摘要
为寻求较合适的地裂缝场地土体动力本构关系模型,以便准确研究普通场地和地裂缝场地在不同土层分布情况下的动力响应规律,以西安f_(4)地裂缝场地为背景,设计完成地裂缝场地土体振动台试验。同时,以二次开发所得的等效线性化模型、边界面模型和ABAQUS自有的摩尔-库伦模型为对象,分别建立数值分析模型,并将计算结果与试验结果进行对比。最后,以边界面模型为材料本构,进行6种工况的地裂缝场地与普通场地的ABAQUS数值分析,找到不同土层分布地裂缝场地对土体动力响应的影响规律。结果表明:在高地震强度下,土体发生较大塑性变形,边界面模型是较合适的地裂缝场地土体动力本构模型。普通场地和地裂缝场地均对地震波有放大效应,但不同的土层分布形式的场地放大效果不同;地裂缝场地均表现出加速度放大效应和形似“八”的上下盘效应,其上盘影响最大值为11 m,下盘的最大值为9 m。该研究成果为地裂缝环境工程结构的抗震设计及工程应用提供参考。
To find a more suitable soil dynamic constitutive relationship model for ground fissure sites so as to accurately study the dynamic response law of different distributions of soil layers in common sites and ground fissure sites,the soil shaking table test for ground fissure sites was designed and completed with the f_(4)ground fissure site in Xi′an as an example.Then,the secondary developed equivalent linearization model,boundary surface model,and Mohr-Coulomb model were established,and numerical analysis models were compared with experimental results.Finally,ABAQUS numerical analysis was carried out on ground fissure sites and normal sites under six working conditions with the boundary surface model as the constitutive structure,and the influence of ground fissure sites distributed in different soil layers on the dynamic response of soil was explored.Results show that the soil had a large plastic deformation under high earthquake intensities,and the boundary surface model was a suitable dynamic constitutive model for soil in ground fissure sites.The seismic waves could be amplified in common sites and ground fissure sites,but the effects were different under different working conditions.The ground fissure sites all showed acceleration amplification effect,and the upper and lower wall effect was similar to the shape of“八”.The maximum influence range of the upper wall was 11 m,and the maximum value of the lower wall was 9 m.The research results can provide reference for the seismic design and engineering application of engineering structures under the ground fissure environment.
作者
熊仲明
许健健
张振鹏
张童贵
XIONG Zhongming;XU Jianjian;ZHANG Zhenpeng;ZHANG Tonggui(Key Lab of Structural Engineering and Earthquake Resistance(Xi′an University of Architecture and Technology),Ministry of Education,Xi′an 710055,China;School of Civil Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China;Shenzhen General Institute of Architectural Design and Research Co.,Ltd.,Shenzhen 518032,Guangdong,China)
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2021年第11期101-109,共9页
Journal of Harbin Institute of Technology
基金
陕西省自然科学基础计划重点项目(2018JZ5008)
住房与城市建设部自然基金(2019-k-044)
大学生创新创业训练计划项目(S201910703035)。
关键词
地裂缝场地
ABAQUS二次开发
振动台试验
土体动力本构
ground fissure site
ABAQUS secondary development
shaking table test
soil dynamic constitutive model
