本文選題：群樁 + 可靠度　； 參考：《中南大學學報(自然科學版)》2016年11期

【摘要】：考慮樁正常使用極限狀態(tài)(SLS)和承載能力極限狀態(tài)(ULS)模型不確定性,利用概率統(tǒng)計理論,給出2種極限狀態(tài)下單樁可靠度指標間的線性關系式。并結合群樁ULS可靠度分析方法,提出群樁SLS可靠度評估方法。最后,利用試樁資料,研究樁長徑比(L/D)和容許沉降(slt)對群樁SLS可靠度分析結果的影響。研究表明:L/D對群樁SLS可靠度影響顯著。無黏性土條件下,當L/D≤10或20L/D≤30時,都可取得較大的群樁SLS可靠度指標;黏性土條件下,當20L/D≤30時,可取得較大的群樁SLS可靠度指標。隨slt的增加,估計的群樁SLS可靠度指標逐漸增大,但增大幅度逐漸減小,特別是當slt大于25 mm以后,隨slt的增加,群樁SLS可靠度指標變化很小,此時承載力因素在樁基可靠度設計中起決定作用。
[Abstract]:Considering the uncertainty of the limit state of pile (SLS) and the limit state of bearing capacity (ULS), the linear relationship between the reliability index of the two kinds of limit states is given by using the theory of probability and statistics. Combined with the ULS reliability analysis method of pile group, the SLS reliability evaluation method of pile group is put forward. Finally, the effects of L- / D ratio and allowable settlement (slt) on the reliability analysis of pile groups are studied by means of pile test data. The results show that the effect of W / L / D on the SLS reliability of pile group is significant. When L / D 鈮，

本文編號：2091903