In order to study the vibration response mechanism of
adjacent frame structure to tunnel blasting, taking a fivestory
frame structure residential building as an example，a
threedimensional numerical calculation model based on
tunnel blasting, surrounding rock and frame structure is established with the
help of ANSYS/LSDYNA to analyze the vibration response
of adjacent frame structure to tunnel blasting construction. The results show
that the numerical simulation clearly demonstrates the change of stress field
and displacement field of surrounding rock and frame structure under blasting
action, and gives the propagation process of blasting vibration wave from
surrounding rock to frame structure. Combined with the field measured data and
numerical calculation results, the timehistory curve
and frequency distribution characteristics of vibration velocity at some
locations are compared and analyzed, and the reliability of the numerical
simulation method is verified. Under the blasting action of tunnel, the
vibration response of beams, columns and external walls of adjacent frame
structure is not consistent, and the vibration response varies with the height
of the structure. The blasting of the tunnel results in obvious stress
concentration in some parts of frame structure, which mainly occurs at the
bottom of external wall and the joint of external wall with column, beam and
floor, etc.[KG-*3], indicating that these positions are more likely to suffer
damage or even crack during tunnel blasting.
ZHANG Chunwu
.
Vibration Response Analysis of Adjacent Frame
Structure to Shallow
Buried Tunnel Blasting Construction
[J]. Tunnel Construction, 2020
, 40(S2)
: 93
-99
.
DOI: 10.3973/j.issn.2096-4498.2020.S2.012
