Reliability - based robust design of compressive bar 壓桿穩定可靠性穩健設計
Stable reliability - based sensitivity design of compressive bar 壓桿穩定可靠性靈敏度設計
Dynamic compressive properties of fs were tested using split hopkison compressive bar 使用霍普金森壓桿測試了泡沫鋁試樣的動態壓縮性能。
Based on stable reliability - based design theory and sensitivity analysis method , research on stable reliability - based sensitivity design for compressive bar is carried out and a numerical method for reliability based sensitivity design is presented 摘要在穩定可靠性設計理論與靈敏度分析方法的基礎上,研究了壓桿穩定可靠性靈敏度設計問題。
The changing rules of reliability sensitivity are obtained and the effects of design parameters on reliability for compressive bar are studied , which provides theoretic basis for reliability design for compressive bar 提出了穩定可靠性靈敏度設計的計算方法,給出了壓桿可靠性靈敏度的變化規律,研究了設計參數的改變對壓桿穩定可靠性的影響,為壓桿穩定可靠性設計提供了理論依據。
Here the hsc of sompa is achieved through adding super - effective water reducer , fined slag and silicon fume , and decreasing the water / cement ratio . by varying the area ( spacing ) of tension bars , compressive bars , vertical links and distribution steel and embedding steel fiber and polypropylene fiber we try to improve the behaviors of reinforced high performance concrete one - way spanning slabs in bending , so that its ductility be greater than 5 . with the same arrangement of steel the width of bending member is varied to observe the effect of the width / depth ratio on the ultimate compressive strain of concrete 通過變化受拉筋含筋率和受壓筋、箍筋(鉤筋、分布筋)含量,或摻加纖維使之成為鋼纖維高強混凝土( sfrhsc )和聚丙烯纖維高強混凝土( pfrhsc ) ,對高強混凝土雙筋截面梁、板的受彎性能進行了試驗研究,試圖改善高強混凝土受彎構件的延性,使其延性比大于5 ;并在相同配筋情況下,通過變化截面寬度,研究了高強混凝土受彎構件的寬高比對壓區混凝土極限應變的影響;并對試驗構件的裂縫發展情況進行了觀測。
The research shows that : 1 ) the ductility of the hsc bending members constructed is much greater than 5 ; 2 ) increasing the vertical links and distribution steel can increase the deflection under ultimate moment ; 3 ) with appropriate compressive bars , vertical links and distribution steel the increase of moment after yield and the decrease of moment under ultimate moment can be ignored , so the ductility of the hsc bending member is much larger ; 3 ) the width / depth ratio of hsc bending member has no obvious effect on the ultimate compressive strain of concrete ; 4 ) the method used here to calculate the deflection is applicable ; 5 ) the location of crack coincides with the location of vertical links and distribution steel ; 6 ) the bending property of the hsc structure under the blast load can meet the demand of protective engineering 研究表明:本文研究的梁、板構件的延性比遠大于5 ;增加箍筋(鉤筋、分布筋)含量,可以提高壓區混凝土剝落時的撓度;在適當的受壓筋、箍筋(鉤筋、分布筋)含量下,可以忽略壓區混凝土剝落瞬間的承載力下降,從而大大提高構件的延性;受彎構件的寬高比對壓區混凝土極限應變的影響不明顯;受彎構件的裂縫間距受箍筋(鉤筋、分布筋)的布置影響;文中所用的承載力和變形計算方法是可行的。化爆試驗表明,高強混凝土構件的動載抗彎性能能夠滿足防護結構的要求。