钢筋混凝土框架变梁中节点特性分析  

CHARACTERISTIC ANALYSIS OF INTERIOR JOINTS OF RC FRAME WITH DIFFERENT DEPTH BEAMS

作　　者：邢国华[1] 刘伯权[1] 吴涛[1] 陆本燕[1] 

机构地区：[1]长安大学建筑工程学院,西安710061

出　　处：《工业建筑》2010年第11期47-50,共4页Industrial Construction

基　　金：国家自然科学基金项目(50608004);陕西省自然科学基金项目(2010JM7002)

摘　　要：根据10个梁高不等钢筋混凝土框架中节点试件在低周反复荷载作用下的试验结果,分析变梁中节点的破坏过程和破坏特点,重点研究左右梁高差对该类非常规节点抗震性能的影响。结果表明:左右梁高差变化对变梁中节点抗震性能影响显著,随着左右梁高差增大,梁柱组合体的剪力逐渐增大至峰值后不断降低;当左右梁高差大于1倍柱验算截面高度时,组合体宜按中间层边节点分析。在试验研究的基础上,根据节点区左、右梁高差变化与框架柱截面高度的相对关系,将钢筋混凝土框架变梁中节点划分为两类,并提出计算两类变梁节点特性的建议公式。According to the experimental investigation on ten specimens of interior joints with different depth beams under low cyclic reversed loading,the failure process and failure patterns were obtained.The experimental study was conducted that focused on the effect of vertical beam depth eccentricity on seismic behavior of the joint.Test results indicated that vertical beam depth eccentricity had an obvious effect on seismic behavior of the beam-column subassemblage.With the increasing of vertical beam depth eccentricity,the shear force of the joint increased gradually until reached its peak,and then decreased gradually;when vertical beam eccentricity was greater than the column section height,an exterior joint model would be better for this case analysis.According to the relative relation between the height of column and the vertical depth eccentricity of beam,the abnormal joints can be divided into two types,and the suggested formulas for characteristic calculation of the joints are also put forward.

关 键 词：中节点 抗震性能 变梁 特性计算 

分 类 号：TU375.4[建筑科学—结构工程]