本文選題：樁基工程　切入點(diǎn)：縱橫彎曲樁　出處：《巖石力學(xué)與工程學(xué)報(bào)》2016年03期 　論文類型：期刊論文

【摘要】：為提高外露段較長(zhǎng)的樁在橫向和豎向荷載共同作用下變形和內(nèi)力的計(jì)算精度和效率,基于綜合剛度原理和雙參數(shù)法推導(dǎo)可考慮樁的縱橫彎曲,即計(jì)及豎向荷載(包括樁頂豎向力及樁身自重和樁側(cè)摩阻力)對(duì)彎曲變形影響的有限差分解,采用MATLAB程序語(yǔ)言編制相應(yīng)的計(jì)算程序。與模型試驗(yàn)數(shù)據(jù)或現(xiàn)有方法工程實(shí)例計(jì)算結(jié)果的比較驗(yàn)證了該法的可靠性,同時(shí)還表明該方法比基于相同原理的桿系有限元法更方便快捷。研究結(jié)果表明:對(duì)于外露長(zhǎng)度和樁頂豎向荷載較大的樁,重力二階效應(yīng)是不容忽視的,且豎向荷載不僅會(huì)增大樁身彎矩,還會(huì)導(dǎo)致樁身剪力的增大,現(xiàn)有方法未體現(xiàn)其對(duì)剪力的影響,是偏于不安全的,在縱橫彎曲樁的設(shè)計(jì)計(jì)算中應(yīng)引起重視。
[Abstract]:In order to improve the accuracy and efficiency of calculating the deformation and internal force of long exposed piles under the combined action of transverse and vertical loads, the longitudinal and transverse bending of piles can be considered based on the principle of comprehensive stiffness and the method of two parameters. Taking into account the finite difference decomposition of the effects of vertical loads (including the vertical force on the top of the pile, the weight of the pile body and the friction on the side of the pile) on the bending deformation, The MATLAB program language is used to compile the corresponding calculation program. The reliability of the method is verified by comparison with the model test data or the calculation results of existing engineering examples. It is also shown that the method is more convenient and faster than the finite element method based on the same principle. The results show that the second-order gravity effect can not be ignored for piles with large exposed length and vertical load on the top of the pile. The vertical load will not only increase the bending moment of the pile body, but also lead to the increase of the shear force of the pile body. The existing methods do not reflect the influence of the shear force on the shear force, so it is not safe and should be paid more attention to in the design and calculation of the longitudinal and horizontal bending pile.
【作者單位】： 福州大學(xué)巖土工程研究所;臥龍崗大學(xué)土木采礦與環(huán)境工程學(xué)院;
【分類號(hào)】：TU473.1

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本文編號(hào)：1632015