内置部分中空钢箱-混凝土组合梁承载能力数值分析

Numerical Analysis of Bearing Capacity of the Internal Partial Hollow Steel Box-Concrete Composite Beam

针对传统内置钢箱-混凝土组合梁受拉区混凝土未能充分发挥作用且增加了梁自重的缺点,本文设计一种新型内置部分中空钢箱-混凝土梁,基于6根新型内置钢箱-混凝土组合梁受弯性能的非线性研究,分析了其受力过程、承载能力和变形性能等。结果表明:内置部分中空钢箱-混凝土梁可充分发挥钢与混凝土各自的力学性能,具有良好的承载能力和抗变形性能。梁构件正截面承载力可采用基于平截面假定方式设计计算,为工程实践提供依据的同时,也为大尺度预应力型钢-混凝土梁更广泛的技术应用提供设计参考。

In view of some defects that a traditional internal box-concrete composite beam does not enough play a fole and increase by self-weight,this paper designed a new type internal partial hollow steel box-concrete beam to analyze the stress process,bearing capacity and deformation performance based on the nonlinearity of the bending performances of 6 new type internal steel box-concrete composite beams.The results showed that this kind of new type internal hollow steel box-concrete composite beam could respectively present every performance and had good bearing and deformation resistance performances.The bearing capacity of the normal section could be designed based on the assumption of plane section,which could give a base for project execution,at the same time give a reference for more extensive application in large scale stress steel-concrete composite beam.