采用不同新型功能柱的地下车站结构抗震性能对比研究  

Comparative study on seismic performance of underground station structure with different new functional columns

作　　者：杜修力[1] 潘颖超 赵密[1] 黄景琦 Du Xiu-li;Pan Ying-chao;Zhao Mi;Huang Jing-qi(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;Beijing Key Laboratory of Urban Underground Space Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京科技大学城市地下空间工程北京市重点实验室,北京100083

出　　处：《工程抗震与加固改造》2023年第3期91-101,共11页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金联合基金项目(U1839201)。

摘　　要：基于高轴压比下中柱侧向变形能力不足导致含内柱框架式地铁车站结构地震破坏的机理认识,部分研究者在保证中柱竖向承载力不变的前提下,提出了分体柱、叠层夹芯柱、截断柱等几种新型功能柱以提高中柱侧向变形能力,进而提高车站结构抗震性能。当前对新型功能柱在地震作用下的力学行为已开展了大量研究,但对不同柱体形式对车站结构整体抗震性能提升效果并未开展系统评价,且缺乏直接对比研究。首先,针对某单层双跨地铁车站结构建立整体三维非线性数值分析模型,开展不同地震波及不同地震强度下传统方柱、分体柱、叠层夹芯柱、截断柱等4种中柱形式下的地震响应计算,从车站层间变形、整体损伤及关键构件内力响应等方面对新型功能柱的减震效果进行对比评价。研究结果表明:在降低车站结构混凝土损伤方面,截断柱效果最佳,叠层夹芯柱次之,分体柱最弱;3种新型功能柱在提高结构中柱延性方面,叠层夹芯柱效果最佳,截断柱次之,分体柱最弱;在降低结构中柱内力响应方面,叠层夹芯柱最佳,分体柱次之,截断柱最弱。相关研究结果可为含内柱框架式地铁车站结构减震设计提供理论指导。Based on the fact that the lateral deformation ability of the middle column is insufficient under high axial compression ratio,and the understanding of the seismic failure mechanism of the underground station frame structure with inner columns,under the condition that the vertical bearing capacity of the columns remain unchanged,some researchers suggested several new types of functional columns,such as split column,segment cored column and truncated column,to improve the lateral deformation capacity of the columns in the structure,and then improve the seismic performance of the station structure.Currently,a lot of studies have been carried out on the mechanical behavior of new functional columns under earthquake,but there is no systematic evaluation on the effectiveness of different column forms on the overall seismic performance of station structures,and there is a lack of direct comparative research.First of all,an integral three-dimensional nonlinear numerical analysis model is established for a single-story and double-span underground station structure;the seismic response calculation of traditional square column,split column,laminated sandwich column and truncated column under different earthquake intensity is carried out,and the damping effect of the new functional column is compared and evaluated from the aspects of interlayer deformation,integral damage and internal force response of key members.Researches show that,in terms of reducing the concrete damage of underground station structure,the truncated column is the best,the segment cored column is the second,and the split column is the weakest.In the aspect of improving the ductility of the three new functional columns,the segment cored column is the best,the truncated column is the second,and the split column is the weakest.For reducing the internal force response of the column in the structure,the segment cored column is the best,the split column is the second,and the truncated column is the weakest.The relevant research results could provide theoretic

关 键 词：地铁车站结构 新型功能柱 抗震性能 地震响应 数值分析 

分 类 号：TU375.4[建筑科学—结构工程]