钢筋混凝土自复位剪力墙抗震性能试验研究
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摘要
自复位剪力墙是通过无黏结预应力钢绞线将预制墙板与预制墙板/基础连接成整体,其震后恢复能力良好。通过1个现浇钢筋混凝土剪力墙试件和3个自复位剪力墙试件的拟静力试验,研究了地震作用下自复位剪力墙的破坏特征、滞回性能、自复位特性及耗能能力等。研究结果表明:与现浇剪力墙相比,自复位剪力墙震后残余变形较小,破坏轻微,易于修复;自复位剪力墙滞回曲线捏拢明显,滞回环呈旗帜形;随着弯矩贡献比的增大,试件的自复位能力逐渐提高,但耗能能力有所下降。
The self-centering structure is a type of new structure that aimed to improve the restorability of structure after earthquake. Through low cyclic loading tests on one cast-in-place RC shear wall and three self-centering RC shear walls, different failure modes of the cast-in-place and the self-centering specimen were studied, and the effect of moment contribution ratio on the seismic performance of the self-centering shear wall was studied. The results indicate that compared with the cast-in-place shear wall, the self-centering specimens are damaged only slightly with small residual deformation and can be easily restored after earthquake. Pinching can be observed obviously in the hysteresis loops of the self-centering specimens, which makes the hysteresis loop flag-shaped. As the moment contribution ratio increases, the self-centering ability is improved, while the energy-dissipating ability decreases.
The self-centering structure is a type of new structure that aimed to improve the restorability of structure after earthquake. Through low cyclic loading tests on one cast-in-place RC shear wall and three self-centering RC shear walls, different failure modes of the cast-in-place and the self-centering specimen were studied, and the effect of moment contribution ratio on the seismic performance of the self-centering shear wall was studied. The results indicate that compared with the cast-in-place shear wall, the self-centering specimens are damaged only slightly with small residual deformation and can be easily restored after earthquake. Pinching can be observed obviously in the hysteresis loops of the self-centering specimens, which makes the hysteresis loop flag-shaped. As the moment contribution ratio increases, the self-centering ability is improved, while the energy-dissipating ability decreases.
引文
[1] ACI Innovation Task Group 5. Requirements for design of a special unbonded post-tensioned precast shear wall satisfying ACI ITG-5.1 and commentary:ACI ITG-5.2- 09[R]. Farmington Hills, MI: American Concrete Institute, 2009.
[2] SOUDKI K A, RIZKALLA S H, DAIKIW R W. Horizontal connections for precast concrete shear walls subjected to cyclic deformations part 2: prestressed connections[J]. PCI Journal, 1995, 40(5): 82-96.
[3] SMITH B J, KURAMA Y C, McGINNIS M J.Behavior of precast concrete shear walls for seismic regions: comparison of hybrid and emulative specimens[J]. Journal of Structural Engineering,2013,139(11):1917-1927.
[4] SMITH B J, KURAMA Y C, McGINNIS M J. Comparison of solid and perforated hybrid precast concrete shear walls for seismic regions[C]// Proceedings of the ASCE Structures Congress. Chicago: Structural Engineering Institute of ASCE, 2012: 1529-1540.
[5] PEREZ F J, PESSIKI S, SAUSE R. Experimental and analytical lateral load response of unbonded post-tensioned precast concrete walls[R]. Bethlehem: Lehigh University, 2004.
[6] RESRTEPO J I, RAHMAN A. Seismic performance of self-centering structural walls incorporating energy dissipators[J]. Journal of Structural Engineering, 2007, 133(11): 1560-1570.
[7] 孙巍巍,孟少平,蔡小宁.后张无粘结预应力装配式短肢剪力墙拟静力试验研究[J]. 南京理工大学学报 (自然科学版), 2011, 35(3):422- 426.(SUN Weiwei, MENG shaoping, CAI Xiaoning. Quasi-static test research of unbonded post-tensioned assembly short-limb shear wall[J]. Journal of Nanjing University of Science and Technology (Natural Science Edition), 2011, 35(3):422- 426. (in Chinese))
[8] 党像梁,吕西林,周颖.底部开水平缝预应力自复位剪力墙试验研究及数值模拟[J]. 地震工程与工程振动, 2014, 34(4): 154-161.(DANG Xiangliang, LU Xilin, ZHOU Ying.Experimental study and numerical simulation of self-centering shear walls with horizontal bottom slit[J]. Earthquake Engineering and Engineering Vibration, 2014, 34(4): 154-161.(in Chinese))
[9] New Zealand Standards. Concretee structure standard: part 1: the design of concrete structures: NZS 3101: part 1: 2006[S]. Wellington: New Zealand Standard Council Concrete, 2006.
[10] 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.(Specification of for seismic test of buildings: JGJ/T 101—2015[S]. Beijing: China Architecture & Building Press, 2015.(in Chinese))
[11] ACI Innovation Task Group 5. Acceptance criteria for special unbonded post-tensioned precast structural walls based on validation testing:ACI ITG-5.1- 07[R]. Farmington Hills, MI: American Concrete Institute, 2007.
[2] SOUDKI K A, RIZKALLA S H, DAIKIW R W. Horizontal connections for precast concrete shear walls subjected to cyclic deformations part 2: prestressed connections[J]. PCI Journal, 1995, 40(5): 82-96.
[3] SMITH B J, KURAMA Y C, McGINNIS M J.Behavior of precast concrete shear walls for seismic regions: comparison of hybrid and emulative specimens[J]. Journal of Structural Engineering,2013,139(11):1917-1927.
[4] SMITH B J, KURAMA Y C, McGINNIS M J. Comparison of solid and perforated hybrid precast concrete shear walls for seismic regions[C]// Proceedings of the ASCE Structures Congress. Chicago: Structural Engineering Institute of ASCE, 2012: 1529-1540.
[5] PEREZ F J, PESSIKI S, SAUSE R. Experimental and analytical lateral load response of unbonded post-tensioned precast concrete walls[R]. Bethlehem: Lehigh University, 2004.
[6] RESRTEPO J I, RAHMAN A. Seismic performance of self-centering structural walls incorporating energy dissipators[J]. Journal of Structural Engineering, 2007, 133(11): 1560-1570.
[7] 孙巍巍,孟少平,蔡小宁.后张无粘结预应力装配式短肢剪力墙拟静力试验研究[J]. 南京理工大学学报 (自然科学版), 2011, 35(3):422- 426.(SUN Weiwei, MENG shaoping, CAI Xiaoning. Quasi-static test research of unbonded post-tensioned assembly short-limb shear wall[J]. Journal of Nanjing University of Science and Technology (Natural Science Edition), 2011, 35(3):422- 426. (in Chinese))
[8] 党像梁,吕西林,周颖.底部开水平缝预应力自复位剪力墙试验研究及数值模拟[J]. 地震工程与工程振动, 2014, 34(4): 154-161.(DANG Xiangliang, LU Xilin, ZHOU Ying.Experimental study and numerical simulation of self-centering shear walls with horizontal bottom slit[J]. Earthquake Engineering and Engineering Vibration, 2014, 34(4): 154-161.(in Chinese))
[9] New Zealand Standards. Concretee structure standard: part 1: the design of concrete structures: NZS 3101: part 1: 2006[S]. Wellington: New Zealand Standard Council Concrete, 2006.
[10] 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.(Specification of for seismic test of buildings: JGJ/T 101—2015[S]. Beijing: China Architecture & Building Press, 2015.(in Chinese))
[11] ACI Innovation Task Group 5. Acceptance criteria for special unbonded post-tensioned precast structural walls based on validation testing:ACI ITG-5.1- 07[R]. Farmington Hills, MI: American Concrete Institute, 2007.