Details

Autor(en) / Beteiligte

• Wang, Gaohui
• Wang, Yongxiang
• Lu, Wenbo
• Yu, Mao
• Wang, Chao

Titel

Deterministic 3D seismic damage analysis of Guandi concrete gravity dam: A case study

Ist Teil von

• Engineering structures, 2017-10, Vol.148, p.263-276

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2017

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• •3D seismic damage-cracking analysis of the Guandi gravity dam is presented.•Joint nonlinearity and dam-reservoir-foundation interaction are considered.•The influence of cross-stream excitation and contraction joint is investigated.•The importance of 3D analyses is emphasized for such system. This paper presents an original investigation of the seismic cracking behavior of Guandi concrete gravity dam, which is located in the highly seismic zone of China. For this purpose, three dimensional nonlinear finite element analyses are carried out for the Guandi dam-reservoir-foundation system, with the effects of contraction joints and cross-stream seismic excitation considered. The Concrete Damaged Plasticity (CDP) model is utilized to model concrete cracking under seismic loading. The opening/closing and sliding behaviors of contraction joints during earthquake events are modeled using two different surface-to-surface contact models (soft and hard pressure-clearance relationships), which aims to quantify the effect of grouting materials between the joint surfaces. The dynamic interaction between the impounded water and the dam-foundation system is explicitly taken into account by modeling the reservoir water with three dimensional fluid finite elements in the Lagrangian formulation. Several case studies are examined and the results reveal the significant influence of contraction joints and cross-stream ground motions on the dynamic response and damage-cracking risk of the Guandi concrete gravity dam.