铁道科学与工程学报
鐵道科學與工程學報
철도과학여공정학보
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
2015年
4期
778-783
,共6页
加筋土边坡%地震作用%动力反应%数值分析%时程分析
加觔土邊坡%地震作用%動力反應%數值分析%時程分析
가근토변파%지진작용%동력반응%수치분석%시정분석
reinforced slope%seismic action%dynamic response%numerical analysis%time -history analysis
采用有限差分法，建立土工合成材料加筋边坡的动力数值分析模型，研究加筋土边坡在地震作用下，发生的边坡水平位移、坡体变形和边坡的潜在滑动面，以及筋材与土体的耦合特性。计算分析表明：在地震作用下，加筋有效减小了边坡的水平位移，使边坡具有更好的整体性，减小边坡的变形；加筋土边坡在潜在滑动面处的剪应变增量较小，发生滑动的可能性较小；地震作用下，加筋土边坡的筋材承受拉力，且靠近坡脚处的筋材收到的耦合拉应力更大。研究结果对土工合成材料加筋土边坡的抗震设计有一定参考参考价值。
採用有限差分法，建立土工閤成材料加觔邊坡的動力數值分析模型，研究加觔土邊坡在地震作用下，髮生的邊坡水平位移、坡體變形和邊坡的潛在滑動麵，以及觔材與土體的耦閤特性。計算分析錶明：在地震作用下，加觔有效減小瞭邊坡的水平位移，使邊坡具有更好的整體性，減小邊坡的變形；加觔土邊坡在潛在滑動麵處的剪應變增量較小，髮生滑動的可能性較小；地震作用下，加觔土邊坡的觔材承受拉力，且靠近坡腳處的觔材收到的耦閤拉應力更大。研究結果對土工閤成材料加觔土邊坡的抗震設計有一定參攷參攷價值。
채용유한차분법，건립토공합성재료가근변파적동력수치분석모형，연구가근토변파재지진작용하，발생적변파수평위이、파체변형화변파적잠재활동면，이급근재여토체적우합특성。계산분석표명：재지진작용하，가근유효감소료변파적수평위이，사변파구유경호적정체성，감소변파적변형；가근토변파재잠재활동면처적전응변증량교소，발생활동적가능성교소；지진작용하，가근토변파적근재승수랍력，차고근파각처적근재수도적우합랍응력경대。연구결과대토공합성재료가근토변파적항진설계유일정삼고삼고개치。
A dynamic numerical simulation model of geosynthetic reinforced soil slope was established by virtue of finite difference method.Based on this,horizontal displacement,deformation and potential sliding surface of geosynthetic reinforced soil slope and coupling characteristics between geosynthetic and soil were analyzed.It is shown that,under the seismic action ,the horizontal displacement and the deformation of the reinforced soil slope are smaller than those of soil slope without reinforcement.The shear strain increment of the geosynthetic re-inforced soil slope is smaller than that of the soil slope without reinforcement,therefore the possibility of the slope sliding along the potential sliding surface of geosynthetic reinforced soil slope is smaller.The geosynthetic ele-ments near the slope toe bear larger coupling stress.The results are helpful to the seismic design of the geosyn-thetic reinforced soil slope.
