摘要
为研究配筋率对梁抗弯性能的影响,设计并制作6根相同截面形式、不同配筋率的玄武岩纤维筋透水混凝土梁,并进行三分点加载试验,分析加载过程中试验梁正截面抗弯承载力、跨中挠度、玄武岩纤维筋与透水混凝土变形协调性及裂缝变化情况。研究结果表明,试验梁基本满足平截面假定;超筋状态是试验梁工作常态;增大玄武岩纤维筋配筋率不能有效提高试验梁开裂弯矩;试验梁正常使用极限状态发生先于承载能力极限状态,进行正截面抗弯承载力设计时,应优先以正常使用极限状态为设计准则;为保证结构设计经济性与合理性,玄武岩纤维筋透水混凝土梁正常使用极限状态应调整为跨中挠度≤L0/100、最大裂缝宽度≤1mm。
In order to study the influence of reinforcement ratio on the bending behavior of pervious concrete beams with basalt fiber reinforced bars, this paper designs and manufactures 6 pervious concrete beams with basalt fiber reinforced bars with the same cross-section and different reinforcement ratios, and the three-point loading test was carried out. This paper analyzed the bending capacity of normal section, mid-span deflection, deformation compatibility of basalt fiber reinforced bars and pervious concrete and the crack change of pervious concrete beams with basalt fiber reinforced bars during the whole loading process. The research results show that the pervious concrete beams with basalt fiber reinforced bars basically satisfies the plane section assumption. Over-reinforce is the normal state of pervious concrete beams with basalt fiber reinforced bars. Increasing the reinforcement ratio of basalt fiber reinforced bars could not effectively increase the cracking load of pervious concrete beams with basalt fiber reinforced bars. The serviceability limit state of pervious concrete beams with basalt fiber reinforced bars occurs before the ultimate limit state. When designing the bending capacity of cross section, the serviceability limit state should be given priority as the design criterion. In order to ensure the economy and rationality of the structural design, the serviceability limit state of pervious concrete beams with basalt fiber reinforced bars should be adjusted to the mid-span deflection ≤L0/100 and the maximum crack width ≤1 mm.
作者
张春东
于宝国
张鸿涛
李想
姚勇
陈代果
ZHANG Chundong;YU Baoguo;ZHANG Hongtao;LI Xiang;YAO Yong;CHEN Daiguo(Sinohydro Bureau 7 Co.,Ltd.,Chengdu,Sichuan 610213,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China;CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei,Anhui 230026,China)
出处
《施工技术（中英文）》
CAS
2021年第15期87-91,共5页
Construction Technology
基金
住房和城乡建设部科技计划(2018-K9-049,2018-K9-059)
中国水利水电第七工程局有限公司科技项目。
关键词
透水混凝土
玄武岩纤维筋
梁
抗弯性能
承载力
裂缝
pervious concrete
basalt fiber reinforced bars
beams
bending behavior
bearing capacity
cracks
