圆端形钢管微膨胀混凝土塔柱非线性接触分析  

Nonlinear contact analysis on round-ended micro-expansive concrete filled steel tubes tower-column

作　　者：易贤仁[1] 李彬[2] 卢哲安[3] 任志刚[3] 李艳[2] 

机构地区：[1]武汉理工大学理学院,湖北武汉430070 [2]武汉理工大学土木工程与建筑学院,湖北武汉430070 [3]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070

出　　处：《混凝土》2010年第1期33-36,共4页Concrete

摘　　要：采用非线性有限元接触分析方法,选择恰当的单元,定义合适的实常数和关键字,模拟钢管与混凝土相互作用,对某斜拉桥圆端形钢管微膨胀混凝土双肢塔柱进行数值模拟分析。然后,结合应力监测试验数据,与接触分析结果进行对比,结果表明采用的有限元模型和接触分析方法是合理的,在施工阶段,圆端形钢管微膨胀混凝土双肢塔柱钢管对混凝土套箍作用不明显,圆端形截面中圆弧段与矩形段结合处为黏结作用的薄弱环节。By nonlinear finite element contact analysis method, selecting appropriate units,definiting suitable real constants and KEYOPTS, simulating interaction between steel and concrete, round-ended micro-expansive concrete filled steel tubes coupled tower of a cable-stayed bridge was analysized.Then with experimental data of stress monitoring experimentation, compared with the results of contact analysis.The comparing re- suits showed that the finite element model and the method of contact analysis are reasonable.At the same time, in the construction phase, the con- finement effect of CFST of the tower was not obvious,and the adhesive effect of the junction of arc-shaped and rectangular in the round-ended cross-section was weak.

关 键 词：圆端形钢管微膨胀混凝土 双肢塔柱 接触分析 黏结作用 

分 类 号：TU528.571[建筑科学—建筑技术科学]