TY  - EJOU
AU  - Jang, Kyong Pil  
AU  - Son, Je kuk  
AU  - Kwon, Seung Hee  

TI  - Prediction of Interfacial Cracking due to Differential Drying Shrinkage of Concrete in Precast Shell Pier Cap
T2  - Computers, Materials \& Continua

PY  - 2013
VL  - 38
IS  - 3
SN  - 1546-2226

AB  - In a precast shell pier cap, cracking at the interface between the precast shell and the cast-in-place concrete may happen due to differences between the drying shrinkage of the inner and the outer concrete. The objective of this study is to establish a prediction method for interfacial cracking that will consider the real mechanism of differential drying shrinkage and creep. The main parameters used in the analysis were determined from experiments for a concrete mix that is applied to the manufacturing of pier caps. The variation of internal relative humidity over time was first calculated based on the nonlinear moisture diffusion; cracking analysis then followed. Prediction of the initiation of interface cracks and the increase of their width over time was performed. It was found that additional reinforcement across the interface is very effective at reducing crack width.
KW  - Interfacial cracking
KW  -  Precast pier cap
KW  -  Differential drying shrinkage
KW  -  Creep
KW  -  Moisture diffusion

DO  - 10.3970/cmc.2013.038.155