- 摘 要
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(清華大學(xué)土木工程系 北京 100084)
【提要】 應(yīng)用三維有限元方法分析了群樁剛性樁復(fù)合地基在地震作用下的動力反應(yīng)規(guī)律，特別是樁體的內(nèi)力反應(yīng)。計算表明，由于剛性樁復(fù)合地基中墊層的存在，樁頂內(nèi)力較樁基明顯減小，從而使整個樁身的最大內(nèi)力顯著小于樁基。但當(dāng)樁體位于分層地基，且相鄰?fù)翆幽Ａ坎町愝^大時，地震作用則會使樁體產(chǎn)生較大的內(nèi)力?！?/font>關(guān)鍵詞】 剛性樁復(fù)合地基 抗震性能 動力有限元
Earthquake Response of Rigid Pile Composite Foundation Analyzed with 3D Dynamic Finite Element Method/Liu Guanglei,Wu Siyu,Song Erxiang(Civil Engineering Department,Tsinghua University,Beijing 100084,China)
Abstract:The seismic behavior of rigid pile composite foundation is analyzed with 3D dy
namic finite element method, with attention focused on the inner force of the piles. Calculations show that due to the effect of the cushion layer in the composite foundation, the inner force at the pile top is very small, and the maximum inner force in the entire pile is also much smaller than that in the ordinary pile foundation. If the pile is installed i
n a layered soil with significant modulus difference between its adjacent layers, the inner force in the pile will increase much more under the excitation of earthquakes.
Keywords:rigid pile composite foundation； antiseismic behavior； dynamic finite elements
