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(1 重慶大學(xué)土木工程學(xué)院，重慶 400045； 2 山地城鎮(zhèn)建設(shè)與新技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室(重慶大學(xué))，重慶 400045； 3 北京國電華北電力工程有限公司，北京 100120)

［摘要］歐洲巖土工程規(guī)范Eurocode7直接法中驗(yàn)證地基和結(jié)構(gòu)構(gòu)件的破壞或過度變形時(shí)，給出了不同情況下作用力、巖土參數(shù)和反力的分項(xiàng)系數(shù)，不同的分項(xiàng)系數(shù)組合得到了三種設(shè)計(jì)方法。案例分析表明，這三種設(shè)計(jì)方法的結(jié)果有較大離散。在偏心受壓條形基礎(chǔ)和懸臂式擋土墻的設(shè)計(jì)中，活載的分布決定其分項(xiàng)系數(shù)的選擇，同時(shí)偏心的大小也影響著恒載分項(xiàng)系數(shù)的選擇；再者，荷載分布的不同，影響著巖土結(jié)構(gòu)設(shè)計(jì)是對(duì)荷載還是對(duì)巖土參數(shù)更為敏感，因此也就決定了相應(yīng)的分項(xiàng)系數(shù)和更合適的分項(xiàng)系數(shù)組合。

［關(guān)鍵詞］Eurocode7；極限狀態(tài)；設(shè)計(jì)方法；荷載；不利作用；分項(xiàng)系數(shù)選擇

中圖分類號(hào)：TU470.3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)03-0084-04

Selection of different design approaches and related partial factors in ultimate limit state in Eurocode7

Wang Guilin^1,2, Wang Jing¹, Wang Yunbin¹, Li Weike³

(1 School of Civil Engineering, Changqing University, Chongqing 400045, China; 2 Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University), Ministry of Education, Chongqing 400045, China; 3 Beijing North China Electric Power Engineering Co., Ltd., Beijing 100120, China)

Abstract:In geotechnical design by calculation，when considering a limit state of rupture or excessive deformation of a structural element or section of the ground in Eurocode7, three design approaches and relevant partial factors on actions, geotechnical parameters and resistance forces are given. According to the calculations, the results of the three design approaches are discrete. In the design of a retaining wall and the design of a strip foundation subjected to a horizontal live load and a vertical dead load, the distribution of live load determines the partial factors of itself, and the eccentricity determines the partial factors of vertical load. The difference of the distribution of loads determines that the design of geotechnical structures is more sensitive to the loading or to the geotechnical parameters, and also determines the partial factors.

Keywords:Eurocode7; ultimate limit state; design approaches; loads; unfavorable actions; determination of partial factors

*國家重大水專項(xiàng)資助項(xiàng)目(2008ZX07315-001)，重慶市科委自然科學(xué)基金項(xiàng)目(CSTC,2008BB0318)。

作者簡(jiǎn)介：王桂林，博士，副教授，Email：glw@cqu.edu.cn。

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