發(fā)布時(shí)間：2018-05-24 23:11

  本文選題：真三軸試驗(yàn) + 交通荷載�。� 參考：《江西理工大學(xué)》2015年碩士論文

【摘要】：在交通荷載下,土體水平方向應(yīng)力與豎直方向的應(yīng)力是循環(huán)變化的,為了更加真實(shí)地還原交通荷載下土體的動(dòng)力響應(yīng)特性,本文進(jìn)行了飽和軟黏土在循環(huán)大主應(yīng)力與循環(huán)中主應(yīng)力耦合狀態(tài)下的試驗(yàn)研究,主要內(nèi)容如下:(1)通過(guò)不同有效固結(jié)圍壓下,不同畢肖甫常數(shù)的靜力試驗(yàn),分別探討了畢肖甫常數(shù)、有效固結(jié)圍壓對(duì)飽和軟黏土的應(yīng)變、孔壓、應(yīng)力 應(yīng)變曲線、模量等的影響。(2)通過(guò)不排水條件下,不同循環(huán)大主應(yīng)力與循環(huán)中主應(yīng)力的耦合作用,探討了動(dòng)應(yīng)力比、動(dòng)荷載幅值對(duì)飽和軟黏土的永久大主應(yīng)變、永久中主應(yīng)變、最小孔壓比、應(yīng)力 應(yīng)變滯回曲線等的影響,通過(guò)對(duì)永久大主應(yīng)變發(fā)展規(guī)律的分析,得出了一個(gè)同時(shí)考慮循環(huán)中主應(yīng)力與加載周數(shù)影響的永久大主應(yīng)變經(jīng)驗(yàn)預(yù)測(cè)模型。(3)在同時(shí)施加循環(huán)大主應(yīng)力與循環(huán)中主應(yīng)力的基礎(chǔ)上,研究控制排水條件、固結(jié)圍壓、加荷頻率,影響下飽和軟黏土的動(dòng)力特性。(4)通過(guò)采用不同廣義剪應(yīng)力,不同動(dòng)應(yīng)力比的試驗(yàn),分析了這種動(dòng)應(yīng)力狀態(tài)下廣義剪應(yīng)力、動(dòng)應(yīng)力比對(duì)飽和軟黏土的動(dòng)力特性影響。
[Abstract]:Under traffic load, the horizontal stress and vertical stress of soil are cyclic, in order to restore the dynamic response of soil under traffic load more truthfully. In this paper, the experimental study of saturated soft clay under the coupling state of cyclic large principal stress and cyclic principal stress is carried out. The main contents are as follows: 1) through different effective consolidation confining pressures, the static test of different Beishaofu constants is carried out. In this paper, the effects of Beishaofu constant and effective consolidation confining pressure on strain, pore pressure, stress-strain curve and modulus of saturated soft clay are discussed respectively. The effects of dynamic stress ratio and amplitude of dynamic load on permanent large principal strain, permanent middle principal strain, minimum pore pressure ratio, stress and strain hysteretic curve of saturated soft clay are discussed. An empirical prediction model of permanent large principal strain considering the influence of principal stress and loading cycle at the same time is obtained. On the basis of applying both cyclic principal stress and cyclic principal stress, the control of drainage conditions and consolidation of confining pressure are studied. Dynamic characteristics of saturated soft clay under loading frequency. (4) the effect of generalized shear stress and dynamic stress ratio on the dynamic characteristics of saturated soft clay under different generalized shear stress and different dynamic stress ratio is analyzed by the experiments of different generalized shear stress and different dynamic stress ratio.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU435

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 谷川;王軍;張婷婷;蔡袁強(qiáng);;應(yīng)力路徑對(duì)飽和軟黏土割線模量的影響[J];巖土力學(xué);2013年12期

2 陳昌祿;邵生俊;張U，

本文編號(hào)：1930989