基于钢筋材料应变状态的梁构件性能评估方法初探
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（香港华艺设计顾问（深圳）有限公司， 深圳 518031）［摘要］构件性能评估对把握大震作用下整体结构抗震性能有着非常重要的意义。以梁构件为例，现阶段梁评估参数为转角，评估标准参考FEMA-356或PEER/ATC72-1。随着计算的进一步精细化，基于材料模型的计算方法成为热点，但对该方法模拟的构件缺乏一个直观的由纤维应变反映构件性能状态的评估标准。基于平截面假定，结合钢筋本构曲线，建立力平衡方程和应变-曲率-转角方程，推导出构件转角同钢筋应变相关联的计算公式，最后根据FEMA-356的梁构件性能状态转角反算钢筋应变，为直观评估梁的性能状态提供一个量化指标。［关键词］构件性能评估; 钢筋应变; 应变-曲率-转角中图分类号：TU375 文献标识码：A 文章编号：1002-848X(2013)21-0086-03Exploration on evaluation method of beam component performance in state of reinforcement strainLin Chaowei, Wang Xingfa(Hong Kong Hua Yi Designing Consultants(S.Z.) Ltd., Shenzhen 518031, China)Abstract: Component performance evaluation has a very important significance to evaluate seismic performance under a rare earthquake. Taking beam component as an example, the present evaluation parameter of beams is the rotation and evaluation standard is referred to FEMA-356 and PEER/ATC72-1. With the furthering of calculation, the method based on material model is becoming a hot focus, however, the evaluation standard is not available which can directly reflect component performance from fiber strain. An equation combining component cross-section rotation and reinforcement strain was deduced based on the assumption of plane section, reinforcement constitutive curve and the establishment of force balance and strain-curvature-rotation equation. Finally, reinforcement strain value was calculated by beam component performance rotation of FEMA-356, thus providing a quantifying index to directly evaluate beam performance status.Keywords: component performance evaluation; reinforcement strain; strain-curvature-rotation作者简介：林超伟，硕士,高级工程师，一级注册结构工程师，Email：wei65125036@163.com。参考文献［1］JGJ 3—2010 高层建筑混凝土结构技术规程［S］. 北京：中国建筑工业出版社,2011.［2］American Society of Civil Engineers. Prestand and commentary guidelines for the seismic rehabilitation of buildings［R］.FEMA-356, Washington D.C.: Federal Emergency Management Agency, 2000.［3］PEER/ATC72-1 Modeling and acceptance criteria for seismic design and analysis of tall building［R］. Applied Technology Council, Redwood City, California, 2010.［4］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.［5］PAULAY T, PRIESTLY M J N. Seismic design of reinforced concrete and masonry buildings［M］. New York: John Wiley & Sonc, Inc., 1992.［6］Computers & Structures Inc. PERFORM Components and Elements［M］. 2006.［7］GB 50011—2010建筑抗震设计规范［S］. 北京：中国建筑工业出版社，2010.
