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J. Cent. South Univ. (2020) 27: 2914-2929 DOI: https://doi.org/10.1007/s11771-020-4518-4 Experimental investigation on influence of loading rate on rockburst in deep circular tunnel under true...: To investigate the influence of loading rate on rockburst in a circular tunnel under three-dimensional stress conditions, the true-triaxial tests were conducted on 100 mm×100 mm×100 mm cubic sandstone......
; 文献标志码:A 文章编号:1672-7207(2014)12-4362-08 Extraction of strain influence line of bridge from dynamic responses WANG... 230009, China) Abstract: The strain influence line of measure points on bridge structure was obtained by inversing the dynamic response of calibrated vehicle crossing the bridge structure. Based......
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7 水分传感器布置剖面示意图 Fig. 7 Schematic diagram of profile arrangement about moisture sensor 表4 注液孔影响半径及孔周入渗强度的计算值与试验值 Table 4 Calculated value and experimental value of influence...对影响半径的影响 Fig. 8 Influence of aperture on influence radius 从图8可以看出,当注液孔半径小于0.2 m时,随注液孔孔径增加,影响半径成非线性增加;当注液孔半径大于0.2 m时,随注液孔孔径增加,影响半径近似成线性增加.为进一步反映注液孔孔径对影响半径的影响,采用幂函数R=A′×r0B′(A′和B′为拟合参数)拟合影响半径与孔径的关......
. Key words: subway station; internal explosion; nonlinear dynamic analysis; influence factor 1 Introduction The construction of the underground structures has greatly lessened traffic jams. However......
,TA1,TA2和TA3分别表示车辆第1至第3轴进桥时间,TC1,TC2和TC3分别表示车辆第1至第3轴出桥时间. 图3 实际影响线拟合提取示意图 Fig. 3 Example of actual influence line extraction 三轴车辆轴质量分别记为m1,m2和m3,桥梁测点挠度影响线离散矢量记为LDI,移动车辆作用下测点响应的拟合曲线离散矢量记为,,将实测响应R与拟合值之差...FDA计算.基于实际影响线的FDA计算定义如下: (8) 其中:rmax为由桥梁实际影响线重构的准静态响应的最大值,如图5所示. 图5 基于实际影响线的FDA计算方法 Fig. 5 Illustration of FDA calculation method based on actual influence line 3 数值计算 以三轴车辆通过等截面简支梁为例,基于Matlab数值计算平台进行编......
main factors, i.e., the shape parameters, the influence domain size, and the nodal distribution, on the accuracy of the radial point interpolation method (RPIM) are systematically studied and conclusive... analysis. This recommended range of shape parameters is examined by multiple benchmark examples in 3D solid mechanics. Second, through numerical experiments, an average of 30-40 nodes in the influence......