000013384 001__ 13384
000013384 005__ 20161114160338.0
000013384 04107 $$aeng
000013384 046__ $$k2009-06-22
000013384 100__ $$aRen, Qingwen
000013384 24500 $$aSeepage-stress-damage coupling analysis of hydraulic tunnel due to its liner cracking

000013384 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013384 260__ $$bNational Technical University of Athens, 2009
000013384 506__ $$arestricted
000013384 520__ $$2eng$$aDeep tunnel is a kind of structure widely used in huge hydraulic projects built in west of china. Because of some micro cracks in the reinforced concrete liner induced by high internal water pressure, the stresses in the liner and its surrounding rock mass change and seepage-stress coupling analysis is more reasonable. In this paper a seepage-stress-damage coupling analysis model is presented to model the damage cracking, the changing of the seepage field and the stresses of rebar in the liner. The seepage-stress-damage coupling equation in finite element format is deduced and double spring model is introduced to model the bond slip between the rebar and the liner concrete. At last, the model is applied to study the effect of seepage due to the liner cracking on the stresses in the liner. The coupling analysis results reveal that the permeability in the damage cracking region increases highly and the tensile stress of the rebar in the liner decreases, which is different with the general reinforced concrete structure, called “retraction phenomenon”.

000013384 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013384 653__ $$ahydraulic tunnel; seepage-stress-damage coupling model; reinforced concrete liner; permeability Abstract. Deep tunnel is a kind of structure widely used in huge hydraulic projects built in west of china. Because of some micro cracks in the reinforced concrete liner induced by high internal water pressure, the stresses in the liner and its surrounding rock mass change and seepage-stress coupling analysis is more reasonable. In this paper a seepage-stress-damage coupling analysis model is presented to model the damage cracking, the changing of the seepage field and the stresses of rebar in the liner. The seepage-stress-damage coupling equation in finite element format is deduced and double spring model is introduced to model the bond slip between the rebar and the liner concrete. At last, the model is applied to study the effect of seepage due to the liner cracking on the stresses in the liner. The coupling analysis results reveal that the permeability in the damage cracking region increases highly and the tensile stress of the rebar in the liner decreases, which is different with the general reinforced concrete structure, called “retraction phenomenon”.

000013384 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013384 720__ $$aRen, Qingwen$$iDu , Xiaokai$$iDu , Chengbin
000013384 8560_ $$ffischerc@itam.cas.cz
000013384 8564_ $$s172372$$uhttps://invenio.itam.cas.cz/record/13384/files/CD565.pdf$$yOriginal version of the author's contribution as presented on CD, section: Reinforced concrete structures - i.
000013384 962__ $$r13074
000013384 980__ $$aPAPER