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(1 同濟(jì)大學(xué)地下建筑與工程系  上海 200092； 2 重慶交通學(xué)院河海系  400074)
【提要】  通過(guò)四根后張預(yù)應(yīng)力混凝土靠船樁的試驗(yàn)，并結(jié)合有限元分析計(jì)算，研究了張拉控制應(yīng)力、混凝土強(qiáng)度、配筋率等對(duì)靠船樁的裂縫形態(tài)、裂縫閉合性能的影響。結(jié)果表明，采用高強(qiáng)度材料的預(yù)應(yīng)力混凝土靠船樁作為碼頭的防沖設(shè)施是經(jīng)濟(jì)可行的，良好的裂縫閉合性能有助于提高靠船樁的耐久性。在試驗(yàn)和理論分析計(jì)算的基礎(chǔ)上，對(duì)預(yù)應(yīng)力混凝土靠船樁的張拉控制應(yīng)力、混凝土強(qiáng)度等提出了設(shè)計(jì)建議。
【關(guān)鍵詞】  后張預(yù)應(yīng)力  靠船樁  應(yīng)變能  試驗(yàn)研究
Test Research on Crack Resistance Properities of Poststressed Concrete Berthing Pile/Tu Zhongren1,2,Xu Xibin2(1 Department of Underground Engineering,Tongji University,Shanghai 200092,China;2 Department of River & Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
Abstract:By testing on the characteristics of four prestressed concrete berthing piles and theoretical calculations,the influence of some parameters such as initial tensile stress,strength of concrete and ratio of reinforcing bar on the berthing pile is discussed.The results show that it is economical and feasible to adop the poststressed concrete berthing pile to prevent the dock from impacting,and that the dock durability can be improved greatly.Based on the results,some suggestions for further application are given.
Keywords:prestressed concrete;berthing pile;strain energy;experimental research