南京华新城塔楼转换层铸钢节点试验研究
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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。
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 4 th floor to the 7 th 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.
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 4 th floor to the 7 th 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.
引文
[1] 舒赣平, 梁元玮, 戴雅萍. 苏州博物馆多杆相交铸钢节点试验研究与理论分析[J]. 钢结构, 2007, 22(12): 1-6.
[2] 舒赣平, 杨奔征, 左江,等. 南京金奥大厦巨型斜支撑异形铸钢节点试验研究[J]. 建筑结构, 2009, 39(8): 84-87.
[3] 王朝波, 赵宪忠, 陈以一,等. 上海铁路南站外柱异形铸钢节点承载性能研究[J]. 土木工程学报, 2008, 41(1): 18-23.
[4] 施刚, 罗翠, 王元清,等. 网壳结构十字形铸钢节点承载性能试验[J]. 建筑结构, 2010, 40(11): 5-9.
[5] 杨蔚彪, 宫贞超, 常为华,等. 中国尊大厦巨型柱分叉节点性能研究[J]. 建筑结构, 2015, 45(18): 6-12.
[6] 钢结构设计规范:GB 50017—2003 [S]. 北京: 中国计划出版社, 2003.
[7] 铸钢结构技术规程:JGJ/T 395—2017 [S]. 北京: 中国建筑工业出版社, 2017.
[8] 低合金高强度结构钢:GB/T 1591—2008 [S]. 北京: 中国标准出版社, 2009.
[9] 一般工程用铸造碳钢件:GB/T 11352—2009 [S]. 北京: 中国标准出版社, 2009.
[10] 混凝土强度检验评定标准:GB/T 50107—2010 [S]. 北京: 中国建筑工业出版社, 2010.
[11] 空间网格结构技术规程:JGJ 7—2010 [S]. 北京: 中国建筑工业出版社, 2010.
[2] 舒赣平, 杨奔征, 左江,等. 南京金奥大厦巨型斜支撑异形铸钢节点试验研究[J]. 建筑结构, 2009, 39(8): 84-87.
[3] 王朝波, 赵宪忠, 陈以一,等. 上海铁路南站外柱异形铸钢节点承载性能研究[J]. 土木工程学报, 2008, 41(1): 18-23.
[4] 施刚, 罗翠, 王元清,等. 网壳结构十字形铸钢节点承载性能试验[J]. 建筑结构, 2010, 40(11): 5-9.
[5] 杨蔚彪, 宫贞超, 常为华,等. 中国尊大厦巨型柱分叉节点性能研究[J]. 建筑结构, 2015, 45(18): 6-12.
[6] 钢结构设计规范:GB 50017—2003 [S]. 北京: 中国计划出版社, 2003.
[7] 铸钢结构技术规程:JGJ/T 395—2017 [S]. 北京: 中国建筑工业出版社, 2017.
[8] 低合金高强度结构钢:GB/T 1591—2008 [S]. 北京: 中国标准出版社, 2009.
[9] 一般工程用铸造碳钢件:GB/T 11352—2009 [S]. 北京: 中国标准出版社, 2009.
[10] 混凝土强度检验评定标准:GB/T 50107—2010 [S]. 北京: 中国建筑工业出版社, 2010.
[11] 空间网格结构技术规程:JGJ 7—2010 [S]. 北京: 中国建筑工业出版社, 2010.