有限尺寸混凝土試件允許損傷尺度的解析研究
發(fā)布時間:2019-05-19 22:02
【摘要】:該文基于允許損傷尺度的概念,應用William級數形式的裂縫尖端應力場展開式,獲得基于前三階級數的裂尖應變場,進而考慮應力松弛的影響,推導了允許損傷尺度的解析表達式。以有限尺寸的混凝土三點彎曲梁試件為例,將允許損傷尺度試驗值與該文理論值進行比較分析,分析了不同階數對應的混凝土允許損傷尺度的變化規(guī)律。結果表明:該文所提的混凝土允許損傷尺度的理論值與試驗值吻合較好;應力級數解展開至T應力項確定的允許損傷尺度大于奇異項和展開至三次高階項確定的允許損傷尺度,展開至T應力項確定的允許損傷尺度更接近試驗值。
[Abstract]:In this paper, based on the concept of allowable damage scale, the crack tip strain field based on the first third order series is obtained by using the expansion of crack tip stress field in the form of William series, and then the analytical expression of allowable damage scale is derived considering the influence of stress relaxation. Taking the finite size concrete three-point bending beam specimen as an example, the allowable damage scale test value is compared with the theoretical value in this paper, and the variation law of the allowable damage scale of concrete corresponding to different orders is analyzed. The results show that the theoretical value of the allowable damage scale of concrete proposed in this paper is in good agreement with the experimental value. The allowable damage scale determined by the expansion of the stress series solution to the T stress term is larger than that determined by the singular term and the cubic higher order term, and the allowable damage scale determined by the expansion to the T stress term is closer to the experimental value.
【作者單位】: 河北工業(yè)大學土木與交通學院;清華大學水沙科學與水利水電工程國家重點實驗室;華北水利水電大學土木與交通學院;
【基金】:國家自然科學基金項目(51309073,51209094) 清華大學水沙科學與水利水電工程國家重點實驗室開放基金項目(sklhse-2014-C-02) 高等學校博士學科點專項科研基金項目(20131317120012) 河北省自然科學基金青年基金項目(E2014202257) 河北省高等學?茖W技術研究重點項目(ZD2015028)
【分類號】:TU528
本文編號:2481101
[Abstract]:In this paper, based on the concept of allowable damage scale, the crack tip strain field based on the first third order series is obtained by using the expansion of crack tip stress field in the form of William series, and then the analytical expression of allowable damage scale is derived considering the influence of stress relaxation. Taking the finite size concrete three-point bending beam specimen as an example, the allowable damage scale test value is compared with the theoretical value in this paper, and the variation law of the allowable damage scale of concrete corresponding to different orders is analyzed. The results show that the theoretical value of the allowable damage scale of concrete proposed in this paper is in good agreement with the experimental value. The allowable damage scale determined by the expansion of the stress series solution to the T stress term is larger than that determined by the singular term and the cubic higher order term, and the allowable damage scale determined by the expansion to the T stress term is closer to the experimental value.
【作者單位】: 河北工業(yè)大學土木與交通學院;清華大學水沙科學與水利水電工程國家重點實驗室;華北水利水電大學土木與交通學院;
【基金】:國家自然科學基金項目(51309073,51209094) 清華大學水沙科學與水利水電工程國家重點實驗室開放基金項目(sklhse-2014-C-02) 高等學校博士學科點專項科研基金項目(20131317120012) 河北省自然科學基金青年基金項目(E2014202257) 河北省高等學?茖W技術研究重點項目(ZD2015028)
【分類號】:TU528
【相似文獻】
相關期刊論文 前2條
1 焦映厚;侯守武;陳照波;李明章;劉文濤;;采用波動法研究有限尺寸加肋L型板結構的振動特性[J];振動工程學報;2013年06期
2 ;[J];;年期
相關會議論文 前2條
1 張彬;楚曉亮;;部分相干高斯光束通過有限尺寸透鏡聚焦的快速分析[A];第六屆全國激光科學技術青年學術交流會論文集[C];2001年
2 李建清;莫元龍;周曉嵐;張勇;;有限尺寸宏粒子空間電荷場效應[A];中國電子學會真空電子學分會第十三屆學術年會論文集(下)[C];2001年
,本文編號:2481101
本文鏈接:http://sikaile.net/jianzhugongchenglunwen/2481101.html
最近更新
教材專著