足尺装配式混凝土异形柱框架结构抗震性能试验研究  

Experimental study on seismic performance of full-scale fabricated concrete frame with special-shaped columns

作　　者：倪韦斌 王少杰[1] 乔德浩 吕绪亮 周满 赵立滨 NI Weibin;WANG Shaojie;QIAO Dehao;LÜXuliang;ZHOU Man;ZHAO Libin(College ofWater Conservancy and Civil Engineering,Shandong Agricultural University,Tai'an 271018,China;Shandong Mingruida New Technology Research Institute Co.Ltd,Jinan 250101,China;School of Civil Engineering,Central South University,Changsha 410083,China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]山东明睿达新技术研究院有限公司,山东济南250101 [3]中南大学土木工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2021年第10期3689-3702,共14页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划项目(2017YFE0195300);山东省自然科学基金资助项目(ZR2017BEE022);中国博士后科学基金资助项目(2017M622239)。

摘　　要：为研究装配式混凝土异形柱框架结构新民居的抗震性能,设计制作二层二跨足尺试验模型开展低周往复荷载试验。以试验研究为基础,基于原位等效代换和修正截面特性,建立适于混凝土异形柱框架结构的静力弹塑性分析简便方法。研究结果表明:装配式混凝土异形柱框架结构采用"浆锚连接+节点后浇"方案安全可靠,模型终极失效呈"强柱弱梁"破坏特征;一、二层极限位移角分别为1/25和1/48,均大于规范限值,满足"大震不倒"抗震设防要求;试验模型具有较强的承载变形与耗能能力,整体结构对应的延性系数为4.83,满足延性框架要求;中间十字节点呈"X"型剪切裂缝且损坏较严重,宜采取必要措施予以增强。研究成果为装配式混凝土异形柱框架结构在新民居中的推广应用提供了参考依据,建议适度放宽弹性层间位移角限值。In order to study the seismic performance of the new residence with assembled concrete special-shaped column frame structure, a two-story and two-span full scale test model was designed and constructed to carry out the cyclic loading experimental test. On the basis of experimental study, a simple method of static elastoplastic analysis for the frame structure of concrete special-shaped columns was established based on in-situ equivalent substitution and the modified section characteristics. The results show that it is safe and reliable to adopt the scheme of "grouted connection and the post-cast beam-column joint" in the frame structure of assembled specialshaped concrete columns, and the ultimate failure of the model is characterized by the failure of the strong column and the weak beam. The limiting displacement drifts of the first and second floor are 1/25 and 1/48, respectively,which are both larger than the standard limits and meet the requirements of "no collapsing with strong earthquake" seismic fortification. The test model has a good bearing capacity for deformation and energy consumption, and the ductility coefficient corresponding to the overall structure is 4.83, which meets the ductility framework requirements. The middle cross joint is in the shape of "X" shear crack and is seriously damaged, and so necessary measures should be taken to strengthen it. The research results provide a reference for the extension and application of the frame structure of assembled concrete special-shaped columns in the new residence, and it is suggested that the limit value of elastic interlayer drift should be relaxed moderately.

关 键 词：异形柱框架结构 装配式混凝土结构 低周往复荷载试验 浆锚连接 抗震性能 推覆分析 

分 类 号：TU375.4[建筑科学—结构工程]