|Table of Contents|

Effect of splicing joints on seismic performance of prefabricated RC structural nodes(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年01期
Page:
85-94
Research Field:
建筑结构
Publishing date:

Info

Title:
Effect of splicing joints on seismic performance of prefabricated RC structural nodes
Author(s):
YAN Xikang1; 2;  XIE Hanlin1;  LIANG Linxiao3;  GUO Boshen4
(1. School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China; 2. Hebei Civil Engineering Technology Research Center, Hebei University of Technology, Tianjin 300401, China; 3. School of Civil Engineering, North China Institute of Aerospace Engineering, Langfang 065000, Hebei, China; 4. China Petroleum Pipeline Engineering Corporation, Langfang 065000, Hebei, China)
Keywords:
splicing joint;  prefabricated RC structural node;  seismic performance;  low-cycle repeated load test
PACS:
TU973.2
DOI:
10.19815/j.jace.2021.10058
Abstract:
In order to study the effect of splicing joints on the seismic performance of prefabricated RC structural nodes, and to improve the seismic capacity of the structure, six node specimens were designed and produced, and the failure forms and hysteresis curves of the nodes were measured through low-cycle repeated load tests. On the basis, ABAQUS finite element software was used to analyze the influence of splicing joints on the seismic performance of different types of nodes and the optimal position of the splicing joints on the joint beams. The results show that the effect of splicing joints on the seismic performance of edge nodes is greater than that of mid-node, and the position changes of splicing joints on the beam have greater impact on the seismic performance of mid-node than that of edge node. Under the same working conditions, the peak bearing capacity of the mid-node is 30% higher than that of the edge node, and the displacement of the damage position is about 32% higher than that of the edge node, and the energy consumption capacity is significantly stronger than that of the edge node. The position change of the splicing joint on the joint beam has an impact on the node bearing capacity, stiffness degradation, ductility, and energy consumption capacity. The optimal position of the splicing joint on the beam is that the splicing joint is about 2/9 of the beam span from the core area, and the most unfavorable position is about 1/3 of the beam span from the core area. In the actual project, the position of the splicing joint should be set reasonably as far as possible. As the length of the splicing joint on the assembled node beam from the core area of the node increases, the position of the main crack of the node gradually changes from the beam end of the core area to the interface of the splicing joint.The failure mode gradually changes from bending failure at the beam end to shear failure at the beam end.

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Last Update: 2023-01-01