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1.华东交通大学交通基础设施安全江西省重点实验室, 江西 南昌 330013
2.华东交通大学土木建筑学院, 江西 南昌 330013
3.赤峰学院资源环境与建筑工程学院, 内蒙古 赤峰 024000
Received:18 December 2023,
Revised:2024-04-01,
Published:15 December 2024
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许紫刚,郑养宁,庄海洋等.基于不同分析方法的设置分体柱地铁车站结构抗震性能研究[J].防灾减灾工程学报,2024,44(06):1359-1367.
XU Zigang,ZHENG Yangning,ZHUANG Haiyang,et al.Study on the Seismic Performance of Subway Station Structures with Split Columns Based on Different Analysis Methods[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1359-1367.
许紫刚,郑养宁,庄海洋等.基于不同分析方法的设置分体柱地铁车站结构抗震性能研究[J].防灾减灾工程学报,2024,44(06):1359-1367. DOI: 10.13409/j.cnki.jdpme.20231218004.
XU Zigang,ZHENG Yangning,ZHUANG Haiyang,et al.Study on the Seismic Performance of Subway Station Structures with Split Columns Based on Different Analysis Methods[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1359-1367. DOI: 10.13409/j.cnki.jdpme.20231218004.
在水平和竖向双向地震作用下,浅埋地铁车站结构中柱易出现轴压比大、水平变形能力不足等特点。钢筋混凝土分体柱因其在高轴压作用下仍具有较好的延性性能,不仅在地面高层建筑结构中得到广泛的应用,也逐渐在地下车站结构减震设计中受到关注。采用科学合理的数值模型和分析方法对设置分体柱地铁车站结构进行抗震性能评价是其中一个关键问题。本研究以某设置分体柱的单层双跨地铁车站结构为例,分别建立了动力时程分析方法、反应加速度法和Pushover分析方法的三维和二维有限元分析模型,通过层间位移角评价了该设置分体柱地铁车站结构的抗震性能,并对比了不同分析方法在计算中柱变形和关键截面内力等方面的计算精度。结果表明:采用不同分析方法所计算的车站结构在不同地震作用下层间位移角远小于现行规范中1/550的规定,满足工程设计要求;折减分体柱中单元柱的弹性模量和密度、单元柱之间的摩擦系数保持不变,是建立带分体柱地铁车站结构二维分析模型的有效方法;综合考虑计算成本与计算效率,二维Pushover分析方法可获得与三维动力时程分析方法相近的计算结果,推荐在工程设计中使用。
The central columns in shallow buried subway station structures are prone to high axial compression ratios and insufficient horizontal deformation capacity when subjected to horizontal and vertical seismic loads. Due to their good ductility under high axial compression
reinforced concrete split columns are widely used in high-rise building structures and are also gaining attention in the seismic design of underground station structures. The use of scientific and reasonable numerical models and analysis methods to evaluate the seismic performance of subway station structures with split columns has become one of the key issues. This study used a single-story double-span subway station structure with split columns as an example and established three-dimensional (3D) and two-dimensional (2D) finite element analysis models using dynamic time-history analysis method
response acceleration method
and Pushover analysis method. The seismic performance was evaluated through inter-story drift angles
and the calculation precision of different analysis methods in calculating column deformation and key section internal forces was compared. The results showed that the inter-story drift angle of the station structure was much smaller than the current criterion of 1/550 when using different analysis methods under different earthquake loads
which met the engineering design requirements; Reducing the elastic modulus and density of the unit columns in the split columns
or keeping the friction coefficient between the unit columns unchanged
was an effective method for establishing a 2D analysis model of subway station structures with split columns. Taking into account both computational cost and efficiency
the 2D Pushover analysis method can obtain similar calculation results to the 3D dynamic time-history analysis method
and is recommended for use in engineering design.
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