CAJ | 학술논문

双预应力梁桥的研究就是试图通过双预应力体系降低梁高,从而达到节省造价,美化景观等目的．本文通过大量的试验及研究分析,提出了双预应力梁跨中上缘获得预拉应力的新的传力锚固体系; 通过对室内双预应力混凝土小梁的研究,检测了预压钢筋的受力性能和预压过程中的某些影响参数; 提出了足尺梁计算方法和截面、跨径选择方法; 研制了新型哑铃型波纹管,很好地解决了预压钢筋变形、摩阻损失和管道压浆之间的矛盾; 通过对30?m足尺梁的设计、施工、试验及观测,进一步完善了对施工工艺的研究,并对所取得的成果进行了验证．
쌍예응력량교적연구취시시도통과쌍예응력체계강저량고,종이체도절성조개,미화경관등목적．본문통과대량적시험급연구분석,제출료쌍예응력량과중상연획득예랍응력적신적전력묘고체계; 통과대실내쌍예응력혼응토소량적연구,검측료예압강근적수력성능화예압과정중적모사영향삼수; 제출료족척량계산방법화절면、과경선택방법; 연제료신형아령형파문관,흔호지해결료예압강근변형、마조손실화관도압장지간적모순; 통과대30?m족척량적설계、시공、시험급관측,진일보완선료대시공공예적연구,병대소취득적성과진행료험증．
The objective of the research is to reduce the beam’s depth by bi-prestress in order to save money and beautify landscape. A new anchorage system for girder to obtain pretension stress at section top-edge in middle of span is shown. Based on the research of bi-prestressing beams inside test-room and the test of the prestress bar character, method for calculating the full size gird and choosing section(or span) are proposed. A new-style corrugated pipe which is shown in the paper is used, to solve the transformation of compressed thread bar and the contradiction between loss of friction resistance and pumping in pipe. The results of research are validated by the design, construction, test and observation of 30 meters full size gird, and the construction method are improved.