本文選題：表面波條件　切入點(diǎn)：地震　出處：《震災(zāi)防御技術(shù)》2017年01期 　論文類(lèi)型：期刊論文

【摘要】：地震動(dòng)斜入射條件下海洋場(chǎng)地簡(jiǎn)化為理想流體海水-兩相介質(zhì)海床-彈性固體基巖系統(tǒng)模型,通常假定為靜水液面條件。本文以地震動(dòng)SV波為例,推導(dǎo)了表面波條件下海洋場(chǎng)地動(dòng)力反應(yīng)解析解,研究了表面波條件對(duì)海水動(dòng)水壓力的影響。研究表明,表面波頻率在大于0.5Hz時(shí)對(duì)海水動(dòng)水壓力幾乎無(wú)影響,在小于0.5Hz范圍內(nèi)有影響,且越接近水面、頻率越低時(shí)影響越顯著。實(shí)際地震動(dòng)卓越頻率通常大于0.5Hz,因而地震動(dòng)作用下采用忽略表面波條件的靜水液面假定是合理的。進(jìn)一步結(jié)合線(xiàn)性波浪理論,研究SV波和波浪聯(lián)合作用下表面波條件對(duì)海水動(dòng)水壓力的影響。研究表明,由于波浪屬于低頻荷載且頻率通常小于0.5Hz,在地震和波浪聯(lián)合作用下表面波條件的影響較地震單獨(dú)作用更為顯著。
[Abstract]:The site was simplified as an ideal fluid two-phase medium elastic seabed seawater - solid bedrock under seismic dynamic system model of oblique incidence, it is usually assumed to be hydrostatic level conditions. This paper use the seismic SV wave as an example, the solution of dynamic site response analysis of ocean wave conditions is derived, studied the effect of surface condition on the dynamic sea water pressure. Research shows that surface wave frequency is greater than 0.5Hz in seawater on the hydrodynamic pressure has almost no influence, in the range of less than 0.5Hz, and the closer to the surface, the lower the frequency when the influence is more significant. The actual earthquake predominant frequency is usually greater than 0.5Hz, under the action of the hydrostatic level ignore wave conditions assumption is reasonable and ground motion according to the linear wave theory. Further, the combined effects of SV wave of waves and wave conditions of seawater hydrodynamic pressure. The results show that the wave is the low load The frequency is usually less than 0.5Hz, and the influence of surface wave conditions under the combined action of earthquake and wave is more significant than that of earthquake alone.

【作者單位】： 北京工業(yè)大學(xué)城市與工程安全減災(zāi)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家973項(xiàng)目(2011CB013600) 國(guó)家自然科學(xué)基金項(xiàng)目(51322813)
【分類(lèi)號(hào)】：P315;P731.2;P75

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本文編號(hào)：1642703