Modeling of early age behavior of underground structure

Title: Modeling of early age behavior of underground structure
Author(s): Z. Qi, L. Xian, Y. Yong
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 801 - 807
Total Pages: 7
Nb references: 3
Language: English

Abstract: At early ages, concrete cast-in-place tends to crack owing to transportation of heat and moisture. Due to the underground water and complex boundary during construction, the crack control of underground structure poses an important role in early age.
This paper deals with the concrete crack prediction by analyzing the moisture, temperature and stress distribution. To predict the response of a structural member in the early period of construction with age, a step-by-step method is necessary. At each step, deformation due to thermal variation, drying shrinkage, and creep during current time interval is imposed. The construction process is simulated by FEM for cracking prediction, and the time-dependent factors are taken into account, such as boundary and concrete strength.
This paper takes a project in Shanghai for example to apply above method. The critical position and crack width are predicted. Finally, corresponding advices for structure design and for construction are given to prevent early age cracking.

Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00