腹板开洞连续组合梁受力性能影响参数分析  

Parametric Analysis on Mechanical Behavior of Continuous Composite Beams with Web Openings

作　　者：李龙起[1] 周东华[2] 廖文远[2] 姚凯程[2] 

机构地区：[1]许昌学院土木工程学院,河南许昌461000 [2]昆明理工大学建筑工程学院,云南昆明650224

出　　处：《昆明理工大学学报（自然科学版）》2015年第2期44-51,共8页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51268022);国家青年科学基金项目(51308269)

摘　　要：为研究腹板开洞连续组合梁的承载力及受力性能,对5根腹板开洞组合梁和1根腹板无洞组合梁进行了试验研究,对7根组合梁进行了有限元模拟计算.研究的变化参数为混凝土板厚、配筋率、洞口尺寸和洞口位置.结果表明:增加混凝土板厚度可以提高组合梁的承载能力,配筋率增加能大幅提高组合梁的变形能力.随着洞口宽度和高度的增加,组合梁承载能力相应减小,带洞跨挠度增大.洞口位置对开洞组合梁的承载力和变形影响较大,洞口布置在集中荷载作用点之外对组合梁受力比较有利.另外,开洞使混凝土板承担了大部分剪力,钢梁仅承担少部分的剪力.Thirteen continuous composite beams are studied in order to investigate their mechanical behavior and load -carrying capacity.Five beams with web openings and one beam without web openings are tested under two point symmetrical concentrated static loads.Meanwhile,seven beams with web openings are simulated using the finite element package ANSYS.The main points in this paper are the concrete slab thickness and reinforcement ratio,the opening size and the location of web openings.The results show that with the increase of slab thickness and the reinforcement ratio,the load carrying capacity and the deformation capacity of beams with web openings increase,respectively.With the increase of the width and height of the hole,the load carrying capacity of the beams reduces and the deflection of web opening region increases accordingly.The results also show that the lo-cation of hole has a notable influence on the mechanical property of composite beams.Additionally,the concrete slab contributes mainly to the cross sectional total shear in the web opening region.

关 键 词：连续组合梁 腹板开洞 受力性能 承载力 参数分析 

分 类 号：TU317.1[建筑科学—结构工程] TU398.9