本文選題：模型試驗(yàn) + 鋼管復(fù)合樁　； 參考：《巖土力學(xué)》2014年02期

【摘要】：依托港珠澳大橋建設(shè),通過5組不同組合的鋼管復(fù)合樁模型試驗(yàn),其中2組試件設(shè)有剪力環(huán),開展了內(nèi)置剪力環(huán)、泥皮和防腐涂層對鋼管復(fù)合樁工作性能影響的研究,比較和分析試件的荷載-變形曲線、截面變形規(guī)律、鋼管與剪力環(huán)變形等。試驗(yàn)結(jié)果表明,剪力環(huán)、泥皮和防腐涂層對鋼管復(fù)合樁的工作性能具有一定的影響;泥皮和防腐涂層使鋼管復(fù)合樁的黏結(jié)強(qiáng)度降低,而剪力環(huán)加強(qiáng)了鋼管與核心混凝土的聯(lián)結(jié),鋼管的受力及變形顯著增加。在泥皮、防腐涂層和剪力環(huán)共同作用下,樁截面變形呈"倒v"或"m"型,不再滿足經(jīng)典力學(xué)的平截面變形假定。在泥皮、防腐涂層和剪力環(huán)間距S≤2D(D為樁徑)的條件下,剪力環(huán)的嵌固作用可以完全克服泥皮和防腐涂層的不利影響。在試驗(yàn)結(jié)果研究的基礎(chǔ)上,進(jìn)一步探討泥皮、防腐涂層和剪力環(huán)不同組合下鋼管復(fù)合樁的剛度計(jì)算問題,并給出了在彈性階段范圍內(nèi)鋼管復(fù)合樁剛度計(jì)算公式,泥皮(厚度0.1 mm)和防腐涂層使其剛度降低,剪力環(huán)則使其增加。其研究結(jié)果可為鋼管復(fù)合樁基工程設(shè)計(jì)提供重要的參考。
[Abstract]:Based on the construction of HongKong-Zhuhai-Macao Bridge, through five groups of steel pipe composite pile model tests, two groups of specimens are equipped with shear ring. The influence of built-in shear ring, mud skin and anticorrosive coating on the working performance of steel pipe composite pile is studied. The load-deformation curve, the law of section deformation, the deformation of steel pipe and shear ring are compared and analyzed. The test results show that the shear ring, mud skin and anticorrosive coating have a certain influence on the working performance of steel pipe composite pile, and the adhesion strength of steel pipe composite pile is decreased by mud skin and anticorrosive coating, while the shear ring strengthens the connection between steel tube and core concrete. The stress and deformation of the steel pipe increased significantly. Under the action of mud skin, anticorrosive coating and shear ring, the cross section deformation of pile is "inverted v" or "m", which no longer satisfies the assumption of plane section deformation of classical mechanics. Under the condition that the distance between the anti-corrosion coating and the shear ring S 鈮，

本文編號：1956215