本文選題：群樁 + 可靠度　； 參考：《中南大學(xué)學(xué)報(bào)(自然科學(xué)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(jì)理論,給出2種極限狀態(tài)下單樁可靠度指標(biāo)間的線性關(guān)系式。并結(jié)合群樁ULS可靠度分析方法,提出群樁SLS可靠度評(píng)估方法。最后,利用試樁資料,研究樁長(zhǎng)徑比(L/D)和容許沉降(slt)對(duì)群樁SLS可靠度分析結(jié)果的影響。研究表明:L/D對(duì)群樁SLS可靠度影響顯著。無(wú)黏性土條件下,當(dāng)L/D≤10或20L/D≤30時(shí),都可取得較大的群樁SLS可靠度指標(biāo);黏性土條件下,當(dāng)20L/D≤30時(shí),可取得較大的群樁SLS可靠度指標(biāo)。隨slt的增加,估計(jì)的群樁SLS可靠度指標(biāo)逐漸增大,但增大幅度逐漸減小,特別是當(dāng)slt大于25 mm以后,隨slt的增加,群樁SLS可靠度指標(biāo)變化很小,此時(shí)承載力因素在樁基可靠度設(shè)計(jì)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(hào)：2091903