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。本文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。
Abstract
The superimposed shear wall is a new assembly-type RC structure,it imbibes advantages of the entire cast-in-place concrete Structure and precast concrete structure,now the superimposed shear walls are applied to medium and low-rise buildings in seismic zone of China. With the improvement of the speed of urbanization, more and more high-rise residential was built, the Seismic behavior of the superimposed shear walls in high axial compression ratio should be investigated so that the application can be further promoted in a high-rise building. The theoretical formulas of calculation for ultimate bearing capacity of superimposed shear wall are set up under high axial-load ratios, the results show that the ultimate bearing capacity of superimposed shear wall can reach or exceed the entire cast-in-place concrete shear wall under high axial-load ratios because of concrete strength in preformed layer higher than cast-in-place layer. A simulation with OPENSEES finite element software was given to support the theoretical results. These models contain multiple vertical line element model,fiber section model. The superimposed shear wall with prefabricated boundary element not only is convenient to the construction but also has higher ultimate bearing capacity than superimposed shear wall with cast-in-situ boundary element under high axial-load ratios. The superimposed shear wall with prefabricated boundary element is of much more practical value in actual production.
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
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Key words
building industrialization /
superimposed shear wall /
multiple vertical line element model;fiber section model /
axial-load ratios
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脚注
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