钢纤维轻骨料混凝土细观均匀化及受扭构件极限承载力研究

摘要/Abstract

摘要： 钢纤维轻骨料混凝土(SFLWC)因自重轻、耐热性好等优点,在土木工程中应用愈加广泛。由于其本质为多相复合材料,力学性能试验结果离散性大且试验费时耗力,因此采用细观均匀化理论预测其力学性能是有效方法之一。本文运用Mori-Tanaka均匀化理论,预测钢纤维体积掺量为0%、0.5%、1%、1.5%时钢纤维轻骨料混凝土的弹性模量,并以此为基础进行了钢纤维轻骨料混凝土的抗扭性能有限元分析,对受扭构件极限承载力经验计算公式提出修正建议。结果表明,均匀化理论得到的弹性模量预测值与规范中经验公式计算结果误差很小且与试验结果吻合很好,通过有限元计算得到的钢纤维轻骨料混凝土梁扭转曲线与相关试验结果符合较好,本文建议的极限扭矩计算修正公式与试验结果相比较为一致,故建议的修正公式对工程计算和应用有一定的实际参考价值。

关键词: 钢纤维轻骨料混凝土, Mori-Tanaka均匀化理论, 有限元分析, 纤维掺量, 极限扭矩

Abstract: Due to the advantages of light weight and excellent heat resistance, steel fiber lightweight aggregate concrete (SFLWC) is increasingly used in civil engineering. Considering the SFLWC is a multiphase composite material in nature, and the mechanical performance test results are highly discrete and the test is time-consuming and labor-intensive, the application of microscopic homogenization theory to predict its mechanical properties is considered to be one of the effective methods. Based on the Mori-Tanaka homogenization theory, this paper predicted the elastic modulus of steel fiber lightweight aggregate concrete when the steel fiber volume content is 0%, 0.5%, 1%, and 1.5%. And on that basis, it carried out torsion finite element calculations on steel fiber lightweight aggregate concrete beams, and proposed amendments to the empirical calculation formula for the ultimate bearing capacity of torsion components. The results show that the predicted value of elastic modulus obtained by the homogenization theory had little error with the calculation result of the empirical formula in the specification, and it is in good agreement with the test results. The torsion curve of steel fiber lightweight aggregate concrete beam obtained by finite element calculation accorded with the relevant test results to a high degree. The calculation and correction formula of the limit torque proposed in this paper is relatively consistent with the test results. Therefore, the proposed correction formula has been verified to be of certain practical reference value for engineering calculation and application.

Key words: steel fiber lightweight aggregate concrete, Mori-Tanaka homogenization theory, finite element analysis, fiber volume fraction, ultimate torque

中图分类号:

TU528

王辉明, 贺正波, 朱文. 钢纤维轻骨料混凝土细观均匀化及受扭构件极限承载力研究[J]. 硅酸盐通报, 2021, 40(10): 3376-3384.

WANG Huiming, HE Zhengbo, ZHU Wen. Microscopic Homogenization of Steel Fiber Lightweight Aggregate Concrete and Ultimate Bearing Capacity of Torsion Components[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3376-3384.

参考文献

[1] 张珍杰,王东明,王可,等.自密实陶粒泡沫混凝土墙板生产试验研究[J].混凝土与水泥制品,2021(4):74-77.
ZHANG Z J, WANG D M, WANG K, et al. Research on production test of self-compacting ceramist foam concrete wall panels[J]. China Concrete and Cement Products, 2021(4): 74-77 (in Chinese).
[2] MA S C, LI L H, BAO P. Seismic performance test of double-row reinforced ceramsite concrete composite wall panels with cores[J]. Applied Sciences, 2021, 11(6): 2688.
[3] XIE J H, ZHAO J B, WANG J J, et al. Investigation of the high-temperature resistance of sludge ceramsite concrete with recycled fine aggregates and GGBS and its application in hollow blocks[J]. Journal of Building Engineering, 2021, 34: 101954.
[4] 郑文忠,敖日格乐,王英,等.碱矿渣陶粒混凝土砌块砌体受压本构关系[J].工程力学,2020,37(10):218-227.
ZHENG W Z, AO R, WANG Y, et al. Compressive constitutive relation of alkali slag ceramsite concrete masonry built by alkali slag pottery mortar[J]. Engineering Mechanics, 2020, 37(10): 218-227 (in Chinese).
[5] 李军,高桂波.造纸污泥陶粒混凝土的制备及在轻质自保温墙体材料中的应用[J].新型建筑材料,2021,48(2):154-157+168.
LI J, GAO G B. Preparation of ceramsite concrete from paper mill sludge and its application in green self-insulation wall material[J]. New Building Materials, 2021, 48(2): 154-157+168 (in Chinese).
[6] 赵可昕,杨永民.装配式陶粒生态围挡板的设计及结构试验研究[J].新型建筑材料,2021,48(3):25-28.
ZHAO K X, YANG Y M. Design and structure test research of prefabricated ceramsite ecological enclosure[J]. New Building Materials, 2021, 48(3): 25-28 (in Chinese).
[7] 孟郅恒,王新堂,刘链波.冷弯薄壁钢-陶粒混凝土组合楼板火灾响应试验研究[J].空间结构,2021,27(1):52-59+36.
MENG Z H, WANG X T, LIU L B. Experimental study of fire response of composite slab of cold-formed thin-walled steel and ceramsite concrete[J]. Spatial Structures, 2021, 27(1): 52-59+36 (in Chinese).
[8] 王祖坚,李盈富,蒋子杰.高速公路改扩建工程陶粒混凝土制备及应用研究[J].西部交通科技,2020(8):27-30.
WANG Z J, LI Y F, JIANG Z J. Study on preparation and application of ceramsite concrete in expressway reconstruction and extension project[J]. Western China Communications Science & Technology, 2020(8): 27-30 (in Chinese).
[9] RAUT L L. Torsional strengthening of under reinforced concrete beams using crimped steel fiber[J]. International Journal of Research in Engineering and Technology, 2014, 3(6): 466-471.
[10] 叶艳霞,王宗彬,谢夫林,等.钢纤维增强高强轻骨料混凝土的力学性能[J].建筑材料学报,2021,24(1):63-70.
YE Y X, WANG Z B, XIE F L, et al. Mechanical properties of steel fiber reinforced high-strength lightweight aggregate concrete[J]. Journal of Building Materials, 2021, 24(1): 63-70 (in Chinese).
[11] 罗立胜,陈万祥,郭志昆,等.混杂纤维轻骨料混凝土研究现状[J].混凝土,2021(1):98-101+106.
LUO L S, CHEN W X, GUO Z K, et al. Research status of hybrid fiber reinforced lightweight aggregate concrete[J]. Concrete, 2021(1): 98-101+106 (in Chinese).
[12] 赵富康,蔺鹏臻.高速铁路跨度40 m双线混凝土简支箱梁的约束扭转效应分析[J].科学技术与工程,2020,20(25):10472-10479.
ZHAO F K, LIN P Z. Analysis of constrained torsional effect of high-speed railway span 40 m double-line concrete simple box girder[J]. Science Technology and Engineering, 2020, 20(25): 10472-10479 (in Chinese).
[13] 李翔宇,王德斌,任美佳,等.考虑扭转作用的钢筋混凝土剪力墙抗震性能研究[J].低温建筑技术,2018,40(12):23-27.
LI X Y, WANG D B, REN M J, et al. Research on seismic performance of reinforced concrete shear wall considering torsion effect[J]. Low Temperature Architecture Technology, 2018, 40(12): 23-27 (in Chinese).
[14] 王宇航,聂建国,樊健生.考虑扭转效应的钢管混凝土纤维梁模型应用研究[J].工程力学,2014,31(7):45-53.
WANG Y H, NIE J G, FAN J S. Application of fiber bean-cplumn model for concrete filled steel tube column considering torsion effect[J]. Engineering Mechanics, 2014, 31(7): 45-53 (in Chinese).
[15] 陈圣刚,李朝来,刁波,等.钢筋混凝土U形截面梁扭转性能有限元分析[J].建筑结构学报,2020,41(s1):230-237.
CHEN S G, LI C L, DIAO B, et al. Finite element analysis of U-shaped RC beams under pure torsion[J]. Journal of Building Structures, 2020, 41(s1): 230-237 (in Chinese).
[16] 林旭健.钢纤维高强砼构件纯扭试验[J].福州大学学报(自然科学版),2002,30(1):89-91.
LIN X J. Experimental investigation of steel fiber high-strength concrete members subjected to pure torsion[J]. Journal of Fuzhou University (Natural Sciences Edtion), 2002, 30(1): 89-91 (in Chinese).
[17] RAO T D G, SESHU D R. Torsion of steel fiber reinforced concrete members[J]. Cement and Concrete Research, 2003, 33(11): 1783-1788.
[18] 李志军,史庆轩.钢筋混凝土双向剪扭构件有限元分析[J].西安工业学院学报,2005,25(5):468-470+485
LI Z J, SHI Q X. The finite element analysis on the torsional behavior of section reinforced concrete members subjected biaxially with eccentric compression and shear[J]. Journal of Xi'an Institute of Technology, 2005, 25(5): 468-470+485 (in Chinese)
[19] WANG Y H, ZHOU X H. Non-linear torsion behaviour of concrete filled steel tube columns[J]. Materials and Structures, 2016, 49(12): 5227-5241.
[20] 吴振华.钢纤维轻骨料粉煤灰混凝土力学性能试验研究[J].混凝土与水泥制品,2019(8):54-57.
WU Z H. Experimental research on mechanical performance of steel fiber reinforced lightweight aggregate concrete with fly ash[J]. China Concrete and Cement Products, 2019(8): 54-57 (in Chinese).
[21] 邱继生,姚谦峰.纯扭作用下钢纤维混凝土梁极限扭矩计算方法的研究[J].工业建筑,2010,40(1):78-81+97.
QIU J S, YAO Q F. Study on calculation method of the ultimate torque of beam reinforced with steel fiber in torsion[J]. Industrial Construction, 2010, 40(1): 78-81+97 (in Chinese).
[22] 张根俞.钢纤维混凝土受扭构件开裂扭矩及极限扭矩计算分析[J].建筑结构,2011,41(S1):1013-1017.
ZHANG G Y. Computational analysis on the crack torque and ultimate torque of steel fiber reinforced concrete members under pure torsion[J]. Building Structure, 2011, 41(S1): 1013-1017 (in Chinese).
[23] OKAY F, ENGIN S. Torsional behavior of steel fiber reinforced concrete beams[J]. Construction and Building Materials, 2012, 28(1): 269-275.
[24] 赵燕茹,苏颂,代洪伟,等.钢纤维钢筋混凝土受扭构件的强度试验与理论分析[J].混凝土,2017(3):93-96.
ZHAO Y R, SU S, DAI H W, et al. Experimental study on coal gangue thermal insulation glazed hollow bead concrete[J]. Concrete, 2017(3): 93-96 (in Chinese).
[25] 赵燕茹,王磊,代洪伟,等.钢纤维钢筋混凝土纯扭构件的有限元分析[J].混凝土,2016(11):7-11.
ZHAO Y R, WANG L, DAI H W, et al. Finite element analysis of steel fiber reinforced concrete pure torsional component[J]. Concrete, 2016(11): 7-11 (in Chinese).
[26] YAP S P, KHAW K R, ALENGARAM U J, et al. Effect of fibre aspect ratio on the torsional behaviour of steel fibre-reinforced normal weight concrete and lightweight concrete[J]. Engineering Structures, 2015, 101: 24-33.
[27] 李建锵.钢纤维高强轻骨料混凝土梁抗扭性能试验研究[D].泉州:华侨大学,2014.
LI J Q. Torsional performance test on steel fiber reinforced ceramsite concrete[D]. Quanzhou: Huaqiao University, 2014 (in Chinese).
[28] SONG Z R, PENG X H, TANG S, et al. A homogenization scheme for elastoplastic composites using concept of Mori-Tanaka method and average deformation power rate density[J]. International Journal of Plasticity, 2020, 128: 102652.
[29] 蒋春霞.基于水泥砂浆抗拉强度及弹性模量的研究[J].安徽建筑,2021,28(3):160-161.
JIANG C X. Research on tensile strength and elastic modulus of cement mortar[J]. Anhui Architecture, 2021, 28(3): 160-161 (in Chinese).
[30] 马少春,贾鹏举,鲍鹏,等.耐碱玻纤增强陶粒混凝土力学性能试验研究[J].混凝土与水泥制品,2020(12):45-49.
MA S C, JIA P J, BAO P, et al. Experimental study on mechanical properties of alkali resistant glass fiber reinforced ceramsite concrete[J]. China Concrete and Cement Products, 2020(12): 45-49 (in Chinese).
[31] 黄磊,王小平,张达生.轻骨料混凝土单轴受力下的塑性损伤模型应用研究[J].建筑结构,2012,42(7):81-83+44.
HUANG L, WANG X P, ZHANG D S. Application research on damaged plasticity model of lightweight aggregate concrete under uniaxial stress[J]. Building Structure, 2012, 42(7): 81-83+44 (in Chinese).
[32] 王怀亮,朱建威.高性能轻骨料混凝土高温后受压本构关系研究[J].建筑结构学报,2019,40(11):200-209.
WANG H L, ZHU J W. Compressive behaviour of high performance lightweight concrete after high temperature[J]. Journal of Building Structures, 2019, 40(11): 200-209 (in Chinese).
[33] HSU T. Torsion of reinforced concrete[J]. New York: Van Nostr and Reinhold. 1984.