先张法预应力高强混凝土波形板桩抗弯性能的试验研究  

Experimental Study on the Bending Behaviors of First Tensioning Prestressed High Strength Concrete Corrugated Sheet Pile

作　　者：胡少伟[1,2] 孙岳阳 范向前[1] HU Shaowei;SUN Yueyang;FAN Xiangqian(Materials & Structural Engineering Department,Nanjing Hydraulic Research Institute,Nanjing210029;Hohai University,Nanjing210024,China)

机构地区：[1]南京水利科学研究院材料结构研究所,江苏南京210029 [2]河海大学,江苏南京210024

出　　处：《华北水利水电大学学报（自然科学版）》2017年第6期9-15,共7页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家杰出青年科学基金项目(51325904);国家重大科研仪器研制项目项目(51527811);国家自然科学基金项目(51309163;51409162;51679150);水利部公益性行业专项经费项目(201501035)

摘　　要：先张法预应力高强混凝土波形板桩是一种新型的预制支护桩。为了了解这种新型桩的受力特性,采用等效截面法计算其抗裂弯矩以及抗弯极限承载力;通过3块相同截面、不同预应力筋试件的抗弯性能试验,研究了这种新型板桩的抗弯破坏现象和力学性能。结果表明:相同截面下,预应力筋根数越多,板桩的抗裂弯矩和极限抗弯弯矩越大;试验结果比等效截面计算的结果偏大,说明采用等效截面法进行结构设计是可行的,并且结构偏于安全。这也验证了等效截面法的合理性。The first tensioning prestressed high strength concrete corrugated sheet pile is a new type of precast pile.To understand mechanical properties of this new type of pile,the cracking bending moment and bending ultimate bearing capacity were calculated by equivalent section method.According to the bending performance test of three test pieces with same cross section and different prestressed reinforcement,the bending failure phenomenon and mechanical properties of this new type of sheet pile was researched,and the equivalent section method was proved to be reasonable.The results indicate that in the case of equal section areas,the bigger the area and the more the numbers of prestressed steel bars,the cracking bending moment and bending ultimate bearing capacity are greater.The test results are larger than the calculation results by equivalent section method.It is feasible to use this method to design structure and the result is in an over-conservative numeric value.

关 键 词：波形板桩 等效截面 抗裂弯矩 抗弯极限弯矩 

分 类 号：TV331[水利工程—水工结构工程] TU473[建筑科学—结构工程]