T形截面带翼缘剪力墙剪滞效应分析及有效翼缘宽度讨论

发布时间：2018-07-11 11:58

本文选题：带翼缘剪力墙 + 剪滞效应　；参考：《建筑结构》2014年22期

【摘要】：对一T形截面带翼缘剪力墙的应力分布进行了全过程模拟,验证了剪力滞后现象的存在,研究了加载过程中剪滞效应的发展规律,并讨论了不同设计参数对剪滞效应的影响。根据应力等效原则,得出不同工况下有效翼缘宽度的取值,并与国内外规范取值进行了分析比较。结果表明,随着荷载级数的增加,剪滞效应逐渐增强,在构件达到屈服时,剪滞效应最明显,有效翼缘宽度达到最小值。剪滞效应随轴压比的增大而增强,随剪跨比、长宽比的增大而减弱。Nehrp guidelines for the seismic rehabilitation of buildings(FEMA 273)关于有效翼缘宽度的取值比较合理,但是没有足够的安全储备。《混凝土结构设计规范》(GB 50010—2010)对于有效翼缘宽度的取值过于保守,造成材料浪费,甚至可能发生脆性破坏,因此对采用《混凝土结构设计规范》(GB 50010—2010)进行结构构件设计提出了一些实际建议。
[Abstract]:The stress distribution of a T-section flange shear wall is simulated, which verifies the existence of shear lag phenomenon, studies the development of shear lag effect during loading, and discusses the influence of different design parameters on shear lag effect. According to the principle of stress equivalence, the effective flange width under different working conditions is obtained and compared with the domestic and foreign norms. The results show that the shear lag effect increases gradually with the increase of the load series. The shear lag effect is the most obvious and the effective flange width reaches the minimum value when the member reaches yield. The shear lag effect increases with the increase of axial compression ratio, and weakens with the increase of shear span ratio and aspect ratio. Nehrp guidelines for the seismic rehabilitation of buildings (FEMA273) is reasonable for the effective flange width. But there is not enough safety reserve. The Code for Design of concrete structures (GB 50010-2010) is too conservative for the effective flange width, resulting in material waste and even brittleness damage. Therefore, some practical suggestions are put forward for the design of structural members with concrete structural Design Code (GB50010-2010).
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金资助项目(51178380)
【分类号】：TU398.2

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