首页|不同面板型式加筋土挡墙振动响应数值分析

不同面板型式加筋土挡墙振动响应数值分析

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以刚/柔组合墙面加筋土挡墙的振动台试验结果为基准,建立刚/柔组合式、模块加返包式、模块式和格宾式面板型式加筋土挡墙的FLAC3D数值模型,研究面板型式对挡墙水平位移、加速度响应及地震土压力分布的影响.结果表明:在静力作用下不同面板型式挡墙的变形模式略有不同;振动作用下,变形大小为组合式<模块加返包式<格宾式<模块式;加筋区内加速度放大系数为组合式>模块加返包式>格宾式>模块式;面板处加速度放大系数均大于加筋区,且面板型式不同,放大规律亦不同;面板型式不同,地震主动土压力非线性分布规律不同;合力作用点位置大多高于M-O方法的H/3,且受加速度幅值影响较小.
Numerical simulation of the vibration responses of reinforced soil-retaining walls with different facings
Based on the shaking table test results of a reinforced soil-retaining wall with rigid/flexible facings,FLAC3D numerical models of reinforced soil-retaining walls with rigid/flexible facings,modular facing embedded return package structure,modular facing,and gabion facing were established,and the influence of different facings on the horizontal displacement,acceleration response,and seismic earth pressure distribution of the retaining wall was analyzed.The results show that the deformation modes of the retaining walls with different facings slightly differ under static loading.Under the action of vibra-tion,the magnitude of facing deformation is rigid/flexible facing<modular facing embedded return package structure<gabion facing<modular facing.The acceleration amplification factor in the rein-forced zone is rigid/flexible facing>modular facing embedded return package structure>gabion facing>modular facing.The acceleration amplification factor is greater at the facing than in the reinforced zone.The acceleration amplification laws and the nonlinear distribution laws of seismic active earth pres-sure differ among the facings.The position of the resultant force action point is mostly higher than H/3 of the M-O method,and it is less affected by the acceleration amplitude.

reinforced soil retaining wallfacingsnumerical simulationhorizontal displacementacceleration responseseismic earth pressure

李思汉、蔡晓光、王学鹏、徐洪路、黄鑫

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防灾科技学院地质工程学院,河北三河 065201

河北省地震灾害防御与风险评价重点实验室,河北三河 065201

廊坊市加筋土结构研发与应用重点实验室,河北 三河 065201

中国地震灾害防御中心,北京 100029

河北省地矿局第六地质大队,河北石家庄 050085

中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨 150080

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加筋土挡墙 面板型式 数值模拟 水平位移 加速度响应 地震土压力

河北省高等学校科学研究计划廊坊市科学技术研究与发展计划廊坊市科学技术研究与发展计划地震科技星火计划江苏省地质工程环境智能监控工程研究中心开放基金中央高校基本科研业务费专项

BJK202403420230132052021013172XH23067YA2023-ZNJKJJ-06ZY20220208

2024

地震工程学报
中国地震局兰州地震研究所,中国地震学会,清华大学,中国土木工程学会

地震工程学报

CSTPCD北大核心
影响因子:1.191
ISSN:1000-0844
年,卷(期):2024.46(1)
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