Mechanical performance of overlap connections with grout-filled anchor reinforcements in embedded metal corrugated pipe
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(2020) 20:128
ORIGINAL ARTICLE
Mechanical performance of overlap connections with grout‑filled anchor reinforcements in embedded metal corrugated pipe Jun Chen1 · Xulin Chen1 · Fa‑xing Ding2,3 · Ping Xiang2,4 · Cai‑qian Yang1 · Yilong Liu1 · Fu Xu1 Received: 6 March 2020 / Revised: 14 July 2020 / Accepted: 15 September 2020 © Wroclaw University of Science and Technology 2020
Abstract To study the mechanical performances of a new kind of overlapping connection with grouted anchor reinforcements in embedded metal corrugated pipes, a total of 24 groups of 72 specimens were prepared and tested. The overlap connection performance of grouting anchor reinforcements in embedded metal corrugated pipes was studied by bi-directional tension test. The factors such as the diameter of anchor reinforcements, anchor length and location of reinforcements were taken into account. The results show that the bi-directional tension test method can effectively reflect the actual stress state of the overlap connection. When the connection satisfies the structural requirements, the location of the reinforcement has little influence on the anchorage performance of the connection. Under the same conditions, the failure load of the specimens will increase with the increase of the diameter of reinforcements and the anchorage length. Meanwhile, under the same conditions, the average bond stress decreases with the increase of the reinforcement diameter and the anchorage length. Experimental results and analysis show that overlap connection with grout-filled anchor reinforcements in embedded metal corrugated pipe has good anchoring performances, and also has the advantages of simple structure and convenient construction. Keywords Metal corrugated pipes · Overlap connections · Anchorage performance · Bi-directional tension test
1 Introduction The prefabricated structure is highly prominent for its great advantages in the industrialization of construction, and the bond-slip behavior of connection is of great significance in the development of this kind of structure [1, 2]. Nowadays, the connection modes applied in the assembled structure are sleeve grouting connection, slurry anchor lapped connection, * Fa‑xing Ding [email protected] * Ping Xiang pxiang2‑[email protected] 1
College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
2
School of Civil Engineering, Central South University, Changsha 410075, Hunan, China
3
Engineering Technology Research Center for Prefabricated Construction Industrialization of Hunan Province, Changsha 410075, China
4
State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
post-pouring concrete connection [3], bolt and screw connection, and welding connection [4, 5], among which traditional sleeve grouting connection is relatively common [6, 7]. However, there are also many defects, and the failure of connections and the grouting defects will directly affect the
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