两种密肋框格屈曲约束低屈服点钢板剪力墙抗震性能试验研究

发布时间：2018-04-30 04:34

本文选题：钢板剪力墙 + 低屈服点钢　；参考：《建筑结构学报》2017年10期

【摘要】：通过对2榀缩尺比例为1∶3的两种密肋框格屈曲约束构造的低屈服点钢板剪力墙试件进行抗震性能试验研究,对比分析了两榀试件在低周往复荷载作用下的破坏形态、滞回性能、延性、刚度、承载力和耗能性能等,考察了框-墙之间的剪力分配关系,以此为基础检验了周边框架柱刚度阈值公式的有效性,探讨了钢板剪力墙结构的变形模式。研究结果表明:两侧密肋框格屈曲约束构造能够有效地抑制内填钢板的整体屈曲,使其实现"先屈服,再屈曲"的设计目标。两个试件的破坏进程符合"强框架,弱墙板"和"强柱弱梁"的设计理念,最终均呈平面内弯-剪破坏模式。结构的滞回环饱满呈梭形,具有稳定的承载与塑性变形能力,延性好,初始侧向刚度大。外框架与内填钢板之间的剪力分配转换平稳有序,能够组成合理可靠的双重抗侧力体系。给出了框架柱脚最大剪力和抗剪强度的近似计算公式,可以用于竖向边缘构件平面内受剪屈服的校核。提出了一般钢板剪力墙结构受剪承载力和受弯承载力的计算公式,便于工程设计人员进行内填钢板和周边框架规格的初步选择。
[Abstract]:The aseismic behavior of two specimens of steel plate shear wall with low yield point and low yield point were studied by means of seismic tests. The failure modes of two specimens under low cyclic reciprocating loads were compared and analyzed by means of two specimens with two kinds of multi-ribbed frame lattice buckling constraint structures with a scale ratio of 1:3. Hysteretic performance, ductility, stiffness, bearing capacity and energy dissipation performance are investigated. The shear distribution relationship between frame and wall is investigated. The validity of stiffness threshold formula for peripheral frame columns is tested, and the deformation mode of steel plate shear wall structure is discussed. The results show that the buckling constraint structure can effectively suppress the overall buckling of the inner-filled steel plate and achieve the design goal of "yield first, then buckle again". The failure process of the two specimens is in accordance with the design concepts of "strong frame, weak wall plate" and "strong column and weak beam". The hysteretic loop of the structure is fusiform with stable load-bearing and plastic deformation, good ductility and high initial lateral stiffness. The shear distribution between the outer frame and the steel plate is stable and orderly, which can form a reasonable and reliable dual lateral force resistance system. The approximate formulas for calculating the maximum shear force and shear strength of frame column foot are given, which can be used to check the shear yield of vertical edge members in plane. The formulas of shear capacity and flexural bearing capacity of steel plate shear wall structure are put forward, which is convenient for engineering designers to select the specifications of the steel plate and the surrounding frame.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51578442)
【分类号】：TU352.11;TU398.2

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