摘要
为明确部分内填混凝土设计方案在焊接整体钢桁梁结构中的适用性,设计了2组不同混凝土填充范围的T形焊接整体节点试件,对其在水平和竖向荷载下的静力性能进行试验研究,分析了弦杆内填混凝土长度对节点刚度、应力应变分布、极限承载力、破坏模态等性能指标的影响。结果表明:与空心节点相比,弦杆内部分或完全填充混凝土之后,节点的弦杆翼板压屈破坏得到有效避免,钢板应力水平出现较明显降低,且节点的弹性刚度、屈服强度和极限强度显著提高;而部分填充混凝土方案与完全填充混凝土方案的节点力学性能则区别甚微。
To verify the application of design concept of partial concrete-filling in the integrally welded steel truss girders, two groups of T-shape partially concrete-filled and welded integral joint specimens were designed. Based on static horizontal and vertical loading tests, the influences of concrete filling length on mechanical behavior of joints, including joint stiffness, stress and strain distribution, ultimate bearing capacity, and failure modes, were thoroughly studied. The results show that after the chord has been partially or fully filled with concrete, the buckling failures of flanges of chord are avoided and the stresses in steel plates are evidently depressed. Furthermore, the stiffnesses, yield loads as well as ultimate bearing capacities of concrete-filled joints are significantly enhanced as compared with those of specimens with hollow chords; the differences between mechanical behavior of partially concrete-filled joints and fully concrete-filled ones are negligible.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2013年第3期117-123,136,共8页
China Journal of Highway and Transport
基金
上海交通大学晨星青年学者奖励计划项目(TS0330101005)
关键词
桥梁工程
钢桁梁
试验研究
整体节点
节点刚度
极限承载力
破坏模态
bridge engineering
steel truss girder
experimental research
integral joint
joint stiffness
ultimate bearing capacity
failure mode
