（1 东南大学土木工程学院， 南京 210096； 2 华东建筑设计研究总院，上海 200002;3 南京市建筑设计研究院有限责任公司， 南京 210014）

［摘要］针对南京华新城塔楼东侧中柱不能落至底部的特点，在四至七层设置跨越三层的转换层。转换层的斜柱与框架柱相交处经设计采用铸钢节点连接。铸钢节点外形不规则、受力复杂，为了验证其安全性及合理性，设计了两个1∶2缩尺节点模型并进行了三种不同工况下的静载试验，同时基于试验并利用ABAQUS建立了节点有限元模型对其进行了有限元分析。节点模型的试验值与有限元分析结果吻合良好，表明此节点有限元模型能够真实模拟节点模型的边界条件和受力状态，因此在不改变有限元模型的边界条件及荷载施加方式等计算条件的基础上，对工程实际足尺节点进行了有限元分析。结果表明：实际足尺节点能够满足设计承载能力要求，节点内填混凝土能够显著提高铸钢节点的强度与刚度，节点具有较大的安全裕量。

［关键词］铸钢节点； 转换层； 大比例缩尺节点试验； 有限元分析

中图分类号：TU391文献标识码：A文章编号：1002-848X(2018)22-0001-06

Experimental research on the cast steel joint used in the transfer floor of  a tower in Nanjing Walsin City

Zhang Yizhou1， Shu Ganping1， Liu Zhen2， Lu Jianfeng3

（1 School of Civil Engineering, Southeast University, Nanjing 210096, China；2 East China Architectural Design & Research Institute, Shanghai 200002, China；3 Nanjing Architectural Design & Research Institute Co., Ltd., Nanjing 210014, China）

Abstract:Regarding the feature that the middle columns which are located at the east side of a tower of Nanjing Walsin City cannot reach to the ground, a transfer floor that strides across three storeys is set up from the 4th floor to the 7th floor. Cast steel joints were designed and applied to connecting inclined columns of the transfer floor with frame columns. In order to verify cast steel joints′ safety and rationality owing to their irregular shape and complex mechanics performance, experimental research under static load in 3 different working conditions on 2 half-scale joint models was carried out. Meanwhile, FEM models based on the experiment were analyzed by ABAQUS. Experimental results agreed well with the results of FEM analyses, which indicates that the FEM models could truly simulate boundary condition and stress state of the actual joint. Hence,  FEM analysis on the actual full-scale joint were carried out while remaining the calculation condition such as boundary condition and load application of FEM models unchanged. The results indicate that the actual full-scale joint can meet the design requirement of bearing capacity. Moreover, concrete filled in the joint can improve the strength and stiffness of cast steel joint remarkably and the joint possesses superior safety margin.

Keywords:cast steel joint; transfer floor; reduced-scale experiment in large proportion; FEM analysis

通讯作者：舒赣平，博士，教授，博士生导师，Email：sgp0818@vip.sina.com。