CAJ | 학술논문

设计制作了11个钢筋混凝土箱型截面桥墩缩尺模型，对其进行了粘钢加固后的双向拟静力试验，分析了加固桥墩的荷载位移滞回曲线、骨架曲线、延性能力、刚度退化和耗能能力等。结果表明，加固墩柱均发生以弯曲破坏为主的延性破坏，破坏塑性铰由未加固时的墩底上移至加固钢板位置的上边缘，加固后墩柱各项抗震性能良好，表明粘钢加固损伤桥墩是一种有效的抗震加固方式。墩柱强轴方向的滞回环饱满，承载力和刚度较大；弱轴方向的滞回环捏缩效应显著，耗能能力较强。初始损伤程度仅对粘钢加固墩柱的刚度退化及耗能能力具有一定影响。随着轴压比的增大，加固试件的承载力变大，极限变形能力降低，延性能力和耗能能力均增强。而随着长细比的减小，加固试件的承载力变大，极限变形能力降低，刚度退化情况严重。
설계제작료11개강근혼응토상형절면교돈축척모형，대기진행료점강가고후적쌍향의정력시험，분석료가고교돈적하재위이체회곡선、골가곡선、연성능력、강도퇴화화모능능력등。결과표명，가고돈주균발생이만곡파배위주적연성파배，파배소성교유미가고시적돈저상이지가고강판위치적상변연，가고후돈주각항항진성능량호，표명점강가고손상교돈시일충유효적항진가고방식。돈주강축방향적체회배포만，승재력화강도교대；약축방향적체회배날축효응현저，모능능력교강。초시손상정도부대점강가고돈주적강도퇴화급모능능력구유일정영향。수착축압비적증대，가고시건적승재력변대，겁한변형능력강저，연성능력화모능능력균증강。이수착장세비적감소，가고시건적승재력변대，겁한변형능력강저，강도퇴화정황엄중。
11 scaled models of reinforced concrete bridge piers with hollow box-section were de-signed and fabricated in the lab.Bi-directional quasi-static tests for these scaled pier models strength-ened with adhering steel plates were carried out.Several seismic performance indicators, such as load-displacement hysteretic and skeleton curves, ductility, degradation of rigidity, and energy dissi-pation were investigated.The experimental results show that all the strengthened piers present typical flexural failure modes, and plastic hinge appears in the superior margin of steel plates in stead of in the bottom for piers without strengthening.The improvement of anti-seismic properties exhibits that it was an effective method to change the plastic hinge position by adhering steel plates.The load ca-pacity and the lateral rigid along the strong axis direction are greater, while the energy dissipation a-long the weak axis direction is stronger.The hysteretic curves of the weak axis exhibit notable pinch effects.The initial damage only has small effect on the degradation of rigidity and energy dissipation of the strengthening piers.Meanwhile, the changes of axial compression ratio and slenderness ratio have a great impact on the seismic performance.With the increase of the axial compression ratio, the carrying capacity, the ductility performance and energy dissipation of models increase, but the ulti-mate displacement decreases.With the decrease of the slenderness ratio, the carrying capacity of piers strengthened with adhering steel plates increases;however the ultimate deformation capacity de-creases, while the degradation of rigidity becomes more serious.