Experimental study on the dynamic effects in progressive collapse of beam-column concrete substructures

被引：0
|
作者：
Xiao Y.-Z. [1 ]
Li Y. [1 ]
Lu X.-Z. [2 ]
Ren P.-Q. [3 ]
He H.-X. [1 ]
机构：
[1] Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing
[2] Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education, Tsinghua University, Beijing
[3] China Institute of Building Standard Design & Research, Beijing
来源：
Gongcheng Lixue/Engineering Mechanics | 2019年 / 36卷 / 05期
关键词：
Beam-column substructure; Collapse resistance; Dynamic effect; Progressive collapse; Reinforced concrete structure;
D O I：
10.6052/j.issn.1000-4750.2018.04.0189
中图分类号：
学科分类号：
摘要：
Progressive collapse is a nonlinear dynamic behavior of structure systems. The key issue in establishing the simplified method for the practical engineering design is to evaluate the dynamic effect accurately. To investigate the dynamic progressive collapse mechanism and the dynamic effect of reinforced concrete substructures, one static and four dynamic experiments were conducted on four specimens, which had the identical dimensions and material properties. The results indicated that the stress concentration and asymmetric deformation in the dynamic tests were severer than those in the static test due to the high strain rate effect. Thus, the cracks developed intensively at the beam ends and the concrete spalling area caused by compression was relatively small in dynamic tests. The general dynamic resistance, in which the effects of dynamic damage and high strain rate to the structural resistance were inherently considered, was able to accurately predict the resistance demand in the real progressive collapse process. In addition, the dynamic amplification effect was enhanced by the effect of dynamic damage and high strain rate, thus the practical dynamic amplification factors were larger than the predicted values of the conventional theory. © 2019, Engineering Mechanics Press. All right reserved.
引用
收藏
页码：44 / 52
页数：8
相关论文
共 23 条
  • [1] ASCE/SEI 7-10, Minimum design loads for buildings and other structures, (2010)
  • [2] Guo Y., Yu J., Dynamic structural response of progressive collapse under a single-column-removal scenario, Engineering Mechanics, 34, 4, pp. 72-77, (2017)
  • [3] Yu Y., Tan C., Jin L., Et al., Research on seismic progressive collapse of single-layer reticulated dome using the finite particle method, Engineering Mechanics, 33, 5, pp. 134-141, (2016)
  • [4] Meng B., Zhong W., Hao J., Experimental study on anti-collapse performance for beam-column assemblies with bolt and weld rigid connection based on different span ratio, Engineering Mechanics, 35, 1, pp. 79-87, (2018)
  • [5] Pan Y., Chen X., Yao Y., Et al., Progressive collapse analysis of unbonded post-tensioned precast RC frame structures using column removal method, Engineering Mechanics, 34, 12, pp. 162-170, (2017)
  • [6] Peng Z., Orton L.S., Liu J., Et al., Experimental study of dynamic progressive collapse in flat-plate buildings subjected to an interior column removal, Journal of Structural Engineering, 144, 8, (2018)
  • [7] Gao S., Xu M., Zhang S., Dynamic analysis of concrete-filled steel tube composite frame against progressive collapse based on benchmark model, Advances in Structural Engineering, 21, 7, pp. 1021-1035, (2018)
  • [8] Ma K., Xu Y., Li W., Dynamic response analysis of steel frame with a sudden removal first floor column, Journal of Intelligent and Fuzzy Systems, 34, 2, pp. 1133-1140, (2018)
  • [9] Gao J., Liu B., Huang H., Et al., Theoretical analysis on the progressive collapse of RC frame structures with slabs, Engineering Mechanics, 35, 7, pp. 117-126, (2018)
  • [10] Zhou Y., Chen T., Hu X., Et al., Progressive collapse resistance of RC frame structures considering surrounding structural constraints, Engineering Mechanics, 36, 1, pp. 216-226, (2018)
123