后张法预应力混凝土工字型桩力学性能试验  

Mechanics performance test on post-stressed I-shaped concrete piles

作　　者：刘帆[1] 黄广龙[1] 徐汉东 曹亚强 

机构地区：[1]南京工业大学交通学院,江苏南京210009 [2]常州市建筑科学研究院股份有限公司,江苏常州213001

出　　处：《南京工业大学学报（自然科学版）》2014年第4期101-107,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省产学研联合创新基金(BY2012031)

摘　　要：参照有关规范、理论及试验标准,对后张法预应力混凝土工字型截面桩进行抗弯、抗剪力学性能试验,通过分析2根受弯试验桩和2根受剪试验桩在受荷过程中裂缝的开展情况,测出工字型桩抗裂弯矩、抗弯承载力、抗剪承载力实测值;同时为完善预应力工字型桩力学性能理论公式,将试验结果与预应力工字型桩力学理论计算结果进行对比,分析两者是否存在较大的偏差。结果表明:工字型桩力学性能理论计算结果与试验结果基本上一致,差异较小,可以作为工字型桩力学性能理论计算公式;预应力工字型桩相比同等类型的矩形桩和方桩在力学性能、工程应用方面均具有一定的优势,发展前景良好。Tests of bending and shear mechanics performance on post-stressed I-shaped concrete piles were conducted in accordance with relevant codes,theories and test standards. By the analysis of crack development of two piles on bending test and two the other on shear test,cracking moment,bending and shear capacities were obtained. To improve the theoretical formulas of mechanical performance of prestressed I-shaped piles. Test and theoretical results were compared to analyze the deviation. Results showed that calculation results had little difference with theoretical results,thus it could be used as calculation formula for I-shaped piles. Compared with rectangle and square pile,pre-stressed I-shaped pile had advantages in mechanicals properties and practical application,thus it had better prospect.

关 键 词：后张法 预应力 工字型桩 理论计算 性能优势 

分 类 号：TU378[建筑科学—结构工程]