CAJ | 학술논문

在地下空间被大规模开发的过程中，地下结构抗震问题逐渐得到重视，由于地下结构的特殊性，对于地下结构周围地基土动力性质的研究显得尤为重要。土在动荷载作用下会出现非线性、滞后性和变形累积性等力学特性，骨架曲线可以通过实测资料采用函数进行拟合的方式确定。本文以武汉地区软土为研究对象，通过共振柱试验得到不同围压下剪应变和剪切模量的关系，并拟合出Davidenkov模型中的参数。以OpenSees地震工程模拟开放体系为平台进行二次开发，编制Davidenkov模型材料子程序，并对该黏土在地震作用下的动力响应进行了分析，同时对比试验结果验证了程序的可靠性。
재지하공간피대규모개발적과정중，지하결구항진문제축점득도중시，유우지하결구적특수성，대우지하결구주위지기토동력성질적연구현득우위중요。토재동하재작용하회출현비선성、체후성화변형루적성등역학특성，골가곡선가이통과실측자료채용함수진행의합적방식학정。본문이무한지구연토위연구대상，통과공진주시험득도불동위압하전응변화전절모량적관계，병의합출Davidenkov모형중적삼수。이OpenSees지진공정모의개방체계위평태진행이차개발，편제Davidenkov모형재료자정서，병대해점토재지진작용하적동력향응진행료분석，동시대비시험결과험증료정서적가고성。
Anti-seismic of underground structures is being focused gradually during the process of large-scale development. Due to its specialties, the research of the dynamic behavior of soil around underground structures is particularly significant. Soil dynamic mechanics characteristic includes nonlinear characteristic, hysteresis characteristic and the effect of strain accumulated. Skeleton curves are fitted by measured data. In this paper, model parameters are fitted by resonant column tests, in which soft soil in Wuhan area was regarded as the research object. The Davidenkov model has been implemented into the OpenSees software as user-defined materials. The seismic response analysis of soil was performed.