关键词: 浅埋隧道, 爆破作用, 数值模拟, 框架结构, 振动响应

Abstract: In order to study the vibration response mechanism of adjacent frame structure to tunnel blasting, taking a fivestory frame structure residential building as an example，a threedimensional numerical calculation model based on tunnel blasting, surrounding rock and frame structure is established with the help of ANSYS/LSDYNA 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 timehistory 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.

Key words: shallow buried tunnel, blasting effect, numerical simulation, frame structure, vibration response