CAJ | 학술논문

为了研究纵筋率对高强钢筋活性粉末混凝土梁的斜向开裂荷载、斜裂缝宽度及抗剪承载力的影响，通过对3根纵筋率不同的高强钢筋活性粉末混凝土梁抗剪试验，分析梁在集中荷载作用下的破坏形态，研究纵筋率对斜向开裂荷载、斜裂缝宽度及抗剪承载力的影响。运用桁架—拱模型公式对试验数据进行了分析，并将试验值与《混凝土结构设计规范》(GB50010-2010)公式计算值进行比对研究。结果表明：试验梁的抗剪承载力与纵筋率之间呈现一定的线性关系，随着纵筋率的提高而提高，纵筋率由4.43%提高到6.39%和8.04%时，极限荷载提高了18.6%和19.3%；纵筋率对开裂荷载的影响较小，纵筋处裂缝宽度明显减小；按现行规范公式计算的高强钢筋活性粉末混凝土( RPC)梁抗剪承载力与试验实测值存在较大差异。
위료연구종근솔대고강강근활성분말혼응토량적사향개렬하재、사렬봉관도급항전승재력적영향，통과대3근종근솔불동적고강강근활성분말혼응토량항전시험，분석량재집중하재작용하적파배형태，연구종근솔대사향개렬하재、사렬봉관도급항전승재력적영향。운용항가—공모형공식대시험수거진행료분석，병장시험치여《혼응토결구설계규범》(GB50010-2010)공식계산치진행비대연구。결과표명：시험량적항전승재력여종근솔지간정현일정적선성관계，수착종근솔적제고이제고，종근솔유4.43%제고도6.39%화8.04%시，겁한하재제고료18.6%화19.3%；종근솔대개렬하재적영향교소，종근처렬봉관도명현감소；안현행규범공식계산적고강강근활성분말혼응토( RPC)량항전승재력여시험실측치존재교대차이。
In order to study the effect of longitudinal reinforcement ratio on the diagonal cracking load, diagonal crack width and shear capacity of high strength reinforced Reactive Powder Concrete ( RPC) beams, a shear test was carried out on three simply supported beams of different longitudinal reinforcement ratios, and the failure patterns of the beams under concentrated load were analyzed. The formula of truss arch model was used to analyze the test data, and the test values were compared with the calculated values given by the formula of Code for Design of Concrete Structures ( GB50010-2010 ) . The results show that the shear capacity of the test beams has a certain linear relationship with the longitudinal reinforcement ratio, and it increases with the increase of the longitudinal rein-forcement ratio. When the longitudinal reinforcement ratio is increased from 4. 43% to 6. 39% and 8. 04%, the ultimate load is increased by 18. 6% and 19. 3%, respectively. The influence of longitu-dinal reinforcement ratio on the cracking load is small, and the crack width decreased obviously near the longitudinal reinforcement. There is a large difference between the calculated value of shear ca-pacity which is obtained according to the formula of current specification and the experimental value.