In order to investigate the effect of microwave
treatment on damage, deformation and energy characteristics of rock under
cyclic loading, uniaxial compression and cyclic loading tests (4 cycles and the upper limits of stress
corresponding to 4 equal points of uniaxial peak strength) are carried out on
basalt specimens with and without microwave treatment respectively, and the
effect of microwave on stressstrain curve, strength, deformation,
damage and energy characteristics of basalts are analyzed. The testing results
show that: (1) The peak strength and deformation of the specimens after
microwave irradiation are negatively correlated to microwave irradiation time.
(2) Due to the effect of microwave, the specimen damage under loading decreases
first and then increases with the increase of cycle number, and the last cycle
causes the greatest damage to the specimens; the longer the irradiation time,
the lower the upper limit of stress in each cycle and the smaller the loading
damage variable. (3) After microwave irradiation, the dissipated energy and
external work in each cycle decrease with the increase of irradiation time, and
the energy for specimen failure decreases with the increase of microwave
irradiation time, thus the microwave irradiation lowers the energy threshold
for specimen failure.
LU Gaoming
,
ZHOU Jianjun
,
ZHANG Bing
,
PAN Dongjiang
,
TONG Tianyang
. Damage, Deformation and Energy Characteristics of
Basalt after Microwave Irradiation Subjected to Cyclic Loading[J]. Tunnel Construction, 2020
, 40(11)
: 1578
-1585
.
DOI: 10.3973/j.issn.2096-4498.2020.11.005
