【作者】 田楚兴；

【导师】 秦士洪；

【作者基本信息】 重庆大学 ， 结构工程， 2008， 硕士

【摘要】 玄武岩连续纤维(CBF)是以天然玄武岩矿石为原料制作而成的纤维,具有高强度、低密度、低导热率、低吸湿率、良好的介电性、对腐蚀介质的化学稳定性和市场价格低廉等特点。为了解玄武岩纤维增强复合材料(BFRP)在整体结构中的加固效果和作用,对一个已经丧失承载力的无粘结预应力混凝土平板-异形柱整体结构模型中的协调受扭边梁和偏心受压一字柱进行了加固,通过对加固后的整体结构试件进行十六点竖向静力加载试验,研究分析了被加固构件的受力性能。结果表明,BFRP较好地发挥了作用,边梁的旧扭转裂缝受到显著的约束,新扭转裂缝出现时间大大延迟,相对原试验结果,构件的刚度得到了明显恢复;由于BFRP与构件的共同工作情况良好,未发生剥离破坏,分担了钢筋的受力,故加固构件还具有较大的承载潜力;比较显示小间距BFRP箍加固方式的效果要好一些,BFRP粘贴层数的增加将导致其强度发挥效率降低。另外,在试验研究的基础上,本文还利用考虑混凝土软化效应的斜压场空间桁架理论对边梁受扭全过程进行了分析,采用C语言编制程序,计算出各个加载阶段的扭矩和扭转角,通过与试验实测值对比分析发现,利用该理论分析所得的结果与实际结果吻合较好。最后还指出了本文研究的不足,并对后续研究工作进行了展望。更多还原

【Abstract】 Continuous Basalt Fiber (CBF) is made by crude basalt ore. The fiber has these characteristics, such as high intensity, low density, low thermal conductivity, low moisture rate, nicer dielectric properties, chemical stability to corrosion medium and low price.In order to study the effect and action of Basalt Continuous Fiber Reinforced Polymer (BFRP) strengthening in the integral structure, the compatibility torional spandrel beams and eccentricity compression“一”shaped columns of the unbonded prestressed slab-column structure model with slab and special-shaped column which has destroyed are strengthened with BFRP, through the 16-points vertical static loads tests of the strengthened monolithic structure specimen, the bearing performance of the strengthened member is studied and analyzed. The results show: BFRP play a better role, the old torsional cracks of spandrel beams are observably restricted, and the new cracks are enormously delayed the appearance time. The rigidity of the strengthened members is better recovered, compared with the former result. Because of good compatibility of BFRP and the member, BFRP has no desquamation breakage and shares in the force of reinforcing steel bar, strengthening member still have great bearing capacity. The effect of narrow space of BFRP hoop is better, the increasing layers of the BFRP can result in reduce of strength efficiency.In addition, on the basis of experiment study, in this thesis the torsional spandrel beam is analyzed with spatial truss model theory of inclined compressioneld considering concrete softening, the torsion and torsion angle per load step is calculated with the program compiled by turbo C, compared with the actual result, the result obtained with the theory can better inosculate to the actual result.At last,the disadvantages of this thesis are pointed out, and some recommendations for future research are set forth.更多还原