期刊
BULLETIN OF EARTHQUAKE ENGINEERING
卷 17, 期 11, 页码 6141-6163出版社
SPRINGER
DOI: 10.1007/s10518-019-00714-0
关键词
Seismic performance; Segmental columns; Monolithic columns; Cyclic loading tests; Parametric analysis
资金
- National Natural Science Foundation of China [51508276, 51838004]
- Australian Research Council through its Discovery Early Career Researcher Award [DE150101703]
This paper investigates the seismic performance of posttensioned concrete bridge columns combining cast-in-place and precast segments to achieve optimal response to cyclic loadings and construction. For this purpose, a monolithic bridge column (MBC), a hybrid bridge column with a combination of precast segments and a cast-in-place column base (HBC), and a precast segmental bridge column (PSBC) were designed and built. The three columns were subjected to cyclic loading to assess the seismic capacity. Experimental data showed the HBC to have better performance regarding hysteretic characteristics, energy dissipation, and stiffness degradation compared to the PSBC. The HBC and PSBC both exhibited significantly higher self-resetting capacity than the MBC. The corresponding numerical simulations were conducted based on OpenSees platform, and the results were compared with the test data. Using the validated numerical model, further parametric analyses were carried out to assess the energy dissipation capacity of the HBCs. This was found to increase with the height-to-diameter ratio of the cast-in-place column base until a certain threshold. A reasonable height-to-diameter ratio of the cast-in-place region with different axial compression and longitudinal reinforcing ratios could be defined for improving the energy dissipation capacity in seismic design of the proposed HBCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据