| SPECIAL TOPIC: UHPC MATERIAL AND ENGINEERING APPLICATION |
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| An Experimental Study on the Influence of Reinforced Ultra-high Performance Concrete Permanent Template to Short Column's Mechanical Property |
| YANG Yibo1, 2, YANG Kaiyue1, WU Zhihao1, LIN Shaoqun1, QIU Guanghong1, YAN Zhe1, PENG Zhangfeng1, LIN Yanzi1, GUO Wenying1, WANG Hengchang1
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1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640;
2 State Key Laboratory of Subtropical Architectures Science, South China University of Technology, Guangzhou 510640 |
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Abstract In order to enhance the concrete structure’s durability subjected to severe corrosion conditions such as splash zone, a solution was proposed which combines reinforced ultra-high performance concrete (UHPC) permanent template and core plain concrete. The mechanical influence of reinforced UHPC permanent template to short columns was investigated via axial bearing test. According to the experimental results, instead of spalling greatly and exposing concrete directly, UHPC permanent template columns displayed better integrity, only spalling slightly on UHPC’s surface and protecting the reinforcement well when destroyed. The crack bearing capacities of square and cylindrical UHPC permanent template columns reached 93% and 88% of the corresponding ultimate bearing capacities, respectively, which also exceed the ultimate bearing capacities of traditional high strength marine square/cylindrical columns with the same cross-sections and reinforcement arrangements. Considering that the effective concrete cover is one of the most crucial factors for structure durability, reinforced UHPC permanent template can improve ultimate bearing capacity, ductility, rigidity of the column, and moreover, the structure’s cracking load and cracking resistance, which effectively promoted durability and is applicable for marine projects. In comparison, cylindrical UHPC permanent template columns achieved larger mechanical improvements than square ones, and are more favorable in terms of mechanical behavior and construction convenience.
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Published: 10 December 2017
Online: 2018-05-08
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2017, Vol. 31 
