中文摘要：

为了满足工程实际对结构面粗糙度系数JRC的测量要求,采用统计分析和数值模拟方法,以Barton标准粗糙度等级剖面曲线为基础,对大量结构面起伏曲线进行矢量化分析。在充分考虑工程现场结构面起伏形态的实际测量条件基础上,提出利用相对起伏度Ra和伸长率R共同反映结构面粗糙度系数JRC,并将Barton标准粗糙度等级剖面曲线按其与Ra和R的相关性和其几何形态分为平直状、波浪状、锯齿状三类。最终,建立JRC与Ra,R两个因素的经验公式和其图形化表达,分析JRC相对于Ra,R变化的敏感性与R和Ra在各类剖面曲线上的组合范围,并用函数模拟出Barton标准粗糙度等级剖面曲线的起伏形态。为JRC的定量确定及采用JRC-JCS模型快速计算结构面抗剪强度参数提供充足条件。

英文摘要：

In order to meet the measurement requirements of joint roughness coefficient（JRC） in the condition of engineering practice,statistical analysis and numerical simulation method were adopted to carry out the vector analysis of the Bartons standard roughness rating profile curves and some undulate shape of practical rock joints. Taking the measurement condition of joints surface morphology fully into account,relative waviness Ra and elongation R were determined to evaluate JRC. At the same time,the standard roughness rating profile curves were classified as flat,wavy and serrated. Eventually experiential formulas were established and expressed by images and the sensitivity of JRC relative to the change of R and Ra was analyzed and the Bartons standard roughness rating profile curves were expressed by functions. Consequently,the quantitative determination of JRC and the fast calculation of joint shear strength using JRC-JCS model can be achieved.