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厚薄承臺界定的新方法和梁式模型法的修正
盧波1,2,過超2,戴國亮2,龔維明2
摘 要

(1 山東省日照市規(guī)劃建設(shè)委員會建設(shè)工程質(zhì)量監(jiān)督站,日照 276826;2 東南大學(xué)土木工程學(xué)院,南京 210096)
[摘要]大量的試驗(yàn)與研究結(jié)果均表明,梁式模型法適用于多樁薄承臺設(shè)計,對于厚承臺并不適用。通過對國內(nèi)外樁基承臺試驗(yàn)數(shù)據(jù)統(tǒng)計,確定空間桁架方法和梁式模型方法應(yīng)用于承臺的界限,也即如何定義“薄”承臺和“厚”承臺;并且通過對試驗(yàn)數(shù)據(jù)的數(shù)學(xué)統(tǒng)計,考慮承臺底層縱筋對抗剪和抗沖切的有利作用,對梁式模型法的沖切和剪切公式進(jìn)行了修正。
[關(guān)鍵詞]厚承臺;薄承臺;空間桁架;梁式模型
New method to define thick and thin pile caps and modification of beam model method
Lu Bo1,2, Guo Chao2, Dai Guoliang2, Gong Weiming2(1 Quality Supervision Station of Rizhao Planning and Urban Construction Committee, Rizhao 276826, China;2 College of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract:Some experiments and researches on the behavior of pile caps have been reported in literatures both at home and abroad. These reports confirmed that the beam model is not suitable for design of thick pile caps but thin pile caps. On the basis of analyzing pile cap test data, the application ranges of strut-and-tie model and beam model have been defined. Meanwhile, taking the contribution of longitudinal reinforcement to the shear strength into account, some modification to the one-way and two-way shear formulaes of the beam model method have been made.
Keywords:thick pile cap; thin pile cap; strut-and-tie model; beam model
作者簡介:盧波,博士,一級注冊結(jié)構(gòu)工程師,Email:jiacheng79@126.com。
參考文獻(xiàn)
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