合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2013年
11期
1347-1351
,共5页
詹炳根%叶晓华%韩丁%阮宜东
詹炳根%葉曉華%韓丁%阮宜東
첨병근%협효화%한정%원의동
宕渣土%桥背回填%回弹模量%冲击荷载%累积变形
宕渣土%橋揹迴填%迴彈模量%遲擊荷載%纍積變形
탕사토%교배회전%회탄모량%충격하재%루적변형
earthworks mixture%backfilling of bridge back%rebound modulus%impact load%accumula-ted deformation
为了研究宕渣土作为桥背回填材料的冲击累积变形,文章通过现场冲击累积变形试验,对试验结果进行ABAQUS有限元仿真模拟,分析其回弹模量和内摩擦角,用所得的参数建立动态黏弹性模型,得到桥背回填宕渣土在冲击荷载下的力学响应和累积变形特征。研究表明:宕渣土适宜作为桥背回填材料,且随着冲击次数的不断增加,桥背回填处宕渣土路基的回弹模量呈线性增长,而累积沉降呈幂函数形式增长,但增长速率逐渐变缓,最终达到稳定。
為瞭研究宕渣土作為橋揹迴填材料的遲擊纍積變形,文章通過現場遲擊纍積變形試驗,對試驗結果進行ABAQUS有限元倣真模擬,分析其迴彈模量和內摩抆角,用所得的參數建立動態黏彈性模型,得到橋揹迴填宕渣土在遲擊荷載下的力學響應和纍積變形特徵。研究錶明:宕渣土適宜作為橋揹迴填材料,且隨著遲擊次數的不斷增加,橋揹迴填處宕渣土路基的迴彈模量呈線性增長,而纍積沉降呈冪函數形式增長,但增長速率逐漸變緩,最終達到穩定。
위료연구탕사토작위교배회전재료적충격루적변형,문장통과현장충격루적변형시험,대시험결과진행ABAQUS유한원방진모의,분석기회탄모량화내마찰각,용소득적삼수건립동태점탄성모형,득도교배회전탕사토재충격하재하적역학향응화루적변형특정。연구표명:탕사토괄의작위교배회전재료,차수착충격차수적불단증가,교배회전처탕사토로기적회탄모량정선성증장,이루적침강정멱함수형식증장,단증장속솔축점변완,최종체도은정。
In order to study the accumulated deformation brought about by the impact on the bridge back backfilled with earthworks mixtures ,the site impact accumulated deformation tests were carried out ,and the test results were simulated by the finite element software ABAQUS .The mechanical re-sponse and accumulated deformation characteristics were obtained through the analysis of rebound modulus and internal friction angles ,and the parameters were used to construct the dynamic viscoelas-tic model .It is concluded that the earthworks mixtures are appropriate to be backfilling materials .Be-sides ,as the number of the impact increases ,the rebound modulus of the bridge back roadbed back-filled with earthworks mixtures increases in a linear way ,and the accumulated settlement grows in a way of power function ,but its rate of growth slows down gradually into a stable level .