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考虑不同预拉力的新型混合装配式混凝土剪力墙抗震性能试验
引用本文:朱张峰,郭正兴,汤磊,朱寅.考虑不同预拉力的新型混合装配式混凝土剪力墙抗震性能试验[J].湖南大学学报(自然科学版),2015,42(11):41-48.
作者姓名:朱张峰  郭正兴  汤磊  朱寅
作者单位:(1.南京工业大学 土木工程学院,江苏 南京211816;2.东南大学 土木工程学院,江苏 南京210096)
摘    要:为探讨新型混合装配式剪力墙的抗震能力,制作足尺试件并进行低周反复荷载试验,试验中同时考虑了3种预应力筋张拉控制应力,以探索预应力对墙体抗震能力的影响.试验结果表明:与现浇试件相比,新型混合装配式剪力墙试件抗裂性能、承载力、刚度均明显提高,位移延性性能接近,耗能能力有所降低;随着张拉控制应力的提高,试件刚度提高,开裂延迟,残余变形减小,而强度无明显变化.建议采用的极限应力计算方法所计算结果与试验值基本一致,精度较高,基于现有规范的强度计算方法可保证足够安全度.

关 键 词:混合装配式混凝土  剪力墙  抗震性能  预应力  极限应力  强度

Seismic Performance Experiments on New Hybrid Precast Concrete Shear Walls under Different Prestress Forces
Institution:(1.College of Civil Engineering, Nanjing Tech Univ, Nanjing, Jiangsu211816, China;2.School of Civil Engineering, Southeast Univ,Nanjing, Jiangsu210096, China)
Abstract:In order to study the seismic performance of new hybrid precast concrete shear wall (NHPW), the low frequency cyclic loading experiment was carried out on one cast-in-situ and three NHPW specimens with different prestress forces. Compared with the cast-in-situ specimen, the anti-cracking ability, capacity strength and stiffness of NHPW specimens have been obviously improved, the displacement ductility remains similar, and the energy-dissipating capacity is lowered within later load stage. Meanwhile, along with the increase of the prestress force, the specimen stiffness and crack load have been enhanced, residual displacement decreases and the capacity property remains steady. The proposed method for predicting the ultimate stress of unbounded posttensioned tendons possesses high accuracy and the strength capacity design method according to available standard can ensure sufficient safety.
Keywords:hybrid precast concrete  shear walls  seismic performance  prestressing  ultimate stress  strength
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