本文選題：壓電智能骨料　切入點(diǎn)：靈敏度　出處：《混凝土》2017年12期

【摘要】：為研究壓電智能骨料監(jiān)測(cè)結(jié)構(gòu)內(nèi)部應(yīng)力的可行性,通過力錘直接敲擊智能骨料和電液伺服試驗(yàn)機(jī)加載嵌入智能骨料的鋼管石英砂柱兩種模式進(jìn)行,分析壓電智能骨料的輸出電壓值與作用在其上的應(yīng)力值,標(biāo)定壓電智能骨料的靈敏度。試驗(yàn)結(jié)果表明:在兩種加載模式下壓電智能骨料輸出電壓值與外力值具有較好的線性關(guān)系,且其標(biāo)定值都與理論值吻合較好。在往復(fù)荷載加載模式下埋置在鋼管石英砂柱中的智能骨料所受圍壓作用對(duì)其靈敏度影響較小,智能骨料靈敏度不會(huì)隨鋼管長(zhǎng)細(xì)比及加載力改變而改變。驗(yàn)證了壓電智能骨料對(duì)結(jié)果應(yīng)力監(jiān)測(cè)的可行性。
[Abstract]:In order to study the feasibility of monitoring the internal stress of the structure with piezoelectric intelligent aggregate, two modes of loading the steel tube quartz sand column embedded in intelligent aggregate by force hammer and electro-hydraulic servo testing machine were carried out. The output voltage of piezoelectric intelligent aggregate and the stress value acting on it are analyzed. The sensitivity of piezoelectric intelligent aggregate is calibrated. The experimental results show that there is a good linear relationship between the output voltage and external force of piezoelectric intelligent aggregate under two loading modes. The calibration values are in good agreement with the theoretical values. The confining pressure of the intelligent aggregate buried in the steel tube quartz sand column under the reciprocating loading mode has little effect on its sensitivity. The sensitivity of intelligent aggregate does not change with the change of the aspect ratio of steel tube and the loading force, which verifies the feasibility of monitoring the stress of the result by piezoelectric intelligent aggregate.
【作者單位】： 長(zhǎng)江大學(xué)城市建設(shè)學(xué)院結(jié)構(gòu)工程與防災(zāi)研究所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51378077) 湖北省自然科學(xué)基金(創(chuàng)新群體)項(xiàng)目(2016CFA022)
【分類號(hào)】：TU528.041
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本文編號(hào)：1658121