摘要
碾压混凝土坝含有的大量软弱夹层的强度通常要比碾压混凝土本体强度低得多,从而使坝体稳定性在很大程度上取决于软弱夹层的强度。由于实际施工时,层间混凝土弹性模量经常波动,为此,拟定3组弹性模量及两种不同坝高,利用剪应力互等定理计算得到不同坝高、不同弹性模量碾压混凝土层间应力的变化情况,通过分析变化曲线得出,层间弹性模量相对于碾压混凝土本体弹性模量越小,坝下游部位应力集中越严重。
RCC dam has a lot of weak interlayer whose intensity usually much lower than that of RCC itself, which makes the stability of RCC dam depend largely on the intensity of those weak inter-layers. Because the elastic modulus of interlayer concrete usually waves during its construction period, we developed three sets of elastic module and two different dam height and used the reciprocal equal theorem of shear stresses to calculate the changes of RCC interlayer stresses under the conditions of different dam height and different elastic modulus. Through the analysis of change curve, we found that the less of interlayer elastic modulus Compared with that of RCC itself, the heavier of stress concentration of downstream positions of dam.
出处
《水力发电》
北大核心
2007年第3期35-36,共2页
Water Power
基金
新疆水利水电工程重点学科基金项目(xjzdxk2002-10-05)
新疆高校重点科研计划基金项目(xjedu2005i09)
关键词
弹性模量
层间应力
剪应力互等定理
碾压混凝土坝
elastic modulus
interlayer stress
reciprocal equal theorem of shear stresses
RCC dam
