刚性挡土墙地震失效模式的数值研究

英文篇名：DISCRETE ELEMENT STUDY ON THE FAILURE MODE OF RIGID GRAVITY RETAINING WALL
中文刊名：低温建筑技术
英文刊名：Low Temperature Architecture Technology
作者：邹德高 ; 骆巍 ; 张争超
英文作者：ZOU De-gao1 ; 2 ; LUO Wei1 ; ZHANG Zheng-chao1(1.State Key Laboratory of Coastal and Offshore ; Dalian University of Technology ; Lianning Dalian 116024 China ; 2.School of Hydraulic Engineering ; Dalian University of Technology ; Liaoning Dalian 116024 ; China)
中文关键词：刚性重力式挡土墙 ; 地震失效模式 ; 离散元
英文关键词：rigid gravity retaining wall ; seismic failure mode ; discrete element method
出版日期：2012-10-28
机构：大连理工大学海岸和近海工程国家重点实验室;大连理工大学水利工程学院;
年：2012
期：10
出版单位：低温建筑技术

摘要

采用离散元方法建立了某刚性重力式挡土墙的数值模型,并根据室内材料试验结果标定了数值模型的微观参数,使数值模拟结果建立在可靠的参数选择基础上。利用颗粒流软件的微观实时测量优势研究了地震荷载作用下挡土墙的失效模式。研究结果表明:加载初期,挡土墙在墙后动土压力、自身地震惯性力和基础摩擦力的作用下保持稳定;随着加速度峰值的增大,动土压力的波动偏离静土压力并逐渐增大,挡土墙发生水平滑移和旋转,当基础破坏后挡土墙还将发生竖向位移。
In this paper,a numerical model of rigid gravity retaining wall was created by discrete element method,and microscopic parameters of the numerical model were adjusted according to indoor material test.The seismic failure mode of the rigid gravity retaining wall was studied use real-time measuring advantage of the software.The results show that retaining wall remain stable due to active earth pressure、seismic inertial force and frictional force at the early stage of loading.With the increase of peak acceleration,the horizontal active earth pressure increase gradually so that the retaining wall produced the horizontal displacement sliding along with rotation,and the retaining wall produced the vertical displacement after the foundation damaged.

引文

[1]邱燕玲,姚令侃,秦伟.汶川地震路基挡墙震害特征分析[J].重庆交通大学学报(自然科学版),2010,29(4):576-581.
    [2]Sherif M A,Fang Y S.Dynamic earth pressures on rigid walls ro-tating about the base[C]//Proceedings of the 8th World Confer-ence on Earthquake Engineering.San Francisco,1984:993-1000.
    [3]王磊.防波堤动力模型试验研究[D].大连:大连理工大学,2007.
    [4]Choudhury D,Nimbalkar,S.Determination of point of applicationof seismic active thrust on retaining wall[C]//Proceedings of the4th Int.Conf.on Earthquake Geotechnical Engineering(4ICEGE-2007)(CD-ROM),Thessaloniki,Greece,paper No.1249.2007.
    [5]Cundall P A.A computer model for simulating progressive largescale movements in blocky systems[C]//Proceedings of the theSymposium of the International Society of Rock Mechanics,Nan-cy,France,1971,Paper No.Ⅱ-8.
    [6]王泳嘉,邢纪波.离散单元法及其在岩土力学中的应用[M].沈阳:东北工业学院出版社,1991.
    [7]Cundall P A.PFC user manual[M].Minneapolis:Itasca Con-sulting Group Inc.,2004.