|Table of Contents|

Reinforcement layout design of RC members under complex stress states based on topological optimization(PDF)

长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2019年03期
Page:
84-95
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Reinforcement layout design of RC members under complex stress states based on topological optimization
Author(s):
ZHANG Huzhi JIANG Dian XIE Xianzhong
(School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China)
Keywords:
bridge engineering RC members under complex stress states structural optimization design topological optimization reinforcement layout design construction requirement
PACS:
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DOI:
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Abstract:
In order to obtain a suitable reinforcement design for complexstressed members, the optimal topological reinforcement layout of it was studied. The optimal topological reinforcement 〖JP2〗was obtained by applying the separatedelements model genetic evolutionary structural optimization〖JP〗 (GESO) to the reinforcedconcrete separating model. A new method for the reinforcement layout of complexstressed members was proposed. Firstly, through simplified measures such as reinforcement decomposition, connection, and merging design, the reinforcement in the topological solution was simplified and designed, and the preliminary reinforcement layout 〖HJ2mm〗drawing scheme that was substantially improved in terms of operability was obtained. Next, some local regions were reinforced to fulfill the construction requirements of the current code, and the final design of the reinforcement layout was completed. This method was applied to the reinforcement design of five different types of complexstressed members. The utilization ratios of reinforcement and mechanical properties were compared with those of the elastic stress method and empirical method,in the case of a deep beam with two small openings in each side. The results show that the separatedelements model GESO can intuitively construct the reinforcement layout of reinforced concrete complexstressed members, but the operability of construction of the scheme is lower,and the structural requirements is ignored, which leads to the lack of safety guarantee after the redistribution of elasticplastic internal forces. The simplified design results can intuitively get the concrete layout of reinforcing bars, and the simplified design of reinforcement is clear and regular arrangement.The diagonal reinforcement is greatly simplified, the operability of the construction is enhanced, the necessary structural reinforcements that meet specification requirements are added, and the design results of the reinforcement tends to be more perfect. In the case of a deep beam with two small openings in each side, the optimal topological reinforcement is simplified according to the simplified design method. After adding 7.74% of the reinforcement amount, the preliminary reinforcement drawing is obtained. After adding 26.19% of the structural reinforcement amount, the final reinforcement drawing of the simplified design method is obtained. Compared with the elastic stress design and empirical design methods, the final reinforcement drawing reduces steel consumption by 16.24% and 35.35%, respectively. It is proven that the new method with different types of members under complex stress states not only has favorable universality, stability, and feasibility, but is also more costeffective, compared with the current design method, and can serve as a reference for the reinforcement design of complexstressed members. 1 tab, 18 figs, 29 refs.

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Last Update: 2019-05-23