A study on the contraction joint element and damage constitutive model for concrete arch dams  

作　　者：Qiang XU Jian-yun CHEN Jing LI Hong-yuan YUE 

机构地区：[1]School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, China [2]State Key Laboratory of Coastal and OffShore Engineering, Dalian University of Technology, Dalian 116023, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2014年第3期208-218,共11页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project supported by the National Natural Science Foundation of China （Nos. 51109029, 51178081, 51138001, and 51009020）, and the State Key Development Program for Basic Research of China （No. 2013CB035905）

摘　　要：A new contraction joint element model for the interface in different meshes between the arch dam sections is con- structed. The study on the elastic-plastic damage constitutive model for concrete, which is applied to multi-axial stresses, is also taken. The models of the dam-foundation-reservoir system for Xingbiling and Jinping concrete arch dams, China are calculated using the proposed contraction joint elements and the elastic-plastic damage constitutive model to verify the proposed models. Results showed that the proposed contraction joint element model has a high precision in simulating the behavior of contraction joints and the elastic-plastic damage constitutive model has a high precision in simulating the behavior of the damage to the concrete.研究目的:研究混凝土拱坝多尺度横缝单元和坝体损伤。创新要点:解决了拱坝坝段单元采用不同剖分形式(即多尺度剖分形式)时,在静动力荷载下,拱坝横缝开度和坝体损伤的计算。研究方法:首先建立大尺度交接面单元和小尺度单元坝段自由度耦合,然后建立大尺度交接面单元和大尺度单元坝段横缝单元模型,并对坝体损伤本构的计算进行研究。重要结论:通过对比计算发现,通过混凝土的损伤本构计算的应力峰值和实验结果相同,下降段的应力应变曲线基本吻合。提出的不同尺度横缝单元模型对坝体应力和横缝开度的计算误差在7%以内。

关 键 词：Contraction joint element DAMAGE CONCRETE Arch dam Constitutive model 

分 类 号：TV3[水利工程—水工结构工程]