法测试结构自振特性、低频调幅加载评估损伤程度和基频简谐加载监测结构失效过程。结合数据测量结果,描绘出结构倒塌过程的变形时程,分析结构的基频、阻尼及振型,记录杆件进入塑性的顺序,探索结构损伤演化的规律及倒塌破坏的机理。最后考虑材料的损伤,进行有限元模拟,验证了模拟方法的正确性。
Abstract
In order to study deeply the dynamic failure process of single-layer spherical lattice shells, combining with shaking table tests of a K6 type single-layer spherical lattice shell, a set of vibration test methods describing the whole collapses process of singlelayer spherical shells under strong earthquakes was designed. It included the impact method measuring natural vibration characteristics of structures, the low frequency amplitudemodulation loading assessing structural damage level, and the fundamental frequency simple harmonic loading monitoring structural failure process. Based on the data results of measurement, the collapse process's deformation history of a structure was described. The fundamental frequency, damping and modal shapes of a structure were analyzed. The order of bars of a structure to enter a plastic state was recorded. The rules of structural damage evolution and collapse failure mechanism were explored. At last, considering material damage, the whole failure process of signle-layer spherical lattice shells was simulated with the FE method. Comparing with the test results, the correctness of the simulation method was verified.
关键词
振动台试验 /
变形时程 /
自振特性 /
损伤评估 /
失效全过程
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Key words
shaking table test /
deformation history /
natural vibration characteristics /
damage assessment /
the whole failure process
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参考文献
[1] Yujiro Hiyama,Hideyuki Takashima,Toshihiko lijima,and Shiro Kato. Buckling Behavior of Aluminum Ball Jointed Single Layered Reticular Domes [J].International Journal of Space Structures.2000,15(2):81-94.
[2] 沈世钊,支旭东. 球面网壳结构在强震下的失效机理[J]. 土木工程学报,2005,01:11-20.
Shen Shizhao,Zhi Xudong. Failure mechanism of reticular shells subjected to dynamic actions[J].China civil engineering Journal,2005,01:11-20 (in Chinese).
[3] 聂桂波.网壳结构构件空间滞回性能试验与精细化本构模型研究[D].哈尔滨工业大学,2008.
Nie Guibo. Research on spatial hysteretic experiment and constitutive equation for element of reticulated shells[D]. Harbin Institute of Technology,2008(in Chinese) .
[4] 杜文风,高博青,董石麟. 单层球面网壳结构动力强度破坏的双控准则[J]. 浙江大学学报(工学版),2007,11:
1916-1920+1926.
Du Wenfeng, Gao Boqing, Dong Shilin. Double-control criterion of dynamical strength failure for single layer latticed shells[J].Journal of Zhejiang university
(Engineering science),2007,11:1916-1920+1926(in Chinese).
[5] 张其林,Udo Peil. 任意激励下弹性结构的稳定分析[J].土木工程学报,1998,31(1):26-32.
Zhang Qilin,Udo Peil. Stability analysis of elastics structures under arbitrary excitation [J].China Civil Engineering Journal. 1998,31(1):26-32(in Chinese).
[6] 聂桂波,范峰,支旭东,戴君武.单层球面网壳结构失效机理振动台试验[J]. 土木工程学报,2013,46(10): 17-25.
Nie Guibo,Fan Feng,Zhi Xudong,Dai Junwu. Shaking table test on failure mechanism of single-layer reticulated dome [J]. China Civil Engineering Journal,2013,46(10):
17-25(in Chinese) .
[7] 李忠学,沈祖炎,邓长根,曹文清,卢文胜. 钢网壳模型的动力稳定性振动台试验研究[J]. 实验力学,1999,14(4):
484-491.
Li Zhongxue,Shen Zuyan,Deng Changgen Research on the Dynamic Stability of Steel Reticulated Shells via Shaking Table Test[J].Journal of experimental mechanics.
1999.14(4):484-491(in Chinese).
[8] 范峰,支旭东,沈世钊.网壳结构强震失效机理[M].北京:科学出版社,2014:79-104.
Fan Feng,Zhi Xudong,Shen Shizhao. Failure mechanism of reticulated shells under earthquake [M]. Science Press.2014:79-104.
[9] 王秀丽,马晓彤.BRB在受损单层网壳结构抗震加固中的应用于研究[J].工程抗震与加造.2013,35(6):111-117.
Wang Xiuliu,Ma Xiaotong.Application and Research of BRB in Seismic strengthening of Damage single Layer Reticulated Shells[J].Earthquake Resistant Engineering and Retrofitting.2013,35(6):111-117.
[10] 叶继红,潘锐.单层球壳模型结构振动台试验研究[J].建筑结构学报,2013,34(4):81-90.
Ye Jihong,Pan Rui. Shaking table test on collapse process of single-layer spherical shells[J].Journal of Building Structures. 2013,34(4):81-90(in Chinese).
[11] 聂桂波,范峰,支旭东,戴君武.单层球面网壳模型动力特性测试实验[J].振动与冲击,2013,32(22):200-204.
Nie Guibo,Fan Feng,Zhi Xudong,Dai Junwu.Dynamic characteristics test of a single-layer reticulated dome model[J]. Journal of Vibration and Shock, 2013,32(22):200-204(in Chinese).
[12] 巴盼锋,张毅刚,吴金志.基于单元纤维的空间杆件损伤演化计算[C]//杜修力.2013年全国土木工程研究生学术论坛论文集.北京:北京工业大学出版社,2013:298-302.
Ba Panfeng, Zhang Yigang, Wu Jinzhi. The Subroutine Research of Spatial Bar Based on Damage Evolution[C]// The 2013 National Civil Engineering Graduate Students Academic Conference Proceedings,2013:298-302(in Chinese) .
[13] 张毅刚,巴盼锋,吴金志,张薇敬.基于失效的单层球面网壳损伤演化及承载力分析[J].天津大学学报(自然科学与工程技术版),2014,47(增刊7)74-78.
Zhang Yigang,Ba Panfeng,Wu Jinzhi,Zhang Weijin Damage Evolution and bearing Capacity analysis of single layer Spherical Shell Based on Aging[J].Journal of Tianjin University(Science and Technology),2014,47(Suppl 7)74-78(in Chinese).
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