Dynamic Compressive Behavior of Concrete under Cyclic Pore Water Pressure

XIAO Yang; PENG Gang; WU Cong; QIAO Zong-yao; MA Xiao-liang

doi:10.11988/ckyyb.20171189

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Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (6) : 110-115. DOI: 10.11988/ckyyb.20171189

HYDRAULIC STRUCTURE AND MATERIAL

Dynamic Compressive Behavior of Concrete under Cyclic Pore Water Pressure

XIAO Yang^1,2, PENG Gang^1,2, WU Cong^1,2, QIAO Zong-yao^1,2, MA Xiao-liang^1,2

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Abstract

The mechanical properties of concrete subjected to cyclic pore water pressure are studied via dynamic and static triaxial loading tests using 10 MN large multifunctional hydraulic servo instrument. Weibull-Lognormal model and standard-recommended model were used to fit and analyze the stress-strain curves. Test results revealed that in the presence of cyclic pore water pressure, concrete strength decreased apparently under quasi-static and low strain rate loading, while augmented under high strain rate. However, higher loading rate had little effect on the peak strain of concrete. With the increase of loading rate, the peak strain of concrete increased. The elastic modulus of concrete undergone cyclic pore water pressure was higher than that in the absence of cyclic pore water pressure. In the meantime, with the climbing of strain rate, elastic modulus increased also. The full stress-strain curve of concrete can be well fitted by using Weibull-Lognormal model and standard-recommended model, of which the former has better fitting effect in descending segment than the latter does

Key words

concrete / cyclic pore water pressure / dynamic compressive behavior / strain rate / Weibull-Lognormal model

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XIAO Yang, PENG Gang, WU Cong, QIAO Zong-yao, MA Xiao-liang. Dynamic Compressive Behavior of Concrete under Cyclic Pore Water Pressure[J]. Journal of Changjiang River Scientific Research Institute. 2019, 36(6): 110-115 https://doi.org/10.11988/ckyyb.20171189

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