高层胶合木框架-混凝土核心筒结构振动台试验研究  

Shaking table test on a high-rise glulam frame-concrete core tube structure

作　　者：王明谦 许清风 冷予冰 张富文 陈溪 陈玲珠 Wang Mingqian;Xu Qingfeng;Leng Yubing;Zhang Fuwen;Chen Xi;Chen Lingzhu(Shanghai Key Laboratory of Engineering Structure Safety,Shanghai Research Institute of Building Sciences Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]上海市建筑科学研究院有限公司上海市工程结构安全重点实验室,上海200032

出　　处：《土木工程学报》2023年第12期49-58,70,共11页China Civil Engineering Journal

基　　金：国家自然科学基金(51978402);上海市青年科技英才扬帆计划(19YF1441800)。

摘　　要：为研究高层胶合木框架-混凝土核心筒结构的抗震性能,设计制作一个缩尺比例为1∶3的12层高层胶合木结构模型,并对模型开展振动台试验。试验中考虑了7度多遇至9度罕遇烈度水平,得到不同水准地震作用下模型的加速度响应、位移响应和层间剪力分布等,并基于白噪声扫频结果确定模型的动力特性。试验结果表明,高层胶合木框架-混凝土核心筒结构模型的主要破坏集中于混凝土核心筒,胶合木框架的损伤相对有限。模型具有良好的耗能能力,罕遇地震作用下模型的阻尼比均超过10%。模型的各楼层加速度放大系数在0.5~3.0,结构顶层的加速度放大系数明显高于其他楼层。7度多遇地震作用下,模型的最大层间位移角在多数工况下均能满足现行规范的规定,说明高层胶合木框架-混凝土核心筒结构具有良好的抗侧刚度。在8度~9度罕遇地震作用下,模型并未出现倒塌破坏,说明高层胶合木框架-混凝土核心筒结构能满足“大震不倒”的抗震设防目标。In order to investigate the seismic performance of high-rise glulam frame-concrete core tube structure,a 12storey high-rise glulam structural model with a scale of 1∶3 was designed,and shaking table tests were conducted on the model.Seismic intensity levels from 7 degree frequently occurrence to 9 degree rare occurrence were considered in the tests,and the acceleration response,displacement response and inter-storey shear distribution of the model under different earthquake waves were obtained.The model dynamic properties were determined based on the white noise frequency sweep results.The test results indicate that the main failure modes of the high-rise glulam frame-concrete core tube structural model were concentrated in the concrete core tube,and the damage of the glulam frame was relatively limited.The model exhibits a good energy dissipation capacity,and the damping ratio of the model under rare occurrence earthquake waves exceeds 10%.Acceleration amplification factor of each storey of the model is between 0.5 and 3.0,and the acceleration amplification factor of the top storey is notably higher than those of other storeys.Under the frequent occurrence earthquake waves of 7 degree,the maximum inter-storey drifts of the model in most cases can meet the requirements of the current code,indicating that the high-rise glulam frame-concrete core tube structure may achieve good lateral stiffness.Under the rare occurrence earthquake waves of 8 to 9 degrees,the model did not collapse,indicating that the high-rise glulam frame-concrete core tube structure can meet the seismic fortification goal of“no collapse in a large earthquake”.

关 键 词：胶合木框架 高层结构 混凝土核心筒 振动台试验 抗震性能 

分 类 号：TU366.2[建筑科学—结构工程]