墩塔钢筋部品优化设计与受弯力学性能试验研究
Optimization design of pier tower reinforcement parts and experimental study on its bending mechanical properties
胡守增 1陈林松 2郑和晖 3张龙 2张峰1
作者信息
- 1. 中交第二航务工程局有限公司,湖北 武汉 430040
- 2. 中交第二航务工程局有限公司,湖北 武汉 430040;中交公路长大桥建设国家工程研究中心有限公司,湖北 武汉 430040
- 3. 中交第二航务工程局有限公司,湖北 武汉 430040;中交公路长大桥建设国家工程研究中心有限公司,湖北 武汉 430040;交通运输行业交通基础设施智能制造技术研发中心,湖北 武汉 430040
- 折叠
摘要
为推动墩塔钢筋工业化发展,提出了3种钢筋部品构造优化设计,以主筋与箍筋连接方式、箍筋构造和有无劲性骨架为参数,开展了 2个钢筋混凝土梁的四点弯曲试验(新型钢筋部品混凝土梁简称为新型梁、传统绑扎钢筋混凝土梁简称为传统梁),研究新型墩塔钢筋部品优化设计构造的受弯力学性能.试验结果表明:传统梁相比新型梁的裂缝分布更为密集,传统梁的峰值荷载高于新型梁5％左右,传统梁的延性略高于新型梁;2个试件钢筋应变随荷载变化规律基本一致,同荷载下新型梁的箍筋应变大于传统梁50％(500 με)左右,新型梁的箍筋约束能力和持荷分担比例更高.总的来说,新型梁的抗弯力学性能与传统梁基本一致,墩塔的主箍筋焊接连接和新型箍筋构造可用于实际工程中.
Abstract
In order to promote the industrialization development of reinforcement in pier towers,three kinds of structural optimization design of reinforcement parts were proposed.Taking the connection mode of main reinforcement and stirrup,stirrup structure and stiffness skeleton as parameters,the four-point bending test of two reinforced concrete beams was carried out(the new reinforced concrete beam was referred to as the new beam,and the traditional tied reinforced concrete beam was referred to as the traditional beam),and the bending mechanical properties of the optimized design structure of the new pier tower reinforcement parts were studied.The test results show that the crack distribution of the traditional beam is denser than that of the new beam,the peak load of the traditional beam is about 5％higher than that of the new beam,and the ductility of the traditional beam is slightly higher than that of the new beam.The reinforcement strain of the two specimens is basically consistent with the variation load.Under the same load,the stirrup strain of the new beam is about 50％(500 με)larger than that of the traditional beam,and the stirrup restraint capacity and load sharing ratio of the new beam are higher.In general,the bending resistance mechanical properties of the new beam are basically the same as those of the traditional beam.The welded connection of the main stirrups of the pier tower and the new stirrup structure can be used in practical engineering.
关键词
钢筋部品/墩塔/混凝土梁/装配式Key words
reinforcement parts/pier tower/concrete beam/assembly引用本文复制引用
基金项目
中国交通建设集团有限公司揭榜挂帅课题(2021-ZJKJ-JBGS01)
出版年
2024
NETL
NSTL
万方数据