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*
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（西安建筑科技大学土木工程学院， 西安 710055）［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。［关键词］带翼缘剪力墙; 剪滞效应; 数值模拟; 影响因素; 有效翼缘宽度中图分类号：TU375 文献标识码：A 文章编号：1002-848X(2014)22-0067-05Shear lag effect analysis and effective flange width study of the T-shaped shear wall with flangeShi Qingxuan, Wang Bin, Zheng Xiaolong, Tian Jianbo(School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)Abstract:The stress distribution of the T-shaped shear wall with flange was simulated in the whole process and the existence of shear lag effect was verified. Then the development regularity of shear leg effect in the loading process was investiagted and the influences of different design parameters on shear leg effect were also disicussd. According to stress equivalence principle, the effective flange width values under different working conditions were obtained and compared with those from home and abroad foreign design codes. The result shows that the shear lag effect is gradually improved with the increase of load level. When the shear wall yields, the shear lag effect is the most obvious and effective flange width reaches the minimum. The shear lag effect strengthens with the increase of axial compression ratio, weakens with the increase of shear-span ratio and web height-flange width ratio. The effective flange width value taken from Nehrp guidelines for the seismic rehabilitation of buildings (FEMA 273) is reasonable, but the safety stock is inadequate. The effective flange width value derived from Code for design of concrete structures（GB 50010—2010）is too conservative so that material waste is caused and brittle failure may even happen. Therefore, some practical recommendations were proposed in the application of Code for design of concrete structures（GB 50010—2010）for structural design.Keywords: shear wall with flange; shear leg effect; numerical simulation; influence factor; effective flange width*国家自然科学基金资助项目（51178380）。作者简介：史庆轩，博士，教授，博士生导师，Email：qingxuanshi@sina.com。参考文献［1］张世泽.箱形薄壁梁剪力滞效应［M］.北京：人民交通出版社，1998.［2］聂建国，王宇航.钢-混凝土组合梁混凝土翼板开洞截面有效翼缘宽度分析［J］.建筑结构，2010，40(4)：72-75.［3］KWAN A K H. Shear leg in shear/core walls［J］. Journal of Structure Engineering, 1996, 122(9): 1097-1104.［4］史庆轩，委旭，门进杰.钢筋混凝土核心筒结构受力性能的数值模拟［J］.工程抗震与加固改造，2010，32(2)：1-7.［5］信瑛佩.考虑剪力滞后的复杂截面剪力墙配筋研究［D］.哈尔滨：哈尔滨工业大学，2011.［6］李青宁，张品乐，李晓蕾.短肢剪力墙剪滞效应分析［J］.工业建筑，2011，41(9)：59-62.［7］张守军，李青宁，郭泽英，等.T形截面短肢剪力墙剪滞效应及其影响［J］.工业建筑，2007，37(10)：38-41.［8］GB 50010—2010混凝土结构设计规范［S］.北京:中国建筑工业出版社，2011.［9］THOMSEN J H IV, WALLACE J W. Displacement-based design of slender reinforced concrete structural walls—experimental verification［J］. Journal of Structure Engineering, 2004, 130(4): 618-630.［10］FEMA 273 Nehrp guidelines for the seismic rehabilitation of buildings［S］. Washington D. C.: Federal Emergency Management Agency, 1997.
