哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2014年
11期
1320-1326
,共7页
刘红军%李洪江%王虎%吕小辉
劉紅軍%李洪江%王虎%呂小輝
류홍군%리홍강%왕호%려소휘
重正化群%自相似%渗流%断裂损伤%液化带%渗流-应力耦合
重正化群%自相似%滲流%斷裂損傷%液化帶%滲流-應力耦閤
중정화군%자상사%삼류%단렬손상%액화대%삼류-응력우합
renormalization group%self-similarity%seepage%fracture injury%liquefied rupture band%seepage-stress coupling
基于重正化群理论在临界突变问题分析中的优势和岩土体的自相似特性,从海床土微观结构入手,引入三维颗粒堆积模型来描述孔隙渗流临界行为,找到了土体渗流与临界孔隙率的关系,给出了海床介质孔隙率与渗流发生的物理判别准则。在土体二元介质理论基础上,分析了饱和海床土宏观液化与微观强度的定量关系,构建了海床土体微单元破坏的重正化群模型,并对结构面断裂损伤临界概率进行了研究。研究结果表明:海床土液化是渗流-应力耦合场共同作用的结果,微单元体断裂损伤导致液化贯通带形成,进而引起海床土的宏观液化,液化贯通带的提出对研究海床土液化破坏规律有极其重要的意义。
基于重正化群理論在臨界突變問題分析中的優勢和巖土體的自相似特性,從海床土微觀結構入手,引入三維顆粒堆積模型來描述孔隙滲流臨界行為,找到瞭土體滲流與臨界孔隙率的關繫,給齣瞭海床介質孔隙率與滲流髮生的物理判彆準則。在土體二元介質理論基礎上,分析瞭飽和海床土宏觀液化與微觀彊度的定量關繫,構建瞭海床土體微單元破壞的重正化群模型,併對結構麵斷裂損傷臨界概率進行瞭研究。研究結果錶明:海床土液化是滲流-應力耦閤場共同作用的結果,微單元體斷裂損傷導緻液化貫通帶形成,進而引起海床土的宏觀液化,液化貫通帶的提齣對研究海床土液化破壞規律有極其重要的意義。
기우중정화군이론재림계돌변문제분석중적우세화암토체적자상사특성,종해상토미관결구입수,인입삼유과립퇴적모형래묘술공극삼류림계행위,조도료토체삼류여림계공극솔적관계,급출료해상개질공극솔여삼류발생적물리판별준칙。재토체이원개질이론기출상,분석료포화해상토굉관액화여미관강도적정량관계,구건료해상토체미단원파배적중정화군모형,병대결구면단렬손상림계개솔진행료연구。연구결과표명:해상토액화시삼류-응력우합장공동작용적결과,미단원체단렬손상도치액화관통대형성,진이인기해상토적굉관액화,액화관통대적제출대연구해상토액화파배규률유겁기중요적의의。
With the advantage of renormalization group theory in critical mutation analysis and the self-similar char-acteristics of soil materials, the critical behavior of pore percolation and the relationships between seepage and criti-cal porosity were found.In this paper, the critical behavior is described by the three-dimensional particle packing model from the microstructure of seabed soil.Specifically, the physical criterion is given to judge the seepage condi-tions associated with seabed medium porosity.Based on the binary medium theory, the quantitative relationship of macro-liquefaction and micro-strength of saturated seabed soil is analyzed.At the same time, the microbalance unit damage renormalization group model of seabed soil is built, and fracture damage critical probability of structural surface is studied.The results showed that the seabed soil liquefaction results from the interaction of seepage and stress coupling field.The formation of liquefied rupture band as a critical state is resulted from fracture damage of the micro unit cell, which leads to the macroscopic liquefaction of seabed soil.The soil liquefied rupture band method is important for the study of liquefaction failure regularity of saturated seabed soil.