摘要
用于异形柱框架结构的各种截面型式的多腔钢-混凝土组合柱具有良好的使用功能和可装配建造性能,与异形柱面外有侧肢不同,保证矩形截面壁式柱弱轴方向的抗震性能更为重要。为了探究多腔钢-混凝土组合壁式柱弱轴方向的抗震性能与受力机制,运用低周往复荷载试验与有限元分析相结合的方法开展研究。结果表明:压弯荷载作用下,多腔钢-混凝土组合壁式柱弱轴方向的滞回曲线饱满,其全过程受力可划分为稳定承载、转化过渡和峰后二阶效应显现三个阶段,试件对应的两个特征分界点的层间位移角分别为1/57和1/27;试件屈服点和失效破坏点对应的层间位移角分别为1/85和1/23,均大于规范限值,延性系数为3.73;两端钢管、中间钢板和腔内混凝土可协同受力,混凝土未见明显压碎和开裂,钢管和钢板未见明显损伤;所得有限元模拟结果与试验结果吻合度高,骨架曲线平均相对误差为4.6%。上述成果深化了对多腔钢-混凝土组合壁式柱弱轴方向抗震性能的认知,为工程应用提供了参考。
Multi-cavities steel-concrete composite columns(MSCC)of various cross-section types are used in special-shaped column frame structure to provide good functional and assemblable construction performance,unlike special-shaped columns with lateral limbs,it is more important to ensure the seismic performance of rectangular section columns in the weak-axis.To investigate the seismic performance and mechanical mechanism of rectangular MSCC in weak-axis,a combination of the low-cyclic loading test and finite element analysis is used to carry out the research.The results show that the hysteretic curve in the weak-axis of the rectangular MSCC under compression-bending load is full,and the whole process can be divided as stable bearing,transformation transition and post-peak second-order effect,and the story drift of the two feature cut-off points of the specimen in above three stages are 1/57 and 1/27 respectively.The story drift of the specimen at the yield and failure damage point are 1/85 and 1/23 respectively,which are greater than the code limits.The ductility coefficient is 3.73.The steel tube at both ends,the steel plate in the middle and the concrete in the cavity can work together,and no obvious crushing and cracking to the concrete,no obvious damage to the steel tube and the steel plate.The obtained finite element simulation results are in good agreement with the test results,and the average relative error of the skeleton curves is 4.6%.The above results can deepen the knowledge of the seismic performance of rectangular MSCC in the weak-axis and provide a reference for engineering application.
作者
孙宏宇
郑宝磊
王少杰
李辉
徐宗美
SUN Hongyu;ZHENG Baolei;WANG Shaojie;LI Hui;XU Zongmei(College of Water Conservancy and Civil Engineering,Shandong Agricultural University,Tai’an 271018,China;Shandong Jianzhu University Design Group Co.Ltd.,Jinan 250101,China)
出处
《世界地震工程》
北大核心
2024年第1期118-126,共9页
World Earthquake Engineering
基金
国家自然科学基金(32272008)
山东省科技型中小企业创新能力提升工程项目(2023TSGC0818)。
