Damage evaluation and seismological mechanism of frostquakes
ZHOU Meng1,2, FAN Jiansheng1, NIE Jianguo1
1. Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China;
2. Zhuhai Urban Planning Verifying & Information Center, Zhuhai 519000, China
Abstract：The frostquake is a new kind of natural hazard. It shares similar phenomena with the precursory events of large destructive earthquakes. This has caused wide panic of the damage that frostquakes may bring about, and hence placed increasing importance on damage evaluation for the frostquake. However, no scientific theory has been developed for mechanism explanation and quantitative damage evaluation of frostquakes in previous studies. An amount of Chinese reports even confound the frostquake with the icequake. In this paper, a series of available frostquake reports in the literature have been reviewed and discussed. Based on this review, the maximum intensity and highest peak ground acceleration (PGA) level of the frostquake is evaluated by adopting the elastic deformation assumption and conservation of energy assumption. The proposed theory predicts that the possibly maximum intensity of the frostquake is VI modified Mercalli intensity and its possibly highest PGA exhibits lower that 10 percent of that of earthquake elcentro-NS, which is a typical tectonic destructive earthquake. It is concluded that the frostquake effect may cause crack opening but no destructive damage in general reinforced concrete civil facilities.
周萌, 樊健生, 聂建国. 新型灾害冻震震害分析及形成机理[J]. 清华大学学报（自然科学版）, 2017, 57(10): 1063-1069.
ZHOU Meng, FAN Jiansheng, NIE Jianguo. Damage evaluation and seismological mechanism of frostquakes. Journal of Tsinghua University(Science and Technology), 2017, 57(10): 1063-1069.
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2017, Vol. 57 
