第33卷第5期 2016年9月
土木工程与管理学报 Journal of Civil Engineering and Management
黄新，张大长
（南京工业大学土木工程学院，江苏南京211816）
Vol.33 No.5 Sep.2016
摘要：本文针对Q345圆钢管在横向局部压力荷载作用下的受力性能开展了非线性有限元分析，探讨了管径、壁厚及连接板尺寸对圆钢管横向局部抗压承载力的影响规律，明确了横向荷载作用下钢管受压区的变形行为，建立了圆钢管横向局部受力的计算模型并开展了理论分析，结合有限元分析结果给出了横向抗压承载力计算公式，为实际工程应用提供参考。有限元结果表明：在横向荷载作用下，管身受压处局部凹陷，两侧的管壁向外膨胀，连接板与管身间有空隙，变形模态为六塑性钦机构：增大壁厚或连接板尺寸与管径比值都可以提高钢管横向局部抗压刚度，增强其抵抗变形的能力，提高横向局部抗压承载力。
关键词：圆钢管；非线性有限元分析；六塑性铰机构：横向局部抗压承载力：计算理论
中图分类号：TU392.3
文章编号：2095-0985(2016)05-0059-05
文献标识码：A
NumericalSimulationandCalculationTheory ofLocalCompressive
BearingCapacityof CircularSteelTubeUnderLateral Load
HUANG Xin，ZHANGDa-chang
( School of Civil Engineering, Nanjing Tech University, Nanjing 211816, China)
Abstract: In order to investigate the local compressive bearing capacity of circular steel tube( Q345) under lateral load, nonlinear finite element analysis has been carried out. The influence laws of diameter, thickness and the size of connecting plate on the lateral local compressive capacity were discussed. The deformation behavior of circular steel tube under lateral load was identified. The calculation model of steel pipe under lateral load was established and calculation theory was carried out. According to the simulated results, the formula of the local compressive bearing capacity of circular steel tube under lateral load was proposed which provides a reference for application to the project. FEM analytical results show that the displacements of circular steel tube under lateral load are local dent which finally makes side tube walls expand outward, a gap exists between connecting plate and steel pipe. The deformation mode is six-plastic-hinge framework. The increases of wall thickness and ratio of the size of connecting plate to diameter contribute greatly to the increase of lateral local compressive stiffness which enhances the capacity for resisting deformation and improves lateral local compressive capacity. Key words: circular steel tube ; nonlineer finite element analysis ; six-plastic-hinge framework ; later-
al local compressive bearing capacity; calculation theory
近年来，钢管构件凭借风阻力系数小、截面抗弯刚度大、材料各向同性、稳定性好等优点在实际工程中得到了广泛应用.范围涉及房屋建设、桥梁结构、护堤和海洋平台等工程建设领域。随着电力需求的不断增长，大容量、高电压等级输电线
收稿日期：2016-01-30修回日期：2016-03-14
路迅速发展，钢管结构也广泛应用于输电塔结构，
图1所示横向夹紧连接（如抱箍等）是圆钢管结构的一种简洁、高效连接方法，如大跨越输电塔的电梯井筒通常采用抱箍与塔架整体结构相连接。该连接方式操作简单，传力路径比较清晰，主
作者简介：黄新（1990-），男，江苏扬州人，硕士研究生，研究方向为钢结构（Email：huang_xin125@163.com）
通讯作者：张大长（1971-），男，浙江新昌人，教授，博士，研究方向为土木工程结构（Email：dczhangchina@163.com）基金项面：方数据江苏省科技厅前瞻性联合研究（BY2014005-11）