本文選題：飽和尾粉土　切入點(diǎn)：循環(huán)應(yīng)力比　出處：《巖土工程學(xué)報(bào)》2017年11期

【摘要】：為了研究累積塑性應(yīng)變?cè)鲩L(zhǎng)方式與能量耗散的關(guān)系,從機(jī)理方面進(jìn)一步細(xì)化累積塑性應(yīng)變?cè)鲩L(zhǎng)方式。基于飽和尾粉土在3種孔隙比條件下不同循環(huán)應(yīng)力比的固結(jié)不排水循環(huán)剪切試驗(yàn),改進(jìn)傳統(tǒng)能量耗散計(jì)算方法,依據(jù)塑性應(yīng)變累積能量耗散與黏滯累積能量耗散的關(guān)系對(duì)累積塑性應(yīng)變?cè)鲩L(zhǎng)方式進(jìn)行了重新分類,并從能量耗散機(jī)理上闡述累積塑性應(yīng)變的開(kāi)展。研究結(jié)果表明:隨著循環(huán)應(yīng)力比增大,黏滯累積能量耗散速率將逐漸超越塑性應(yīng)變累積能量耗散速率。將累積塑性應(yīng)變?cè)鲩L(zhǎng)形式細(xì)分為4類:穩(wěn)定型、穩(wěn)定破壞型、破壞型、和崩塌型。同時(shí)認(rèn)為塑性應(yīng)變累積能量耗散的產(chǎn)生是由于砂粒、粉粒等較大顆粒發(fā)生顆粒重排,而黏滯累積能量耗散的產(chǎn)生是由于黏粒、膠粒等較小顆粒間雙電離子層內(nèi)弱結(jié)合水發(fā)生脫離,粒間發(fā)生相對(duì)滑移。上述能量耗散機(jī)理與建立的累積塑性應(yīng)變?cè)鲩L(zhǎng)方式分類相一致,為進(jìn)一步研究累積塑性應(yīng)變模型提供研究基礎(chǔ)。
[Abstract]:In order to study the relationship between cumulative plastic strain growth mode and energy dissipation, the mechanism of cumulative plastic strain growth mode is further refined.Based on the consolidation undrained cyclic shear tests of saturated tailings under three different void ratios, the traditional calculation method of energy dissipation is improved.According to the relationship between cumulative energy dissipation of plastic strain and cumulative energy dissipation of viscous strain, the growth modes of cumulative plastic strain are reclassified, and the development of cumulative plastic strain is expounded from the mechanism of energy dissipation.The results show that the viscous cumulative energy dissipation rate will exceed the plastic strain cumulative energy dissipation rate with the increase of cyclic stress ratio.The accumulative plastic strain growth forms are divided into four types: stable type, stable failure type, failure type and collapse type.At the same time, it is considered that the generation of cumulative energy dissipation of plastic strain is due to particle rearrangement of sand and silt particles, while the cumulative energy dissipation of viscous strain is caused by clay particles.The weak bound water in the double electric ion layer is separated and the relative slippage occurs between the smaller particles such as colloidal particles.The energy dissipation mechanism mentioned above is consistent with the classification of cumulative plastic strain growth mode, which provides a basis for further study of cumulative plastic strain model.
【作者單位】： 華南理工大學(xué)土木與交通學(xué)院;華南理工大學(xué)亞熱帶建筑科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;廣東省重工建筑設(shè)計(jì)院有限公司;
【基金】：亞熱帶建筑科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室自主研究課題項(xiàng)目(2015ZC20)
【分類號(hào)】：TU43

【相似文獻(xiàn)】

相關(guān)期刊論文 前4條

1 劉曉紅;方薇;楊果林;;循環(huán)荷載下原狀結(jié)構(gòu)紅粘土累積塑性應(yīng)變模型[J];水文地質(zhì)工程地質(zhì);2013年02期

2 夏昌敬;謝和平;鞠楊;周宏偉;;沖擊載荷下孔隙巖石能量耗散的實(shí)驗(yàn)研究[J];工程力學(xué);2006年09期

3 朱澤奇;盛謙;肖培偉;劉繼國(guó);;巖石卸圍壓破壞過(guò)程的能量耗散分析[J];巖石力學(xué)與工程學(xué)報(bào);2011年S1期

4 尹土兵;李夕兵;葉洲元;宮鳳強(qiáng);周子龍;;溫 壓耦合及動(dòng)力擾動(dòng)下巖石破碎的能量耗散[J];巖石力學(xué)與工程學(xué)報(bào);2013年06期

，

本文編號(hào)：1705771