Prediction meta-models for the responses of a circular tunnel during earthquakes  

作　　者：Nazim Abdul Nariman Raja Rizwan Hussain Mohammed A Msekh Peyman Karampour 

机构地区：[1]Engineering Department,Sulaimaniya Health General Directorate,Ministry of Health,Kurdistan Region,Iraq [2]Civil Engineering Department,College of Engineering,King Saud University,11421 Riyadh,Saudi Arabia [3]Civil Engineering Department,College of Engineering,University of Babylon,Babylon,Iraq [4]Department of Mechanical Engineering,Faculty of Engineering,Arak University,Arak,Iran

出　　处：《Underground Space》2019年第1期31-47,共17页地下空间（英文）

摘　　要：Three uncertain parameters(peak ground acceleration,soil density,and soil modulus of elasticity)have been studied with regard to their effects on the stability and damage of a circular tunnel during an earthquake.A time history of an actual earthquake in the literature with modification has been adopted in the numerical simulation and analysis of the tunnel responses.Meta-models have been constructed based on an experimental method with quadratic and interaction terms using matlab codes in order to predict the compressive damage,tensile damage,and the overall displacement of the tunnel.The results of the meta-models predicted a highly reasonable response of the tunnel with regard to the maximum principal stresses in the tunnel lining and predicted a remarkable response of the tunnel with respect to the overall displacement of the tunnel.Moreover,the peak ground acceleration was observed to exert the highest effect on the overall displacement of the tunnel,compared to the soil density and soil modulus of elasticity.Furthermore,the metamodels revealed the inverse relationship between the soil modulus of elasticity and the compressive and tensile damages of the tunnel lining.The meta-models exhibited high efficiency of representation of the behavior of the structural system during earthquakes.

关 键 词：Peak ground acceleration Ovalization META-MODEL Least squares method Compressive damage Tensile damage 

分 类 号：U45[建筑科学—桥梁与隧道工程]