CAJ | 학술논문

通过对典型枓栱的模型的低周反复荷载试验,研究了枓栱侧向刚度的退化规律.试验得出枓栱的力-位移滞回曲线及骨架曲线,并拟合出了力-位移的关系方程和枓栱恢复力模型,由试验结果给出枓栱侧向刚度的线性变化.通过试验得出以下主要结论:枓栱以水平滑移变形为主,并通过摩擦滑移起到耗能、隔振的效果;枓栱的滞回曲线呈平行四边形,形状饱满外包络面积大,说明枓栱具有良好的滞回耗能特性;枓栱的力学模型属于线性强化弹塑性模型.恢复力模型反应了枓栱恢复力特性及刚度变化规律,适应于同类木结构的静力传递和结构动力分析计算研究.研究结果为古建筑的抗震性能研究和修缮加固提供了理论基础.
통과대전형두공적모형적저주반복하재시험,연구료두공측향강도적퇴화규률.시험득출두공적력-위이체회곡선급골가곡선,병의합출료력-위이적관계방정화두공회복력모형,유시험결과급출두공측향강도적선성변화.통과시험득출이하주요결론:두공이수평활이변형위주,병통과마찰활이기도모능、격진적효과;두공적체회곡선정평행사변형,형상포만외포락면적대,설명두공구유량호적체회모능특성;두공적역학모형속우선성강화탄소성모형.회복력모형반응료두공회복력특성급강도변화규률,괄응우동류목결구적정력전체화결구동력분석계산연구.연구결과위고건축적항진성능연구화수선가고제공료이론기출.
Experiment on the typical model of Dougong was carried out under low cyclic reversed loading to study the lateral stiffness degradation law of Dougong. Force-displacement hysteretic loops and skeleton curves of Dougong were obtained to fit out the force-displacement equation and resilience model of Dougong. Energy dissipation caused by frictional slippage is an important reason for the excellent seismic behavior of cuch ancient wooden structure. Hysteretic loops of Dougong assume to be of the parallelogram-type. Experiment agrees with theoretic analysis and the plump area of hysteretic loop accounts for its excellent energy dissipation performance. The mechanic model of Dougong belongs to linear strengthened elastic-plastic model. Both the fitting equation of force-displacement and resilience model reflect the changes in stiffness of Dougong, and adapt to the research on static load delivery as well as dynamic structural analysis and calculation of similar wooden structure. This provides a theoretical basis for the study on the seismic performance, remedy and strengthening of ancient wooden structures. The result of test provides a theoretical basis for seismic performance studying and reinforcement repairing for Chinese historic buildings.