摘要
叠合板式剪力墙结构是一种新型的装配式结构,它吸收了现浇混凝土结构与预制混凝土结构的优点,已经在国内中低层建筑中推广应用。目前的研究只是针对低轴压比下的抗震性能,将其推广应用于高层建筑中必然要开展高轴压比下抗震性能的研究。首先从理论上推导了在高轴压比下叠合板式剪力墙的极限承载力,结果表明叠合板式剪力墙由于预制层中混凝土强度等级高于现浇层的混凝土,在高轴压比下叠合剪力墙的极限承载力达到甚至超过了现浇整体剪力墙。基于OpenSEES采用两种不同模型对叠合板式剪力墙在不同轴压比下的受力性能进行模拟。第一种是多垂直杆单元模型,第二种是模型是纤维截面模型。模拟结果验证了理论推导的正确性,边缘构件预制的叠合剪力墙的极限承载力在高轴压比下要高于边缘构件现浇的叠合剪力墙,而且边缘构件预制的叠合剪力墙施工更加方便。因此预制边缘构件的叠合剪力墙推广价值更大。
The superimposed shear wall is a new assembly-type RC structure,it imbibes advantages of cast-in-place concrete structures and precast concrete structures,now superimposed shear walls are applied in medium-rise and low-rise buildings of seismic zones of China.With increase in the speed of urbanization,more and more high-rise buildings are built,the aseismic behavior of superimposed shear walls with higher axial compression ratios should be investigated so that its application can be extended to high-rise buildings.Here,the theoretical calculation formulas for the ultimate load-bearing capacity of a superimposed shear wall were deduced under higher axial load ratios,the results showed that the ultimate load-bearing capacity of a superimposed shear wall can reach or exceed that of an entire cast-in-place concrete shear wall under higher axial load ratios because the concrete strength of a preformed layer is higher than that of a cast-in-place layer.Simulations adopting two different models and OPENSEES finite element software were performed to support the theoretical results.These two models included multi-vertical line element model and fiber section model.The simulated results verified the correctness of the theoretical derivation,it was shown that the superimposed shear wall with prefabricated boundary element not only is convenient to make but also has a higher ultimate load-bearing capacity than the superimposed shear wall with cast-in-place boundary element does under higher axial load ratios;so the superimposed shear wall with prefabricated boundary element is more valuable in actual applications.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第9期227-239,共13页
Journal of Vibration and Shock
基金
上海市科委重大课题(14DZ1202100)
关键词
建筑工业化
叠合板式剪力墙
多垂直杆单元模型
纤维截面模型
轴压比
building industrialization
superimposed shear wall
multi-vertical line element model
fiber section model
axial load ratios
