长安大学 土木工程与智能建造学院,陕西 西安 710061
权登州(1983―), 男, 讲师, 博士. 研究方向:地下结构抗震及岩土工程防灾减灾. E-mail: qdz0809@chd.edu.cn.
卜永红, 教授, E-mail: byh956@126.com.
收稿:2026-03-24,
修回:2026-07-28,
网络首发:2026-07-31,
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权登州,卜永红,范智双等.黄土地区地铁地下车站韧性防震机理研究[J].工程科学与技术,
QUAN Dengzhou,BU Yonghong,FAN Zhishuang,et al.Research on Resilience Seismic Mechanism of Underground Station in Loess Site[J].Advanced Engineering Sciences,
权登州,卜永红,范智双等.黄土地区地铁地下车站韧性防震机理研究[J].工程科学与技术, DOI:10.12454/j.jsuese.202600211.
QUAN Dengzhou,BU Yonghong,FAN Zhishuang,et al.Research on Resilience Seismic Mechanism of Underground Station in Loess Site[J].Advanced Engineering Sciences, DOI:10.12454/j.jsuese.202600211.XXXX,XX(XX):1‒13.
为提高黄土地区地下结构抗震韧性,提出一种融合“自复位中柱”与“变形恢复区”的多元复合韧性防震体系。通过正交试验与模糊数学理论建立了地下车站韧性防震综合评价指标
E
FCE
,基于室内试验获取变形恢复区改性土体关键力学性能参数,采用数值模拟方法深入研究变形恢复区宽度、橡胶掺量、加筋带间距以及地下车站柱型组合对多元复合体系综合指标
E
FCE
的影响规律;通过输入不同特征地震波,系统分析多元复合体系各子系统的协同作用机理及贡献度。结果表明:变形恢复区橡胶掺量对地下车站韧性防震性能影响最为显著,其次为变形恢复区宽度和地下车站柱型组合,而变形恢复区加筋带间距影响最小;当变形恢复区宽度取2.5 m、橡胶掺量取5%、加筋带间距取0.1 m,并采用顶、底层均设自复位中柱组合方案时,多元复合体系韧性防震性能最佳;在中等强度和低频成分丰富的地震波作用下,多元复合体系更易表现出正向协同效应;在各子系统中,变形恢复区对地下车站韧性防震能力的提升始终呈现较高比例的正向贡献,而自复位中柱及协同效应在多数情况下的贡献度相对较小,且受地震波特性的影响较大。本研究可为黄土地区地下结构的韧性抗震设计与研究提供重要参考。
Objective Enhancing the seismic resilience of underground structures is one of the core research priorities in the field of seismic performance for underground engineering. Existing studies on seismic mitigation measures for underground structures are largely confined to the single dimension of either structural optimization or surrounding rock improvement
yielding very limited gains in seismic resilience
whereas r
esearch on resilient seismic mitigation systems incorporating the synergistic interaction between structures and surrounding rocks remains relatively scarce. To improve the seismic resilience of underground structures in loess regions
this paper takes a metro underground station project in the loess area of Xi'an as the research background
and proposes a multi-component composite resilient seismic mitigation system for underground structures
which integrates self-centering middle columns and deformation recovery zones.Methods First
dynamic characteristic tests on rubber particle-modified loess were conducted using a GDS dynamic triaxial test system to obtain the required key dynamic mechanical parameters
and the modified Davidenkov dynamic constitutive model was employed to characterize its dynamic stress-strain relationship. Second
calculation cases were determined via the orthogonal experimental design method
and a two-dimensional finite element model for the dynamic interaction between the loess site and the multi-component composite system was established on the ABAQUS finite element platform. By introducing fuzzy mathematics theory
the multi-indicator evaluation problem was converted into a single comprehensive evaluation problem
and a comprehensive evaluation index for resilient seismic capacity (
E
FCE
) was constructed. Range analysis and analysis of variance (ANOVA) were performed on the orthogonal test simulation results to investigate the influence patterns and significance levels of variations in each design parameter of the multi-component composite system on
E
FCE
. Furthermore
the optimal parameter combination was identified based on the analysis results
and its reliability was verified by comparing
E
FCE
values
cloud diagrams of structural damage and deformation
and horizontal displacement time-history curves under different parameter schemes. Finally
seismic waves with varying intensities and spectral char
acteristics were input to analyze the influence of ground motion properties on the synergistic effect of the multi-component composite system
and the synergistic mechanism of the system was revealed by quantifying the contribution of each sub-technology and the synergistic effect to the overall system performance.Results and Discussions The range analysis and ANOVA results reveal that the rubber content in the deformation recovery zone is the most significant factor governing the seismic resilience of the underground station
followed by the width of the deformation recovery zone and the station's column type combination
while the reinforcement spacing of the deformation recovery zone exerts the least pronounced effect. The
E
FCE
calculations derived from the fuzzy mathematics evaluation framework indicate that the multi-component composite system attains optimal seismic resilience when the deformation recovery zone has a width of 2.5 m
a rubber content of 5%
and a reinforcement strip spacing of 0.1 m
with self-centering middle columns installed on both the top and bottom floors of the station. The
E
FCE
value of the optimal parameter combination is universally superior to those of other schemes. Compared with conventional underground stations
the station equipped with the optimized multi-component composite system exhibits effectively mitigated structural damage
reduced residual deformation
and suppressed horizontal displacement response under seismic excitation
corroborating the efficacy of the proposed optimal design. The synergistic effect of the multi-component composite system exhibits clear patterns: under moderate-intensity earthquakes
all subsystems of multi-component composite system are more prone to present a positive synergistic effect
meaning the combined performance of all sub-technologies outperforms the sum of their individual effects. Seismic waves abundant in low-frequency components also favor the emergence of positive synergy
w
hich gradually diminishes as the proportion of medium-frequency and high-frequency components increases. In the multi-component composite system
the deformation recovery zone consistently makes a dominant positive contribution under seismic actions
with its contribution rates to seismic performance and post-earthquake recovery capacity reaching no less than 70% and 60%
respectively. In contrast
the contributions of self-centering middle columns and the synergistic effect show pronounced volatility and complexity
and in most scenarios
both account for relatively small proportions of the performance improvement.Conclusions The results demonstrate that the proposed multi-component composite system effectively improves the seismic performance and post-earthquake recovery capacity of underground stations
thereby enhancing the overall seismic resilience of the structure. The parameter combination of MCS optimized via the
E
FCE
index outperforms all alternative configurations in resilient seismic capacity and exhibits favorable reliability. The performance gains of the MCS are primarily attributable to the deformation recovery zone technology at the surrounding rock level
whereas the contributions of the self-centering middle column technology at the structural level and the cross-level synergistic effect are relatively limited. These findings can provide theoretical reference and technical support for the resilient seismic design of underground structures in loess regions.
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