基于鋼筋材料應(yīng)變狀態(tài)的梁構(gòu)件性能評(píng)估方法初探
林超偉，王興法
- 摘 要
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（香港華藝設(shè)計(jì)顧問(wèn)（深圳）有限公司， 深圳 518031）［摘要］構(gòu)件性能評(píng)估對(duì)把握大震作用下整體結(jié)構(gòu)抗震性能有著非常重要的意義。以梁構(gòu)件為例，現(xiàn)階段梁評(píng)估參數(shù)為轉(zhuǎn)角，評(píng)估標(biāo)準(zhǔn)參考FEMA-356或PEER/ATC72-1。隨著計(jì)算的進(jìn)一步精細(xì)化，基于材料模型的計(jì)算方法成為熱點(diǎn)，但對(duì)該方法模擬的構(gòu)件缺乏一個(gè)直觀的由纖維應(yīng)變反映構(gòu)件性能狀態(tài)的評(píng)估標(biāo)準(zhǔn)。基于平截面假定，結(jié)合鋼筋本構(gòu)曲線(xiàn)，建立力平衡方程和應(yīng)變-曲率-轉(zhuǎn)角方程，推導(dǎo)出構(gòu)件轉(zhuǎn)角同鋼筋應(yīng)變相關(guān)聯(lián)的計(jì)算公式，最后根據(jù)FEMA-356的梁構(gòu)件性能狀態(tài)轉(zhuǎn)角反算鋼筋應(yīng)變，為直觀評(píng)估梁的性能狀態(tài)提供一個(gè)量化指標(biāo)。［關(guān)鍵詞］構(gòu)件性能評(píng)估; 鋼筋應(yīng)變; 應(yīng)變-曲率-轉(zhuǎn)角中圖分類(lèi)號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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作者簡(jiǎn)介：林超偉，碩士,高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：wei65125036@163.com。參考文獻(xiàn)［1］JGJ 3—2010 高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京：中國(guó)建筑工業(yè)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 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］. 北京：中國(guó)建筑工業(yè)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建筑抗震設(shè)計(jì)規(guī)范［S］. 北京：中國(guó)建筑工業(yè)出版社，2010.
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