混凝土结构钢筋构造对比分析

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发布时间：2022-02-25

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：对比研究了中国规范 GB 50010-¨2002、美国规范 ACI 318 08和欧洲规范 EN l991—1-1：2004
中钢筋锚固长度和搭接长度、受弯构件中钢筋的截断及框架梁柱节点的钢筋细部构造，分析了钢筋
强度、钢筋直径、钢筋间距、混凝土强度和保护层厚度等因素对钢筋锚固和搭接长度的影响。结果
表明：对于钢筋锚固长度，EN 1 992 1 1：20@1计算值最小，ACI 318—05简化方法的计算值最大，中
国规范的居中；对于钢筋搭接长度，在材料因素相同、钢筋搭接接头面积百分率较小的情况下，GB
50010 2002和 ACI 318 08的计算结果较 EN 1 99卜l一1：2004的要大；对于钢筋的截断，EN 1 991—
1—1：2004考虑了斜裂缝引起的钢筋拉应力的增大，钢筋截断的延伸长度较 GB 50010 …2002和
人(、I 318 08 的要大。
关键词：钢筋混凝土；钢筋；锚固长度；延伸长度；构造
中图分类号：TU375．1 文献标志码：A
Com parative Analysis of Rebar Detailing for RC Structures
ZH AN( Yuan yuan．G()NG Jin—xin
(Fm’uhy of Infrastructure Engineering，I)alian Uni x ersily of Technology，Dalian 1 1 602 4，I iaoning， China)
Abstract：Anchorage length and splicing length of rebar，CUt—off of tensile reinforcement and the
detailing of beam to column joints of frames based on GB 50010 2O02，ACI 318 08 and EN 1 992
1 1：20()t were com paratively studied． M eanw hile， the effects of the rebar st rength， rcbar
diameter-spacing OI rebars，concrete strenglh and thickness of concrete cover on anchorage an[j
splicing length calculated according tO the aforem entioned standard were ana1yzed． ReSLlhs show
that the anchorage length of rebar calculated according to EN l992—1一l：200,1 is sm a1Ier than
( hinese code and ACI code，and ACI code is the greatest． W ith regard tO the splicing length．
I)ased On the sanle materia】factors and lOW overlap ratio，calculations of Chinese c()de and ACI
c()de are greater than European code．For CUt off of tensile rebar，the developm ent length of rebar
hased on Eur(：)pean code is greater than Chinese code and ACI code as a resuh of con idering thc
increase of tensile stresses due to diagonal cracks into account．
Key words：reinforced concrele；rebar；anchorage length；developm ent length：detailing
引口
钢筋的锚同、搭接、弯起 (梁 )和俄断混凝土结构
中钢筋的主嘤构造要求是保证结构受力整体效果，
实现内力传递，保持正常的工作。山于问题的复杂
性，各国规范在混凝土受力、计算方法和考虑的影响
因素不同，对钢筋构造所做出的规定也不同，按／f 同
的规范进行处理得到的结果差别很大。为了解这些