關(guān)于設(shè)防烈度地震和罕遇地震下建筑樁基礎(chǔ)豎向承載力的探討
古今強(qiáng)
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（奧雅納工程咨詢（上海）有限公司深圳分公司，深圳 518048）[摘要] 基于中震或大震分析的性能化抗震設(shè)計逐漸增多，而現(xiàn)行規(guī)范僅有非抗震和小震工況的樁基豎向承載力驗算規(guī)定。為此本文分析了現(xiàn)行規(guī)范中樁基豎向承載力驗算的安全度，討論了建筑樁基的抗震設(shè)防目標(biāo)，提出了以“安全系數(shù)”為目標(biāo)的中震、大震下樁基豎向承載力驗算簡化方法，供進(jìn)一步研究和探討。[關(guān)鍵詞] 樁基豎向承載力;性能化抗震設(shè)計;設(shè)防烈度地震;罕遇地震;承載力安全系數(shù)中圖分類號：TU473.1 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2013)S1-0872-04Discussion on vertical bearing capacity of building pile foundation under fortification or severer earthquakesGu Jinqiang(Shenzhen Branch,Arup International Consultants (Abstract: While performance based seismic design taking into account of fortification or severer earthquake impact, is getting prevalent for large scale or complex building structures, discussion is necessary on how to verify the adequacy of vertical bearing capacity of building pile foundation under fortification or severer earthquakes for such projects, as current codes of practice only provide design guidance on verification of pile bearing capacity under frequent earthquakes. In this paper, provisions of curent codes of practice are reviewed in regard to factor of safety for pile bearing capacity, seismic fortification objectives are discussed for building pile foundations, simplified method with criterion on factor of safety is recommended for justification of vertical bearing capacity of building pile foundation under fortification or severer earthquakes.Keywords: vertical bearing capacity of pile;performance based seismic design;fortification earthquake;severer earthquake;factor of safety for bearing capacity作者簡介：古今強(qiáng)，高級工程師，注冊土木工程師（巖土），一級注冊結(jié)構(gòu)工程師，英聯(lián)邦結(jié)構(gòu)工程師（MISructE），Email: jin-qiang.gu@arup.com。
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