长短桩桩基础积分方程解法及其参数分析  

AN INTEGRAL EQUATION APPROACH AND PARAMETRIC ANALYSIS OF A FOUNDATION WITH LONG-SHORT-PILE

作　　者：曹明[1] 陈龙珠[1] 陈胜立[1] 郑建国 

机构地区：[1]上海交通大学土木工程系,上海200240 [2]中国联合工程公司,杭州310012

出　　处：《工业建筑》2007年第5期48-52,56,共6页Industrial Construction

基　　金：国家自然科学基金资助项目(50478022)

摘　　要：根据Muki和Sternberg的计算方法,推导出求解长短桩相互作用系数所需要的第二类Fredholm积分方程,利用叠加原理对长短桩桩基础进行计算分析。通过与常规弹性理论方法计算结果的比较发现,加筋效应对群桩的沉降以及群桩中各桩的荷载分担有明显的影响,最后对长短桩桩基础进行参数分析。分析表明,该方法可以用来分析大规模的群桩基础,具有较好的工程应用前景。Following the technique proposed by Muki ＆ Sternberg, the second kind Fredholm＇ s integral equation is deduced to solve the interaction factors between long-short piles. Using the principle of superposition a foundation with longshort piles is calculated. Compared with the results obtained using other methods by routine theory of elasticity, it shows that the strengthening effects of intervening piles on pile group settlement and individual pile load sharing are obvious. Finally, an extensive parametric analysis is made to study the foundation with long-short piles. The numerical analysis shows that the present method can be readily used to analyse large pile groups.

关 键 词：长短桩 加筋效应 相互作用系数 FREDHOLM 积分方程 

分 类 号：TU473.1[建筑科学—结构工程]