模块化钢结构单元房承插式节点弯剪性能研究  

Bending and shear behavior of socketed joint in modular steel structure unit house

作　　者：王关朝 周凌宇[1,3] 陈浩 张明亮 王其良 彭琳娜 唐康 刘晓春 贺学军[1,3] WANG Guanchao;ZHOU Lingyu;CHEN Hao;ZHANG Mingliang;WANG Qiliang;PENG Linna;TANG Kang;LIU Xiaochun;HE Xuejun(School of Civil Engineering,Central South University,Changsha 410075,China;Hunan Construction Investment Group Co.,Ltd.,Changsha 410029,China;National Engineering Research Center of High-speed Railway Construction Technology,Central South University,Changsha 410075,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]湖南建设投资集团有限公司,湖南长沙410029 [3]高速铁路建造技术国家工程研究中心(中南大学),湖南长沙410075

出　　处：《铁道科学与工程学报》2024年第11期4663-4676,共14页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(52278231);湖南省自然科学基金资助项目(2022JJ20073);湖南建投集团科研项目(JGJTK-2022-01)。

摘　　要：为实现钢结构建筑模块化施工,提出一种新型承插式对穿螺栓连接柱-柱节点,该节点的组成构件在工厂预制,在施工现场仅需采用高强对穿螺栓拼装。通过对3个足尺节点试件进行弯剪试验,研究节点在弯剪受力状态下的受力特征、破坏模式、弯矩-转角关系及应变发展,对比节点内外套筒嵌套深度、套筒内有无注浆对节点极限承载力和初始刚度的影响。结果表明:该类节点初始转动刚度大、受弯性能好,满足欧洲规范3中刚性连接的要求,适用于钢结构模块化建筑;高强螺栓的紧固作用及内外套筒嵌套区域的“杠-撬作用”在一定程度上限制了节点域刚度发展;内套筒与端板焊接处焊缝质量和强度对节点承载性能影响较大,宜采用与钢材等强度设计;节点内外套筒嵌套深度为400 mm时,注浆与不注浆相比,初始转动刚度提高142%,承载力提高19%;承插深度减小可使节点内套筒应变发展变缓,但影响程度有限。采用ABAQUS有限元软件建立的考虑接触效应的实体单元非线性有限元模型可以很好地模拟该类节点的受力性能。进一步对该类注浆节点进行参数分析,结果表明:增加内、外套筒厚度可以提高注浆节点承载能力、初始刚度,但内套筒影响更为显著;套筒嵌套深度对注浆节点初始转动刚度和承载能力影响很小。To achieve modular construction of steel structure buildings,a new type of socket through bolts connection joint was proposed.The components of joints were prefabricated in the factory,while on the construction site only needed to use high-strength through bolts for assembly.By conducting bending shear tests on three full-scale joints,the stress characteristics,failure modes,moment-rotation curves,and stress distribution of the joints were studied.The effects of nested depth of inner and outer sleeves and the presence or absence of grouting on the ultimate bearing capacity and initial stiffness of joints were compared.The results demonstrated that this type of joints had a high initial rotational stiffness and good bending performance,meeting the requirements for rigid connections in European 3,and was suitable for modular steel structures in buildings.The tightening effect of high-strength bolts and the“level-hold effect”in the nested area of inner and outer sleeves to some extent limited the development of joints stiffness.The quality and strength of the weld seam at the welding point between the inner sleeve and the end plate had a significant impact on the load-bearing performance of the joints,and it was recommended to adopt a design with the same strength as steel.When the nested depth of the inner and outer sleeves of the joint was 400 mm,compared with no grouting,the initial rotational stiffness of joint grouting increased by 142%and the bearing capacity increased by 19%.Reducing the depth of the socket could slow down the strain development of the inner sleeve,but the impact was limited.The nonlinear finite element model of solid elements considering contact effects established using ABAQUS finite element software could effectively simulate the mechanical performance of such joints.Further parameter analysis was conducted on this type of joint.Research results show that increasing the thickness of the inner and outer sleeves can improve the bearing capacity and initial stiffness of the joint,but the

关 键 词：模块化钢结构节点 套筒注浆 对穿螺栓 试验研究 刚性连接 弯矩-转角曲线 有限元分析 

分 类 号：TU392.3[建筑科学—结构工程] TU398.9