CAJ | 학술논문

采用复合材料力学分析方法,针对规则节理岩体考虑坐标转换及刚度系数,建立各向异性等效弹性参数的解析公式.通过算例证明了解析公式的可行性,同时对规则节理岩体等效参数规律性进行了研究,分析在不同的节理刚度比值下等效弹性参数的变化规律.结合白鹤滩坝址区柱状节理岩体特征,探讨了其等效弹性参数取值和各向异性特征.研究表明:所采用方法在刚度取值相等时岩体可退化为各向同性介质,且该方法计算结果与实测结果较为吻合;同时发现柱体偏转对等效弹性参数的影响较大,偏转后水平向和铅直向弹性模量分别降低约54%和17%,根据曲线规律性,偏转角度越大,降低程度越高,等效弹性参数的曲线变化反映了其具有明显的各向异性特征.
채용복합재료역학분석방법,침대규칙절리암체고필좌표전환급강도계수,건립각향이성등효탄성삼수적해석공식.통과산예증명료해석공식적가행성,동시대규칙절리암체등효삼수규률성진행료연구,분석재불동적절리강도비치하등효탄성삼수적변화규률.결합백학탄패지구주상절리암체특정,탐토료기등효탄성삼수취치화각향이성특정.연구표명:소채용방법재강도취치상등시암체가퇴화위각향동성개질,차해방법계산결과여실측결과교위문합;동시발현주체편전대등효탄성삼수적영향교대,편전후수평향화연직향탄성모량분별강저약54%화17%,근거곡선규률성,편전각도월대,강저정도월고,등효탄성삼수적곡선변화반영료기구유명현적각향이성특정.
Analytical formulas of anisotropic equivalent elastic parameters are established by using mechanical method of complex material. An example is made to show the feasibility and efficiency of the analytical formulas. Meanwhile, the coordinate transformation and jointed factor of regular jointed rock mass are considered. The rules of equivalent elastic parameters of regular jointed rock mass are studied. Variation rules of equivalent elastic parameters under different jointed factors are analyzed. Combining with the properties of columnar jointed rock mass in Baihetan dam site, the anisotropic characteristics and values of elastic parameters are analyzed. The results show that the jointed rock mass can degenerate into isotropic medium when the stiffness is equal; and the calculated values by using the method in the paper are well in accord with the test results in the dam site. The cylinder deflection has more effect on the equivalent elastic parameters. The results also show that after deflection, the horizontal elastic modulus and vertical modulus are reduced by 54% and 17% respectively. According to the curves, the higher the angle of cylinder, the greater reduction the elastic modulus would have. This change rule of equivalent elastic parameters revealed obvious anisotropic property of columnar jointed rock mass.