【摘要】：采用理論分析及試驗(yàn)研究方法對(duì)風(fēng)雨共同作用下的結(jié)構(gòu)荷載與響應(yīng)進(jìn)行了研究。首先在確定風(fēng)雨聯(lián)合作用概率模型的基礎(chǔ)上通過對(duì)降雨作用特性的分析,比較了雨滴沖擊作用模型和空氣密度等效變化模型對(duì)建筑結(jié)構(gòu)等效靜力的作用性能;其次,基于高精度風(fēng)雨耦合荷載環(huán)境模擬試驗(yàn)設(shè)備,進(jìn)行了風(fēng)雨定常氣動(dòng)力荷載模型高頻天平測(cè)力試驗(yàn),研究了簡(jiǎn)單幾何形體的風(fēng)雨定常荷載變化規(guī)律;然后,采用二維懸掛系統(tǒng)測(cè)振試驗(yàn)方法,研究了風(fēng)雨非定常氣動(dòng)力荷載模型及其結(jié)構(gòu)振動(dòng)響應(yīng)特點(diǎn);最后,對(duì)纜索承重橋梁拉索風(fēng)雨激振現(xiàn)象進(jìn)行耦合荷載環(huán)境參數(shù)精細(xì)化控制試驗(yàn),揭示了拉索空間姿態(tài)、拉索動(dòng)力特性、來流風(fēng)速和不同雨強(qiáng)組合等條件對(duì)拉索風(fēng)雨振的影響規(guī)律。
[Abstract]:The structural load and response under the combined action of wind and rain are studied by theoretical analysis and experimental study. Firstly, on the basis of determining the probability model of combined action of wind and rain, through the analysis of the characteristics of rainfall action, the effects of raindrop impact model and equivalent variation model of air density on the equivalent static behavior of building structure are compared. Secondly, based on the high-precision wind and rain coupling load environment simulation test equipment, the wind and rain steady aerodynamic load model high-frequency balance force measurement test is carried out, and the change law of the simple geometric body's wind and rain steady load is studied. Then, the unsteady aerodynamic load model of wind and rain and the characteristics of structural vibration response are studied by using two-dimensional suspension system vibration measurement test method. Finally, the wind and rain vibration of cable bearing bridge is controlled by coupling load environment parameter refinement control test, which reveals the spatial attitude of cable and the dynamic characteristics of cable. The effect of wind speed and different rain intensity combinations on the wind and wind vibration of cable is studied.
【作者單位】： 同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51178353;91215302;51222809;2013CB036300)
【分類號(hào)】：U441.3

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