考虑尺寸效应的RC梁-柱节点抗剪承载力计算方法研究
Study on calculation method for shear capacity of RC beam-column joint considering size effect
金浏 1万顺寅 1李冬 1苗丽越 1杜修力1
作者信息
- 1. 北京工业大学城市减灾与防灾防护教育部重点实验室,北京 100124
- 折叠
摘要
依据《混凝土结构设计规范》(GB 50010-2010)设计的RC梁-柱节点,其抗剪承载力安全储备随节点尺寸增大而显著降低,这主要是因为节点名义抗剪强度的尺寸效应.首先,基于不同因素对节点名义抗剪强度及其尺寸效应行为的影响规律分析,建立了综合考虑节点配箍率、轴压比及混凝土强度影响的RC梁-柱节点名义抗剪强度尺寸效应公式.然后,通过引入尺寸效应系数,提出了针对《混凝土结构设计规范》(GB 50010-2010)中RC梁-柱节点抗剪承载力计算公式的修正建议.与相关试验数据对比分析表明:基于修正公式设计RC梁-柱节点的抗剪承载力可有效改善大尺寸节点的安全储备.
Abstract
The safety stock of shear capacity of RC beam-column joints designed according to the Code for design of concrete structures(GB 50010-2010)decreases significantly with the increase of joint size,which is mainly due to the size effect of nominal shear strength of the joint.Firstly,based on the analysis of the influence of different factors on the nominal shear strength and size effect behavior of RC beam-column joint,a size effect formula of nominal shear strength of RC beam-column joint was established considering the influence of stirrup ratio,axial compression ratio and concrete strength of joint synthetically.Furthermore,by introducing the size effect coefficient,a suggestion for revising the calculation formula of shear capacity of RC beam-column joint in the Code for design of concrete structures(GB 50010-2010)were put forward.Compared with relevant test data,it is shown that the shear capacity of RC beam-column joint designed based on the modified formula can effectively improve the safety stock of large joint.
关键词
钢筋混凝土梁-柱节点/抗剪承载力/尺寸效应/修正建议/安全储备Key words
reinforced concrete beam-column joint/shear capacity/size effect/revision suggestion/safety stock引用本文复制引用
出版年
2024
NETL
NSTL
万方数据