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J. Cent. South Univ. (2016) 23: 3312-3321 DOI: 10.1007/s11771-016-3397-1 Model test to investigate failure mechanism and loading characteristics of shallow-bias tunnels with small clear distance LEI..., a tunnel excavation simulation testing system under typical unsymmetrical loading conditions was established. Using this system, the failure mechanism of surrounding rock of shallow-bias tunnels......
Online LS-SVM for function estimation and classificationJianehua Liu, Jia-nin Chen, Shan Jiane, and Junshi Cheng1) Information Storage Research Center, Shanghai Jiaotong University, Shanghai 200030... Support Vector Machines) was proposed for the application of function estimation and classification. Online LS-SVM means that LS-SVM can be trained in an incremental way, and can be pruned to get......
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specific energy, also the expressions on the equivalent stresses and a function of failure of the LSEST under different principal stress states were obtained. Relationship formulas among the tensile...; total equivalent strain specific energy; limiting strain energy; failure function; strength theory  ......
Influence of Samarium on Learning and Memory Function of Rats Shen Xiuying1,Shi Weilin2,Ma Xiying2 (1.School of Life and Environment, Zhejiang Normal University, Jinhua 321004, China;2.School... in low and middle groups shows a deterioration trend, exhibiting the function degradation of rats'' brain. It may results from the rare earth elements through blood-brain barrier affecting the normal......
, Changsha 410114, China) Abstract: The system reliability models of steel truss beam structure were established. Bending failure modes of beam and carling were selected to be the main failure mode. The β unzipping method was used to establish the failure tree composed by components with lower correlation based on the convention optimization model. The structural optimization design method was presented......
J. Cent. South Univ. (2017) 24: 2406-2420 DOI: https://doi.org/10.1007/s11771-017-3652-0 Failure behavior around a circular opening in a rock mass with non-persistent joints: A parallel-bond stress... on the failure behavior around a circular opening in a rock mass having non-persistent open joints using PFC software package. A parallel-bond stress corrosion (PSC) approach was incorporated to drive......
is different from that predicted by LADE-DUNCAN and MATSUOKA-NAKAI criteria. Based on the test results, an empirical equation of g(b) that is the shape function of the failure surface on π-plane... failure criterion [4], but the predictions from this criterion as shown in Fig.4 overrate the influence of b value on the friction angle. 3.4 Shape function of failure surface on π-plane The measured......
probability. It proceeds in three steps: 1) randomly sampling a large number of input parameters with underlying PDFs, 2) repeatedly running the limit state function for all sets and 3) computing failure... is the number of MCS samples; G(x) is the limit state function, I(G)=1 when G<0; otherwise I(G)=0. The coefficient of variation (COV) of estimated failure probability is expressed as,  ......
the passive rigid retaining wall pressure was deduced considering all displacement modes. First, the general displacement mode function was setup, then the hypotheses were made that the lateral passive...’s theory, but the distribution of the passive pressure and the position of the resultant force depend on the passive displacement mode parameter, and the former is a parabolic function of the soil......