槽口-无粘结水平接缝预制剪力墙压弯承载力研究
摘要：为研究槽口-无粘结水平接缝预制剪力墙压弯承载力的计算方法，分析无粘结钢筋“应变滞后”引起的变形区段、受拉钢筋应力和相对界限受压区高度的变化，考虑该变化提出了槽口-无粘结水平接缝预制剪力墙的压弯承载力计算公式，并根据槽口-无粘结水平接缝预制剪力墙的低周反复试验进行了验证，结果表明，试验值与理论值吻合较好。分析无粘结度和无粘结长度对压弯承载力的影响，结果表明，大偏心受压时，无粘结度对承载力影响较小，小偏心受压和界限状态时，无粘结度越小，承载力越大；无粘结长度对承载力影响较小，可忽略。对槽口-无粘结水平接缝预制剪力墙和现浇剪力墙的抗震性能进行对比，结果表明，槽口-无粘结水平接缝预制剪力墙具有较高的延性及耗能能力，槽口使接缝处无滑移。本研究提出了一种设置普通钢筋无粘结段的预制剪力墙压弯承载力的计算方法，期望能为工程应用提供参考。
关键词：预制剪力墙；槽口-无粘结水平接缝；无粘结长度；无粘结度；压弯承载力；应变滞后
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[12] YAN J B,LI Z X,WANG T.Seismic behaviour of double skin composite shear walls with overlapped headed studs[J].Construction and Building Materials,2018,191(10):590-607.
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Study on axial force-moment capacity of rabbet-unbonded horizontal connection precast shear wall
Abstract: In order to study the axial force-moment capacity calculation method of rabbet-unbonded horizontal connection(RHC) precast shear wall, and analyze the changes of the deformation region, tensile rebar stress and the relative boundary compressive height caused by the “strain lag” of unbonded rebar. Considering the changes, the specification formula to calculate the axial force-moment capacity of the RHC precast shear wall was proposed. The quasi-static cyclic tests of RHC precast shear walls were performed, which was used to verify the axial force-moment capacity. The results show that the theoretical value and test value matches well. The effects of unbonded level and unbonded length on the axial force-moment capacity were studied. The results show that for large eccentric compression, the unbonded level has small effect on the capacity, but for the small eccentric compression and boundary damage, the smaller unbonded level leads to a larger capacity; the unbonded length has small effect on the capacity, which can be ignored. The seismic performance of RHC precast shear wall was compared with that of cast-in-place(CW) shear wall, and the results show that RHC precast shear wall has higher ductility and energy dissipation capacity, and the rabbets make the connection no slip. A calculation method of axial force-moment capacity for precast shear wall structures with ordinary rebar unbounded region was proposed, which is expected to provide the reference for engineering applications.
Keywords: precast shear wall; rabbet-unbonded horizontal connection; unbonded length; unbonded level; axial force-moment capacity; strain lag
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