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广西科技大学土木建筑工程学院,广西 柳州 545006
Received:19 March 2019,
Revised:2019-08-26,
Published:16 June 2021
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张鹏,孙仁中,邓宇等.型钢混凝土受拉柱恢复力计算模型试验研究[J].防灾减灾工程学报,2021,41(03):549-557.
ZHANG Peng,SUN Renzhong,DENG Yu,et al.Resilience Models of Steel⁃reinforced Concrete Tension Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):549-557.
张鹏,孙仁中,邓宇等.型钢混凝土受拉柱恢复力计算模型试验研究[J].防灾减灾工程学报,2021,41(03):549-557. DOI: 10.13409/j.cnki.jdpme.201903038.
ZHANG Peng,SUN Renzhong,DENG Yu,et al.Resilience Models of Steel⁃reinforced Concrete Tension Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):549-557. DOI: 10.13409/j.cnki.jdpme.201903038.
为研究型钢混凝土构件在偏心受拉作用下的抗震性能,以剪跨比、轴拉比以及偏心距为主要设计参数,对7根型钢混凝土受拉柱进行了低周反复试验中观察了试件的受力过程和破坏形态,得到滞回曲线以及骨架曲线等。通过理论推导和回归分析,提出了各特征点的计算公式。在此基础上,结合受拉柱的滞回特性,给出卸载刚度计算公式以及相应的滞回规则,并建立了型钢混凝土受拉柱四折线恢复力模型。结果表明:通过试验骨架曲线和计算骨架曲线的对比,二者结果吻合较好,能够较为全面地反映构件的受力性能,建议的四折线恢复力模型较为合理,可用于型钢混凝土受拉柱抗震性能的评估。
To study the seismic performance of steel-reinforced concrete tension columns, low reversed cyclic loading tests were carried out on 7 specimens. The shear-span ratio, axial load ratio, and eccentricity were set as design parameters. The failure process and pattern were observed during the tests. The load-displacement curve and the skeleton curves were obtained. The equations to calculate these characteristic points were proposed through theoretical derivation and data regression analyses. On this basis, combined with the hysteretic characteristics of tension columns, the calculation formula of the unloading stiffness and the corresponding hysteretic rules are given, and the four-fold restoring force model of the steel-reinforced concrete tension column is established. The results show that, through the comparison between experimental and calculated results of skeleton curves, the two results are in good agreement, which can comprehensively reflect the mechanical performance of members. The proposed four-fold restoring force model is reasonable and can be used to evaluate the seismic performance of steel-reinforced concrete tension columns.
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Code for design of composite structures : JGJ138—2016 [S]. Beijing : China Architecture & Building Press , 2016 (in Chinese)
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