Abstract The limit states of railway tunnel portal structure including compression, tensile, anti-overturning, antisliding and bearing capacity of foundation should be considered when portal structure is designed based on the probability limit state method. In order to evaluate the reliability of portal structure, the reliability index and limit state of bearing capacities of different limit states need to be calculated. The traditional methods generally use hand computation combined with MATTLAB, ANSYS, EXCEL and other softwares, which has low computation efficiency and poor practicality. In view of above problems, a calculating software for portal structure was developed based on the probability limit state method and Visual Basic platform, which realizes the function of rapid calculation of reliability index and limit state of bearing capacities under five limit states of portal structure, offers three methods to calculate the reliability index including JC method, fractile method and Monte-Carlo method. Moreover, the calculation results can be written in the EXCEL template file, greatly improving the efficiency of tunnel portal structure calcula? tion. The accuracy of the software is verified by comparing with the results of hand calculation.
Abstract：
The limit states of railway tunnel portal structure including compression, tensile, anti-overturning, antisliding and bearing capacity of foundation should be considered when portal structure is designed based on the probability limit state method. In order to evaluate the reliability of portal structure, the reliability index and limit state of bearing capacities of different limit states need to be calculated. The traditional methods generally use hand computation combined with MATTLAB, ANSYS, EXCEL and other softwares, which has low computation efficiency and poor practicality. In view of above problems, a calculating software for portal structure was developed based on the probability limit state method and Visual Basic platform, which realizes the function of rapid calculation of reliability index and limit state of bearing capacities under five limit states of portal structure, offers three methods to calculate the reliability index including JC method, fractile method and Monte-Carlo method. Moreover, the calculation results can be written in the EXCEL template file, greatly improving the efficiency of tunnel portal structure calcula? tion. The accuracy of the software is verified by comparing with the results of hand calculation.
.Development of the Software for Calculating Tunnel Portal Structure Based on the Theory of Limit State Method[J] MODERN TUNNELLING TECHNOLOGY, 2018,V55(6): 19-25
2018, Vol. 55 