模块连接节点分析设计及其剪切性能试验研究
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摘要
钢结构模块建筑是采用搭积木的方式连接而成的新型建筑形式,其中模块单元间连接节点是其关键部位.为了不影响模块单元完备的建筑功能及提高施工效率,本文提出了一种新型角件旋转式模块单元连接节点,操作简单,方便装卸.首先通过有限元分析该节点力学性能,得出该节点可按铰接进行简化设计,然后考虑不同剪切方向设计2组节点剪切试验,得到其剪切刚度及极限承载力,按照其荷载-位移曲线及传力模式,全过程可分为滑移前阶段、滑移阶段、剪切阶段、破坏阶段等4个阶段,节点最终发生角件翘曲破坏,结合试验结果,提出相应的模块单元间连接节点抗剪设计建议,为工程实践提供参考依据.
The modular steel building is a new type of structure composed of modules that are assembled as building blocks,whose inter-module connection is key to the structure.In order not to conflict with architectural function or hinder construction efficiency,an innovative rotary inter-module connection was proposed,which is easy to operate and convenient to assemble and disassemble.First,the mechanical performance of the inter-module connection was analyzed by finite element analysis;results indicated that the connection could be simplified by a pin.Then,two shear tests were conducted considering different shear directions to obtain the shear stiffness and ultimate bearing capacity.According to its load-displacement curve and the load transfer path,the entire process could be divided into four stages:pre-slip,slip,shear,and failure stage.Combined with the test results,corresponding recommendations for the rotary inter-module connection are given as a reference for relevant engineering practices.
The modular steel building is a new type of structure composed of modules that are assembled as building blocks,whose inter-module connection is key to the structure.In order not to conflict with architectural function or hinder construction efficiency,an innovative rotary inter-module connection was proposed,which is easy to operate and convenient to assemble and disassemble.First,the mechanical performance of the inter-module connection was analyzed by finite element analysis;results indicated that the connection could be simplified by a pin.Then,two shear tests were conducted considering different shear directions to obtain the shear stiffness and ultimate bearing capacity.According to its load-displacement curve and the load transfer path,the entire process could be divided into four stages:pre-slip,slip,shear,and failure stage.Combined with the test results,corresponding recommendations for the rotary inter-module connection are given as a reference for relevant engineering practices.
引文
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[2]Ferdous W,Bai Yu,Ngo T D,et al.New advancements,challenges and opportunities of multi-storey modular buildings:A state-of-the-art review[J].Engineering Structures,2019,183:883-893.
[3]Annan C D,Youssef M A,El Naggar M H.Experimental evaluation of the seismic performance of modular steel-braced frames[J].Engineering Structures,2009,31(7):1435-1446.
[4]Sanches R,Mercan O,Roberts B.Experimental investigations of vertical post-tensioned connection for modular steel structures[J].Engineering Structures,2018,175:776-789.
[5]Seungjae L,Jaeseong P,Euishin K,et al.Verification of the seismic performance of a rigidly connected modular system depending on the shape and size of the ceiling bracket[J].Materials(Basel,Switzerland),2017,10(3):16.
[6]Chen Z,Liu J,Yu Y.Experimental study on interior connections in modular steel buildings[J].Eng Struct,2017,147:625-638.
[7]Deng Enfeng,Zong Liang,Ding Yang,et al.Seismic behavior and design of cruciform bolted module-tomodule connection with various reinforcing details[J].Thin-Walled Structures,2018,133:106-119.
[8]Chen Zhihua,Li Hongxing,Chen Aoyi,et al.Research on pretensioned modular frame test and simulations[J].Engineering Structures,2017,151:774-787.
[9]Styles A J,Luo F J,Bai Y,et al.Effects of joint rotational stiffness on structural responses of multi-story modular buildings[C]//Proceedings of the International Conference on Smart Infrastructure and Construction.London,UK,2016:457-462.
[10]Gunawardena T.Behaviour of Prefabricated Modular Buildings Subjected to Lateral Loads[D].Melbourne,Australia:The University of Melbourne,2016.
[11]Doh J H,Ho N M,Miller D,et al.Steel bracket connection on modular buildings[J].Journal of Steel Structural Construction,2017,2(2):1000121-1-1000121-7.
[12]陈志华,钟旭,余玉洁,等.多层模块钢结构住宅项目关键技术及实践[J].建筑技术,2018,49(4):372-376.Chen Zhihua,Zhong Xu,Yu Yujie,et al.Key technologies and application in multi-storey modular steel residential building[J].Architecture Technology,2018,49(4):372-376(in Chinese).