蜂窝梁抗剪性能分析与计算  

PERFORMANCE ANALYSIS AND CALCULATION OF SHEAR FORCE RESISTANCE FOR CELLULAR BEAM

作　　者：贾连光[1] 李庆文[2] 刘永方[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]辽宁电力勘测设计院,辽宁沈阳110179

出　　处：《工程力学》2012年第A02期23-30,56,共9页Engineering Mechanics

基　　金：辽宁省自然科学基金项目(201102176)

摘　　要：该文对不同参数下的腹板开孔蜂窝梁抗剪性能进行分析。以试验为基础,基于有限元软件建立合理的计算模型,对不同孔型,相同孔型不同开孔率、不同翼缘尺寸的蜂窝梁进行计算,得出不同参数下蜂窝梁抗剪承载力并分析比较。结果表明:在相同开孔率及开孔数目的情况下,圆形孔蜂窝梁的抗剪极限承载力要高于六边形和矩形孔蜂窝梁;蜂窝梁翼缘宽度变化对抗剪贡献影响不大,翼缘厚度变化对其影响较大;分析发现蜂窝梁抗剪承载力受翼缘厚度、开孔率和孔型变化影响较大,给出了考虑翼缘抗剪贡献和开孔率影响的抗剪承载力简化计算公式;通过分析不同剪跨比蜂窝梁受力性能,给出弯-剪相关公式。This article made the research on the vertical shear strength of a cellular beam under different parameters. Based on the test, a reasonable finite element model is established. Through the calculation of a cellular beam of different hole types, flange sizes and opening rates, we can obtain shear bearing capacity of the cellular beam under different parameters. The results show that： in the cases of the same hole rate and hole numbers, the shear strength of the circular hole cellular beam is better than that with hexagon or rectangular holes＇; the flange width variation has little effect on shear strength, but the thickness variation has great effect on it. It was found that the simplified shear strength calculation formula considering the shear contribution and opening rate was affected by the joint action of the hole types, flange widths and opening rates. By analyzing the cellular beam stress performance of different shear span ratios, we can gain the formula for bending-shearing deformations.

关 键 词：蜂窝梁 孔型 开孔率 翼缘尺寸 抗剪承载力 弯 剪相关公式 

分 类 号：TU392[建筑科学—结构工程]