Tests for aseismic performance of a high axial compression ratio RC shear wall reinforced with high ductile concrete
ZHANG Yangxi1,DENG Mingke1, GAO Dengke2
1.School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China;
2.Central China Real Estate Limited， Zhengzhou 450000， China
Abstract：To improve aseismic performance of a RC shear wall with high axial compression ratio, using high ductile concrete (HDC) layer to reinforce the wall was proposed. 3 RC shear walls with shear-span ratio of 1.1 were designed. One of them was taken as the contrastive specimen and the other two were reinforced with HDC layer and rebar net HDC layer, respectively. Pseudo static tests were used to study failure modes, deformation ability, energy dissipation capacity and stiffness degradation feature of shear wall specimens. The test results showed that for the shear wall specimen reinforced with HDC layer, its reinforced layer is cracked and not broken, it has good working performance with inner wall and a certain restraint effect on inner concrete to improve shear wall’s brittle shear failure characteristics; HDC layer can effectively improve shear wall’s shear-bearing capacity, deformation ability and energy dissipation one; HDC layer with rebar net piece can delay development of oblique cracks in reinforced layer, give full play to its good tensile ability and damage resistance capacity, and delay the reinforced specimen’s stiffness degradation in its failure stage; based on a softened truss model, considering HDC reinforced layer’s contribution, a formula for shear-bearing capacity of the reinforced specimens was proposed.
张阳玺1，邓明科1，高登科2. 高延性混凝土加固高轴压比剪力墙抗震性能试验研究[J]. 振动与冲击, 2020, 39(1): 49-56.
ZHANG Yangxi1,DENG Mingke1, GAO Dengke2. Tests for aseismic performance of a high axial compression ratio RC shear wall reinforced with high ductile concrete. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 49-56.
[1] Lopes M S. Experimental shear-dominated response of RC walls: Part I: Objectives, methodology and results[J]. Engineering Structures, 2001, 23(5):564-574.
[2] Lombard J, Lau D T, Humar J L, et al. Seismic strengthening and repair of reinforced concrete shear walls[C]//Proc., 12th World Conf. on Earthquake Engineering. 2000:1-8.
[3] 邓宗才, 曾洪超. 层内混杂FRP加固混凝土剪力墙抗震性能试验[J]. 北京工业大学学报, 2012, 38(10): 1504-1508.
DENG Zong-cai, ZENG Hong-chao. Experiment on seismic performance of reinforced concrete shear walls strengthened with hybrid FRP[J]. Journal Of Beijing University Of Technology, 2012, 38(10): 1504-1508. (in Chinese)
[4] 章红梅, 吕西林. 粘钢加固钢筋混凝土剪力墙抗震性能试验研究[J]. 结构工程师, 2007, 23(1):72-76.
ZHANG Hong-mei, LU Xi-lin. Expermient study on seismic behavior of reinforced concrete walls strengthened by bonded steel[J]. Structural Engineers, 2007, 23(1):72-76. (in Chinese)
[5] Li V C, LEUNG C K Y. Steady state and multiple cracking of short random fiber composites[J]. ASCE Journal of Engineering Mechanics, 1992, 118(11): 2246-2264.
[6] Li V C, 堀井,秀之. From micromechanics to structural engineering: the design of cementitious composites for civil engineering applications[J]. Proceedings of the Japan Society of Civil Engineers, 1993, 10(471): 1-12.
[7] Wang S, Wu C, Li V C. Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite (PVA-ECC)[J]. Aci Materials Journal, 2001, 98(6): 483-492.
[8] Fischer G, Li V C. Effect of matrix ductility on deformation behavior of steel reinforced ECC flexural members under reversed cyclic loading conditions[J]. Aci Structural Journal, 2011, 99(6):781-790.
[9] 邓明科, 樊鑫淼, 高晓军, 等. ECC面层加固受损砖砌体墙抗震性能试验研究[J]. 工程力学, 2015, 32(4):120-129.
DENG Ming-ke, FAN Xin-miao, GAO Xiao-jun, et al. Experimental investigation on seismic behavior of damaged brick masonry wall strengthened with ECC splint [J]. Engineering Mechanics, 2015, 32(4): 120-129. (in Chinese)
[10] 张远淼, 余江滔, 陆洲导,等. ECC修复震损剪力墙抗震性能试验研究[J]. 工程力学, 2015, 32(1):72-80.
ZHANG Yuan-miao, YU Jiang-tao, LU Zhou-dao, et al. Experimental test on aseismic behavior of damaged reinforced concrete shear wall repaired with ECC. Engineering Mechanics, 2015, 32(1): 72-80. (in Chinese)
[11] 邓明科, 常云涛, 梁兴文, 等. 高延性水泥基复合材料抗压强度尺寸效应的正交试验研究[J]. 工业建筑, 2013, 43(7): 80-85.
DENG Ming-ke, CHANG Yun-tao, LIANG Xing-wen, et al. Orthogonal test research on compressive strength size effect of engineered Cementitious Composites[J]. Industrial Construction, 2013, 43(7): 80-85. (in Chinese)
[12] 邓明科, 孙宏哲, 梁兴文, 等. 延性纤维混凝土抗弯性能的试验研究[J]. 工业建筑, 2014, 44(5):85-90.
DENG Ming-ke, SUN Hong-zhe, LIANG Xing-wen, et al. Experimental study of flexural behavior of ductile fiber reinforced concrete[J]. Industrial Construction, 2014, 44(5): 85-90. (in Chinese)
[13] 李艳, 梁兴文, 邓明科. 高性能PVA纤维增强水泥基复合材料常规三轴受压本构模型[J]. 工程力学, 2012, 29(1):106-113.
LI Yan, LIANG Xing-wen, DENG Ming-ke. A constitutive model for high performance pva fiber reinforced cement composites under conventional triaxial compression[J]. Engineering Mechanics, 2012, 29(1): 106-113. (in Chinese)
[14] 邓明科, 刘海勃, 秦萌, 等. 高延性纤维混凝土抗压韧性试验研究[J]. 西安建筑科技大学学报 (自然科学版), 2015, 47(5): 660-667. (in Chinese)
DENG Ming-ke, LIU Hai-bo, QIN Meng, et al. Experimental research on compressive toughness of the high ductile fiber reinforced concrete [J]. Journal of Xi'an University of Architecture & Technology: Natural Science Edition，2015，47(5): 660-667. (in Chinese)
[15] 邓明科, 张辉, 梁兴文, 等.高延性纤维混凝土短柱抗震性能试验研究[J]. 建筑结构学报, 2015, 36(12) 62-69.
DENG Ming-ke, ZAHNG Hui, LIANG Xing-wen, et al. Experimental study on seismic behavior of ductile fiber reinforced concrete short column [J]. Journal of Building Structures, 2015, 36(12): 62-69. (in Chinese)
[16] 邓明科, 卢化松, 杨开屏, 等. 型钢高延性混凝土短梁抗剪性能试验研究[J]. 建筑结构学报, 2015, 36（10）: 73-84.
DENG Ming-ke, LU Hua-song, YANG Kai-ping, et al. Experimental study on shear behavior of steel reinforced high ductile concrete short beams [J]. Journal of Building Structures, 2015, 36(10): 73-84. (in Chinese)
[17] 邓明科,张阳玺, 胡红波.高延性混凝加固钢筋混凝土抗震性能试验研究[J]. 建筑结构学报, 2017, 38（6）: 86-94.
DENG Ming-ke, ZHANG Yang-xi, HU Hong-bo. Experimental study on seismic behavior of reinforced concrete column strengthened with high ductile concrete [J]. Journal of Building Structures, 2017, 38(6): 86-94. (in Chinese)
[18] JGJ 101-96. 建筑抗震试验方法规程[S]. 北京: 中国建筑工业出版社, 1997. JGJ 101-96.
Specificating of testing methods for earthquake resistant building[S]. Beijing: China Architecture & Building Press, 1997. (in Chinese)
[19] 刘航, 庞同和, 蓝宗建. 用软化桁架理论计算钢筋砼低剪力墙的承载力[J]. 东南大学学报自然科学版, 1997, 27(s1): 58-64.
LIU Hang, PANG Tong-he, LAN Zong-jian. Analysis and calculation of the shear strength of low-rise RC shear walls using softened truss theory. Journal of Southeast University(Natural Science Edition), 1997, 27(s1): 58-64. (in Chinese)
[20] 唐兴荣, 蒋永生. 软化桁架理论在钢纤维高强砼低剪力墙中的应用[J]. 建筑结构学报, 1993, 14(2): 2-11.
TANG Xing-rong, JIANG Yong-sheng, DING Da-jun. Application of the theory of softened truss to low-rise steel fiber high strength concrete shear walls. Journal of Building Structures, 1993, 14(02): 2-11. (in Chinese)
