Tests for seismic performance and calculation for lateral stiffness of fully recycled aggregate concrete filled steel tubular frames with different column section sizes
MENG Ercong1, YU Yalin1, ZHANG Xianggang2, SU Yisheng3
1. College of Engineering Technology, Southwest University, Chongqing 400715, China;
2. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
3. School of Civil and Architectural Engineering, Guangxi University, Nanning 530004, China
Abstract:Here, to explore seismic performance of recycled aggregate concrete filled steel tubular frames with different lateral stiffness, the low-cycle repeated loading tests of two recycled concrete filled steel tubular frames with different column section sizes were conducted to observe failure process and morphology of specimens and obtain their seismic performance indexes. The results showed that hysteretic curve of a recycled aggregate concrete filled steel tubular frame is full, when it reaches peak value and failure point, its equivalent viscous damping coefficient he is significantly larger than those of reinforced concrete (RC) and recycled RC frame, it has good elastic-plastic energy dissipation performance; with increase in column section size, load-bearing capacity, energy dissipation performance and lateral stiffness of specimens have upward trend; with increase in column section size, shear strength of specimens increases; with increase in loading displacement, specimen damage degree increases gradually, and damage degree in the positive direction is larger than that in the negative direction; when loading in the positive direction, the specimen’s damage index d increases with increase in column section size, when loading in the negative direction, the specimen’s damage index d decreases with increase in column section size; the calculation results of specimen lateral stiffness based on the D-value method calculation model and different regulations are compared with test ones, they are basically consistent; the lateral stiffness of recycled aggregate concrete-filled steel tubular frame under cracking load can be calculated based on D-value method and according to the regulation CECS.
孟二从1,余亚琳1,张向冈2,苏益声3. 不同柱截面尺寸全再生钢管混凝土框架抗震性能试验及抗侧刚度计算[J]. 振动与冲击, 2021, 40(13): 255-262.
MENG Ercong1, YU Yalin1, ZHANG Xianggang2, SU Yisheng3. Tests for seismic performance and calculation for lateral stiffness of fully recycled aggregate concrete filled steel tubular frames with different column section sizes. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(13): 255-262.
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