Retrospective and prospective review of the generalized nonlinear strength theory for geomaterials  

作　　者：Shunchuan Wu Jiaxin Wang Shihuai Zhang Shigui Huang Lei Xia Qianping Zhao 

机构地区：[1]Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,MNR,Kunming 650093,China [3]Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,Kunming 650093,China [4]School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [5]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第8期1767-1787,共21页矿物冶金与材料学报（英文版）

基　　金：This research was financially supported by the National Natural Science Foundation of China(Nos.51934003,52334004);Yunnan Innovation Team(No.202105AE 160023);Major Science and Technology Special Project of Yunnan Province,China(No.202102AF080001);Yunnan Major Scientific and Technological Projects,China(No.202202AG050014);Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,MNR,and Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area.

摘　　要：Strength theory is the basic theory for calculating and designing the strength of engineering materials in civil,hydraulic,mechanical,aerospace,military,and other engineering disciplines.Therefore,the comprehensive study of the generalized nonlinear strength theory(GNST)of geomaterials has significance for the construction of engineering rock strength.This paper reviews the GNST of geomaterials to demonstrate the research status of nonlinear strength characteristics of geomaterials under complex stress paths.First,it systematically summarizes the research progress of GNST(classical and empirical criteria).Then,the latest research the authors conducted over the past five years on the GNST is introduced,and a generalized three-dimensional(3D)nonlinear Hoek‒Brown(HB)criterion(NGHB criterion)is proposed for practical applications.This criterion can be degenerated into the existing three modified HB criteria and has a better prediction performance.The strength prediction errors for six rocks and two in-situ rock masses are 2.0724%-3.5091%and 1.0144%-3.2321%,respectively.Finally,the development and outlook of the GNST are expounded,and a new topic about the building strength index of rock mass and determining the strength of in-situ engineering rock mass is proposed.The summarization of the GNST provides theoretical traceability and optimization for constructing in-situ engineering rock mass strength.

关 键 词：rock mechanics rock mass strength strength theory failure criterion Hoek-Brown criterion intermediate principal stress deviatoric plane smoothness and convexity 

分 类 号：TU4[建筑科学—土工工程]