CAJ | 학술논문

针对现有格构梁内力计算方法中对梁底反力研究的不足，通过1：2比例尺的大型物理模型试验，分析研究了预应力格构梁基底反力的分布规律。分析结果表明：格构梁基底反力分布不均匀，横梁基底反力为结点大、跨中小；竖梁基底反力为上部小、下部大，呈梯形分布，且随着坡顶加载量的增加，这种趋势越加明显；预应力阶段各横梁基底反力相等，滑坡发展阶段各横梁基底反力呈上小下大梯形分布；竖梁各跨土压力均值与对应横梁均值存在一定比例关系，其比例系数范围为0.4～0.6；格构梁角结点基底反力最大，边结点次之，中结点最小，比例关系为2.15：1.15：1.00。
침대현유격구량내력계산방법중대량저반력연구적불족，통과1：2비례척적대형물리모형시험，분석연구료예응력격구량기저반력적분포규률。분석결과표명：격구량기저반력분포불균균，횡량기저반력위결점대、과중소；수량기저반력위상부소、하부대，정제형분포，차수착파정가재량적증가，저충추세월가명현；예응력계단각횡량기저반력상등，활파발전계단각횡량기저반력정상소하대제형분포；수량각과토압력균치여대응횡량균치존재일정비례관계，기비례계수범위위0.4～0.6；격구량각결점기저반력최대，변결점차지，중결점최소，비례관계위2.15：1.15：1.00。
This paper examines the deficiency in research about the contact pressure of current lattice beam internal force calculation methods.It carries out the study of a 1:2 large-scale physical model test and analyzes the distribution of foundation counterforce.The result indicates that the distribution of beam contact pressure is not uniform.For horizontal beam,the foundation counterforce near node is stronger than that in the middle segment of the beam.For vertical beam,the reaction appears to be a trapezoidal distribution with top weaker and this trend is more obvious with the loading.The contact pressure of each horizontal beam is equal in prestressing stage while it appears a distribution as the vertical beam in landslide developing stage.There is a certain proportion relationship between the span reaction of vertical beams and that of the corresponding horizontal beam span.The coefficient of proportionality is between 0.4 and 0.6.The reaction force is all different among the angle node,the edge node and the center node.It is the strongest at the angle node.The edge node comes the second.The center node weakest. Their proportions are 2.15:1.15:1.00.