BFRP螺旋条带内约束海水海砂混凝土圆柱的轴压性能
TU375.3%TB332; 为研究以BFRP筋作为纵向增强筋、连续BFRP螺旋条带作为约束元件且带保护层的新型海水海砂混凝土圆柱的轴心受压性能,对8根短柱试件进行轴压试验,研究了BFRP纵筋配筋率和BFRP条带的宽度、间距对其轴压性能的影响;并基于试验数据推导了该类受压构件轴压承载力的计算表达式.研究结果表明:有条带约束试件的破坏过程和机理为试件高度中部混凝土保护层先剥落,然后螺旋条带断裂,随后核心混凝土压碎、纵筋屈曲,保护层剥落范围小于无条带约束试件;BFRP螺旋条带能对核心混凝土和BFRP纵筋有一定约束效应,可提高BFRP纵筋抗压强度利用率;试件抗压承载力随BFRP纵筋配筋率增大而提高;...
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| Published in | 华南理工大学学报(自然科学版) Vol. 50; no. 5; pp. 96 - 108 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004%广西大学土木建筑工程学院,广西南宁530004%广西建设职业技术学院土木工程系,广西南宁,530007%广西水利电力职业技术学院建筑工程系,广西南宁530023
01.05.2022
广西大学土木建筑工程学院,广西南宁530004 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-565X |
| DOI | 10.12141/j.issn.1000-565X.210498 |
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| Abstract | TU375.3%TB332; 为研究以BFRP筋作为纵向增强筋、连续BFRP螺旋条带作为约束元件且带保护层的新型海水海砂混凝土圆柱的轴心受压性能,对8根短柱试件进行轴压试验,研究了BFRP纵筋配筋率和BFRP条带的宽度、间距对其轴压性能的影响;并基于试验数据推导了该类受压构件轴压承载力的计算表达式.研究结果表明:有条带约束试件的破坏过程和机理为试件高度中部混凝土保护层先剥落,然后螺旋条带断裂,随后核心混凝土压碎、纵筋屈曲,保护层剥落范围小于无条带约束试件;BFRP螺旋条带能对核心混凝土和BFRP纵筋有一定约束效应,可提高BFRP纵筋抗压强度利用率;试件抗压承载力随BFRP纵筋配筋率增大而提高;条带约束可使试件承载力提高0.9% ~10.4%,极限位移增大16.39% ~130.82%;减小条带间距或增大条带宽度均能提高试件承载力;试件位移延性系数总体不高;采用文中推导的轴压承载力计算表达式得到的计算值与试验值吻合较好. |
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| AbstractList | TU375.3%TB332; 为研究以BFRP筋作为纵向增强筋、连续BFRP螺旋条带作为约束元件且带保护层的新型海水海砂混凝土圆柱的轴心受压性能,对8根短柱试件进行轴压试验,研究了BFRP纵筋配筋率和BFRP条带的宽度、间距对其轴压性能的影响;并基于试验数据推导了该类受压构件轴压承载力的计算表达式.研究结果表明:有条带约束试件的破坏过程和机理为试件高度中部混凝土保护层先剥落,然后螺旋条带断裂,随后核心混凝土压碎、纵筋屈曲,保护层剥落范围小于无条带约束试件;BFRP螺旋条带能对核心混凝土和BFRP纵筋有一定约束效应,可提高BFRP纵筋抗压强度利用率;试件抗压承载力随BFRP纵筋配筋率增大而提高;条带约束可使试件承载力提高0.9% ~10.4%,极限位移增大16.39% ~130.82%;减小条带间距或增大条带宽度均能提高试件承载力;试件位移延性系数总体不高;采用文中推导的轴压承载力计算表达式得到的计算值与试验值吻合较好. |
| Author | 陶丹 郑宏宇 江怀雁 黄志勇 郁宇琪 许迪鑫 |
| AuthorAffiliation | 广西大学土木建筑工程学院,广西南宁530004;广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004%广西大学土木建筑工程学院,广西南宁530004%广西建设职业技术学院土木工程系,广西南宁,530007%广西水利电力职业技术学院建筑工程系,广西南宁530023 |
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| Author_FL | YU Yuqi TAO Dan XU Dixin HUANG Zhiyong JIANG Huaiyan ZHENG Hongyu |
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| Keywords | BFRP纵筋 BFRP条带 圆柱试件 海水海砂混凝土 轴压性能 承载力 |
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| Snippet | TU375.3%TB332; 为研究以BFRP筋作为纵向增强筋、连续BFRP螺旋条带作为约束元件且带保护层的新型海水海砂混凝土圆柱的轴心受压性能,对8根短柱试件进行轴压试验,研究了BFRP纵... |
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| Title | BFRP螺旋条带内约束海水海砂混凝土圆柱的轴压性能 |
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