【摘要】 为了了解影响隧道动态内力峰值出现位置的相关因素.利用希尔伯特—黄变换,对E1 Centro等4条天然地震波和某隧道人工波(简称LBG地震波)进行了时频分析,结果表明:1)地震波各频段内所含能量的大小是影响隧道动态响应的主要因素;2)地震波中所包含的瞬时能量和总能量在时域上的分布决定了隧道内力及塑性应变最大峰值的出现时间;3)隧道内力峰值及最大塑性应变出现的位置与隧道断面形状及周围介质对衬砌的约束状态有关,与地震波的类型无关.更多还原

【Abstract】 In order to intensivly understand the relationship between seismic wave and dynamic response of tunnel liner and search the influencing factors that affect the appearance place of peak-value of internal-force in tunnel liner,the time-frequency analysis about four inartificial earthquake waves included E1 Centro and one artificial earthquake wave(abbreviation LBG) have been carried out by the Hilbert-Huang transform.By this method,the distribution of earthquake wave energy in the time-field and the frequency-field have been provided.The results show that: 1) the energy magnitude of earthquake wave in the every frequency channel is the governing factor on dynamic response of tunnel;2) the time when peak value of internal force and the plastic strain of tunnel comes,has been determined by the distribution of wave’s instantaneous energy and total energy in the time-field and 3) the positions where peak value of the internal force and the plastic strain of tunnel locates,have no relations with the type of seismic wave but transverse shapes of tunnel and the constraint conditions of surrounding rock.更多还原