Seismic behavior of inter-module bolted connections with reinforcement for modular steel buildings

被引：0
|
作者：
Cao, Ke [1 ,2 ]
Zhai, Siyuan [3 ]
Wang, Weiyong [3 ]
Li, Guoqiang [4 ]
机构：
[1] School of Management Science and Real Estate, Chongqing University, Chongqing
[2] Research Center for Construction Economics and Management, Chongqing University, Chongqing
[3] College of Civil Engineering, Chongqing University, Chongqing
[4] College of Civil Engineering, Tongji University, Shanghai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 11期
关键词：
bending behavior; connection strengthening; inter-module connection; numerical simulation; quasi-static test; seismic behavior;
D O I：
10.14006/j.jzjgxb.2023.0284
中图分类号：
学科分类号：
摘要：
Module-to-module steel connections are susceptible to the module’ s beam-column weld tearing under seismic action, significantly weakening the connection’s seismic performance. To protect the beam-column weld, two strengthening methods, diagonal brace and flange strengthening, were proposed to enhance the seismic performance of the connections. To study the effects of different strengthening methods (diagonal brace strengthening, flange strengthening), bolt-hole types (circular bolt hole, dual-slot hole), connection types (corner connection, side connection), and loading methods (monotonic loading, cyclic loading) on the seismic behavior of the connections, ten full-scale connections were tested and the results were discussed in this paper. Moreover, the force-deformation characteristics, bearing capacities, rotational stiffness, ductility, and other seismic performance indexes of the connections were analyzed. An elaborated finite element model was developed and validated by the test results. Then, numerical simulations of key parameters were conducted for comparative analysis. The findings indicate that the beam-column welds in the modules of the reinforced connections exhibit negligible instances of weld tearing. The main deformation characteristics of the specimen are bending deformation and local buckling of the beam, weld tearing at the reinforcement and flange fracture. Connection stiffness properties are classified as semi-rigid. Both diagonal brace strengthening and flange strengthening connections exhibit favorable energy dissipation capacity, diagonal brace strengthening connections have higher load-carrying capacity and stiffness, but their ductility is lower than that of flange strengthening connections. The use of slotted holes hardly affects the seismic behavior of the connections. The rotational capacity and ductility of the corner and middle connections are essentially the same. Under cyclic loading, the ductility of diagonal brace and flange strengthening connections decreased by about 39. 2% and 53. 5%, respectively, compared with that of monotonic loading, but still meets the connection ductility requirements in the code for seismic design of buildings GB 50011—2010. Within the range of parameters set in the numerical simulation, the variation of the thickness of the diagonal braces has a small effect on the bearing capacity of the connections, but it increases with the increase of the welding distance of the diagonal braces. Adjusting the length of the reinforcing plate improves the load-carrying performance of the connection after reaching the yielding moment. © 2024 Science Press. All rights reserved.
引用
收藏
页码：66 / 79
页数：13
相关论文
共 35 条
  • [1] DING Yang, DENG Enfeng, ZONG Liang, Et al., State-of-the-art on connection in modular steel construction, Journal of Building Structures, 40, 3, pp. 33-40, (2019)
  • [2] FERDOUS W, BAI Y, NGO T, Et al., New advancements, challenges and opportunities of multistory modular buildings: a state-of-the-art review, Engineering Structures, 183, pp. 883-893, (2019)
  • [3] FATHIEH A, MERCAN O., Seismic evaluation of modular steel buildings, Engineering Structures, 122, pp. 83-92, (2016)
  • [4] FENG R, SHEN L, YUN Q., Seismic performance of multi-story modular box buildings, Journal of Constructional Steel Research, 168, (2020)
  • [5] Code for seismic design of buildings: GB 50011—2010, (2016)
  • [6] PENG J, CHAO H, SHEN L., Lateral resistance of multi-story modular buildings using tenon-connected inter-module connections, Journal of Constructional Steel Research, 177, (2021)
  • [7] CHEN Zhihua, FENG Yunpeng, LIU Jiadi, Et al., Research on the applicable height of column-supported modular steel building structure systems, Progress in Steel Building Structures, 23, 1, pp. 31-39, (2021)
  • [8] WANG Qinglin, SU Mingzhou, Axial compression behavior of crisscross plate-end plate joints of integrated modular steel building, Journal of Building Structures, 42, 3, pp. 163-174, (2021)
  • [9] CHEN Z, KHAN K, KHAN A, Et al., Exploration of the multidirectional stability and response of prefabricated volumetric modular steel structures, Journal of Constructional Steel Research, 184, (2021)
  • [10] CORFAR D, TSAVDARIDIS K., A comprehensive review and classification of inter-module connections for hot-rolled steel modular building systems, Journal of Building Engineering, 50, (2022)
1234