Difference solution to dynamic instability of straight bars under elastic compression wave 彈性壓應(yīng)力波作用下直桿動力失穩(wěn)的差分解
Finite element eigenvalue analysis for dynamic buckling of cylindrical shells under axial elastic compression wave 軸向應(yīng)力波作用下圓柱殼彈性軸對稱動力失穩(wěn)有限元特征值分析
The finite element numerical method was used to study the dynamic buckling of cylindrical shells under elastic compression wave 摘要本文運用有限元特征值分析方法對應(yīng)力波作用下圓柱殼彈性軸對稱動力失穩(wěn)問題進(jìn)行了研究。
( 1 ) based on the experiments , this thesis discusses the stress loss of vertical prestress caused by deformation of anchorage , the resilience of the tendon and the joint compression ( l2 ) , the elastic compression of the concrete ( l4 ) and the relaxation of the tendon ( l5 ) . it is concluded that the anchorage deformation is dominated in vertical stress loss . measures are suggested to diminish the loss of the vertical prestress during the design and construction of the bridge ( 1 )本文在試驗的基礎(chǔ)上,研究了豎向預(yù)應(yīng)力筋的錨具變形、鋼筋回縮和接縫壓縮損失l2 、混凝土的彈性壓縮損失l4和力筋的應(yīng)力松弛損失l5 ,其中,第一項是最主要的損失,論文據(jù)此對設(shè)計和施工中如何減小豎向預(yù)應(yīng)力的損失提出了自己的看法和建議。
The systematical experimental study on the structure characteristic of soft clay from wenzhou has been carried out . based on schmermann and nagaraj ' s experimental conclusions and a large number of structure characteristic experiments of soft clay from wenzhou , an updated correction method of compression curve of disturbed soil is presented . the corrected compression curve is composed of four sections : horizontal section , elastic compression section , structure dilapidation compression section and normal compression section 結(jié)合溫州軟土進(jìn)行了結(jié)構(gòu)性試驗,對軟土的結(jié)構(gòu)性進(jìn)行了系統(tǒng)研究,在schmertmann和nagaraj等人實驗結(jié)論及大量溫州軟土結(jié)構(gòu)性試驗的基礎(chǔ)上,得到了結(jié)構(gòu)性軟土的四段式壓縮曲線:水平段、彈性壓縮段、結(jié)構(gòu)破損突降段,正常壓縮段。