摘要
为分析具有自复位功能的部分填充钢管混凝土桥墩在水平往复荷载下的力学性能,针对该类型桥墩进行了理论研究,并以桥墩钢管壁厚、预应力比和钢绞线张拉度为设计参数建立有限元模型,在恒定轴力与水平往复荷载作用下开展了弹塑性分析。结果表明:桥墩壁厚和预应力比影响桥墩的水平承载力,适当降低张拉度可提高桥墩结构的安全富裕度。因此,在工程实践中可通过合理地选取桥墩壁厚、预应力比和张拉度,以达到承载力和抗震性能的最优组合,该理论分析方法可为工程实践提供参考。
In order to analyze the mechanical properties of partially-filled concrete filled steel tubular piers with self-resetting function under the horizontal reciprocating load, the theoretical research is carried out for this type of pier, and the finite element model is established with the pier steel tube wall thickness, prestress ratio and steel strand tension as the design parameters, and the elastoplastic analysis is carried out under the constant axial force and horizontal reciprocating load. The results show that: the pier wall thickness and prestress ratio affect the horizontal bearing capacity of the pier, and the safety margin of the pier structure can be improved by properly reducing the tensioning degree. Therefore, the optimal combination of bearing capacity and seismic performance can be achieved by reasonably selecting the pier wall thickness, prestress ratio and tensioning degreein the engineering practice. The theoretical analysis method can provide reference for the engineering practice.
作者
王占飞
李梦琦
杨帆
于丰纶
Wang Zhanfei;Li Mengqi;Yang Fan;Yu Fenglun(School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China;CCCC Comprehensive Planning and Design Institute Co.,Ltd.,Beijing 100024,China)
出处
《北方交通》
2023年第2期1-4,10,共5页
Northern Communications
关键词
自复位
部分填充钢管混凝土桥墩
有限元分析
力学性能
Self-resetting
Partially-filled concrete filled steel tubular piers
Finite element analysis
Mechanical properties
