【摘要】：在分析推扭荷載下群樁基礎(chǔ)工作機(jī)理的基礎(chǔ)上,根據(jù)靜力平衡條件建立了以轉(zhuǎn)心為參照點(diǎn)的各基樁位移及轉(zhuǎn)角普適方程。采用p-y曲線法與單樁扭轉(zhuǎn)剛度計(jì)算理論分別確定各基樁的水平剛度與扭轉(zhuǎn)剛度,并提出了各計(jì)算參數(shù)的取值方法。然后,建立出推扭荷載群樁內(nèi)力與位移的解算流程,編制了相應(yīng)的計(jì)算程序。與試驗(yàn)數(shù)據(jù)的對(duì)比表明,文中方法計(jì)算結(jié)果與實(shí)測(cè)結(jié)果吻合較好,且計(jì)算過(guò)程簡(jiǎn)單,具有工程實(shí)用性。最后,采用計(jì)算程序?qū)ν婆ゑ詈献饔孟氯簶痘A(chǔ)進(jìn)行了失穩(wěn)破壞分析。結(jié)果表明,當(dāng)荷載偏心距變大時(shí),同等量級(jí)荷載下群樁轉(zhuǎn)角即隨之增大,偏心距對(duì)承臺(tái)轉(zhuǎn)角的影響更明顯,而影響群樁水平位移的主要因素則是水平荷載及樁頭水平剛度。
[Abstract]:Based on the analysis of the working mechanism of pile group foundation under push-torsion load, the universal equations of pile displacement and rotation angle are established according to the static equilibrium condition. The horizontal stiffness and torsional stiffness of each pile are determined by p-y curve method and the calculation theory of torsional stiffness of single pile. Then, the calculation flow of internal force and displacement of pile group under push-torsion load is established, and the corresponding calculation program is worked out. The comparison with the experimental data shows that the calculated results are in good agreement with the measured results, and the calculation process is simple and practical. Finally, the instability failure analysis of pile group foundation under the coupled force of push and torsion is carried out by using the calculation program. The results show that when the load eccentricity increases, the pile group rotation angle increases under the same order of load, the influence of eccentricity on pile cap angle is more obvious, and the main factors affecting pile horizontal displacement are horizontal load and pile head horizontal stiffness.
【作者單位】： 長(zhǎng)沙理工大學(xué)土木與建筑學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51478051;51408066) 湖南省交通科技計(jì)劃(201014)
【分類號(hào)】：TU473.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 江曉峰;陳以一;;建筑結(jié)構(gòu)連續(xù)性倒塌及其控制設(shè)計(jì)的研究現(xiàn)狀[J];土木工程學(xué)報(bào);2008年06期

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張樹(shù)傳;謝益人;肖偉;楊瑪莎;;從汶川地震震害談建筑結(jié)構(gòu)抗連續(xù)倒塌設(shè)計(jì)方法[J];福建建筑;2009年10期

2 江曉峰;陳以一;;大跨桁架體系的連續(xù)性倒塌分析與機(jī)理研究[J];工程力學(xué);2010年01期

3 謝甫哲;舒贛平;;鋼框架連續(xù)倒塌的模擬方法研究[J];工程力學(xué);2011年10期

4 蔡建國(guó);王蜂嵐;馮健;張晉;馮飛;;大跨空間結(jié)構(gòu)連續(xù)倒塌分析若干問(wèn)題探討[J];工程力學(xué);2012年03期

5 李易;陸新征;葉列平;任愛(ài)珠;;混凝土框架結(jié)構(gòu)火災(zāi)連續(xù)倒塌數(shù)值分析模型[J];工程力學(xué);2012年04期

6 王玉銀;徐Z，

本文編號(hào)：2359178