Seismic Tests and Finite Element Analysis of Joints for L-Shaped Ceramsite Concrete Composite Shear Walls
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摘要: 为了解决传统外墙保温易燃易脱落等棘手问题,提出一种陶粒混凝土L型复合剪力墙节点,可实现墙体保温和承重一体化。通过对设计的3个试件开展试验及有限元研究,重点分析了滞回及骨架曲线、承载能力、延性、耗能及残余位移等。结果表明:墙板节点属于弯剪破坏范畴;腹板脚部破坏严重,核心区损伤较轻,满足"强节点、弱构件"设计要求。延性系数是普通混凝土复合剪力墙的1.66倍,变形能力较好。黏滞阻尼系数及功比系数分别是同类墙板的4.53倍和1.87倍,耗能优势显著,有利于试件整体抗震。计算与试验结果吻合较好。通过模拟扩展分析,找到了轴压比和保温板厚度对剪力墙节点工作性能的影响规律。建议后续研究可适当提高剪力墙节点腹板边缘及脚部的材料强度、改善配筋及构造形式等,以提升或改善其工作性能。Abstract: In order to solve the thorny problems of traditional exterior wall insulation, such as flammability and easy detachment, a type of joints for L-shaped ceramic concrete composite shear walls has been proposed, which can meet the requirement of integrated wall insulation and load-bearing. The hysteresis and skeleton curves, bearing capacity, ductility, energy dissipation and residual displacement were analyzed emphatically through the experiment and finite element study of three specimens. The results showed that the wall joints belonged to the category of bending shear failure. The damage of the web foot was serious and the damage of the core area was light, which met the design requirement of "strong joint and weak member". The ductility coefficient was 1.66 times of that of ordinary concrete composite shear wall, and the deformation capacity was good. The viscous damping coefficient and work ratio coefficient were 4.53 times and 1.87 times higher than those of similar wall panels, respectively, which had significant energy consumption advantages and were beneficial for the overall seismic resistance of the specimens. The comparative analysis between the calculation and experimental results showed a good agreement. Through simulation and expansion analysis, the influence of axial compression ratio and insulation board thickness on the working performance of shear wall joints was found. It was suggested that further research should appropriately improve the material strength, reinforcement, and structural form of the edges and foots of the shear wall joint’s web plate, so as to enhance or improve its working performance.
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[1] 王翠坤,陈才华,崔明哲.我国建筑结构发展与展望[J].建筑科学,2022,38(7):1-8. [2] MA S C, HOU D F, BAO P, et al. Influence of alkali-resistant glass fiber on seismic performance of precast ceramsite concrete sandwich wall panels [J]. Structures, 2022, 38:94-107. [3] O’HEGARTY R,REILLY A,WEST R, et al. Thermal investigation of thin precast concrete sandwich panels[J]. Journal of Building Engineering,2020,27,100937. [4] 何之舟,潘鹏,王海深.夹心保温墙体GFRP连接件轴向性能研究[J].工程力学,2021,38(3):112-121. [5] XIE Y, ZHOU Q, LONG G,et al.Experimental investigation on mechanical property and microstructure of ultra-high-performance concrete with ceramsite sand [J]. Structural Concrete: Journal of the FIB, 2022, 23(4):2391-2404. [6] JOSEPH J D R, PRABAKAR J, ALAGUSUNDARAMOORTHY P. Experimental and analytical investigations on the failure modes of concrete sandwich panels under axial compression[J]. European Journal of Environmental and Civil Engineering, 2023, 27(2):733-762. [7] KINNANE O, WEST R, HEGARTY R O. Structural shear performance of insulated precast concrete sandwich panels with steel plate connectors[J]. Engineering Structures, 2020, 215,110691. [8] 邓明科,刘俊超,张阳玺,等.钢板-高延性混凝土组合低矮剪力墙抗震性能试验研究[J].工程力学,2021,38(3):40-49. [9] 张豪蕾,袁康,郭军林,等.低轴压比夹芯复合剪力墙抗震性能试验研究[J].工程抗震与加固改造,2023,45(2):28-35,42. [10] 王玉良,赵敏,郝崑,等.保温层贯通型复合剪力墙抗震性能试验研究[J].应用基础与工程科学学报,2022,30(5):1177-1187. [11] 谷倩,余纲,谭园,等.带构造边缘构件的L形双面叠合剪力墙抗震性能试验研究[J].建筑科学与工程学报,2021,38(5):47-55. [12] 刘俊雄,张品乐,杨文豪.L形高强钢筋高强混凝土短肢剪力墙抗震性能试验研究[J].地震工程与工程振动,2020,40(1):185-195. [13] 余琼,唐子鸣,张星魁,等.套筒灌浆搭接连接的L型预制剪力墙抗震试验[J].哈尔滨工业大学学报,2023,55(9):72-83. [14] 中华人民共和国住房和城乡建设部.建筑抗震试验规程:JGJ/T 101—2015[S].北京:中国建筑工业出版社,2015. [15] 冯鹏,强翰霖,叶列平. 材料、构件、结构的"屈服点"定义与讨论 [J]. 工程力学, 2017, 34 (3): 36-46. [16] 方小丹.DBJ/T15-92—2021《高层建筑混凝土结构技术规程》的修订依据及相关问题说明[J].建筑结构学报,2021,42(9):172-188. [17] 马巍,段建华,路师远,等.新型带保温层单面叠合板式剪力墙抗震性能试验研究[J].建筑科学,2021,37(9):73-79. [18] 张伟,贺晶晶,胡炜,等.高延性混凝土加固砌块砌体墙抗震性能试验及承载力研究[J/OL].工程力学,1-14[2024-08-14].http://kns.cnki.net/kcms/detail/11.2595.o3.20240612.1136.014.html. [19] 董金爽,公衍茹,黄斌,等.快速荷载交替作用下传统风格建筑双枋-柱节点试验研究[J/OL].工程科学与技术,1-14[2024-08-14].http://kns.cnki.net/kcms/detail/51.1773.tb.20240614.1722.001.html. [20] 马少春,卢天豪,鲍鹏.保温板对复合剪力墙抗震性能影响研究[J].河南大学学报(自然科学版),2022,52(1):73-81. [21] 中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2011. [22] 李健,韩广强,李峰,等.L形截面双钢板组合剪力墙受力性能有限元分析[J].工程科学与技术,2021,53(5):70-80.
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