Seismic Response Analysis of Concrete Lining Structure in Large Underground Powerhouse

Abstract

Based on the dynamic damage constitutive model of concrete material and seismic rock-lining structure interaction analysis method, the seismic response of lining structure in large underground powerhouse is studied in this paper. In order to describe strain rate dependence and fatigue damage of concrete material under cyclic loading, a dynamic constitutive model for concrete lining considering tension and shear anisotropic damage is presented, and the evolution equations of damage variables are derived. The proposed model is of simple form and can be programmed into finite element procedure easily. In order to describe seismic interaction characteristics of the surrounding rock and lining, an explicit dynamic contact analysis method considering bond and damage characteristics of contact face between the surrounding rock and lining is proposed, and this method can integrate directly without iteration. The proposed method is applied to seismic stability calculation of Yingxiuwan Underground Powerhouse, results reveal that the amplitude and duration of input seismic wave determine the damage degree of lining structure, the damage zone of lining structure is mainly distributed in its arch, and the contact face damage has great influence on the stability of the lining structure.

Seismic Response and Security Assessment of Cross-Fault Hydraulic-Tunnel Lining Structures

“…Taking the contact model of the surrounding rock and lining structure as an example, as shown in Figure 1, the contact system is discretized by finite elements, and the discretized meshes on the contact surfaces of different media are the same, generating one-toone corresponding node pairs, and the dynamic contact forces on the node pairs are equal in magnitude and opposite in direction [37][38][39]. The differential equation of motion for a node in a node pair is:…”

A Research on Fatigue Damage Constitutive Equation of Asphalt Mixture

“…The pavement under a cumulative load is prone to fatigue failure. The fatigue behaviors of pavement materials have become the research directions of an increasing number of researchers [1][2][3][4].…”

“…The constitutive equation and damage evolution of each damage model also differ widely. It is not appropriate to describe the constitutive equations only by using elastic or plastic theory, nor is it to describe the fatigue damage constitutive equation by applying only one existing damage model directly [4,10,11].…”