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(同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200092)

［摘要］根據(jù)以受彎為主的鋼筋混凝土梁、柱的地震破壞過(guò)程提出了各性能水平和性能界限狀態(tài)的劃分標(biāo)準(zhǔn)，并建立了對(duì)應(yīng)于各性能界限狀態(tài)的變形計(jì)算方法。通過(guò)對(duì)梁、柱截面的彎矩-曲率分析，分別建立了梁、柱截面受壓區(qū)高度的計(jì)算方法。利用對(duì)美國(guó)太平洋地震工程研究中心建立的鋼筋混凝土柱試驗(yàn)數(shù)據(jù)庫(kù)的統(tǒng)計(jì)分析和鋼筋混凝土受彎構(gòu)件的塑性鉸理論，提出了柱在各性能界限狀態(tài)時(shí)截面壓區(qū)邊緣混凝土的應(yīng)變限值計(jì)算方法。通過(guò)混凝土受壓應(yīng)變和鋼筋受拉應(yīng)變的限值得到鋼筋混凝土梁、柱的變形限值。研究結(jié)果可為鋼筋混凝土結(jié)構(gòu)基于位移的抗震設(shè)計(jì)和抗震性能評(píng)價(jià)提供依據(jù)。

［關(guān)鍵詞］基于位移的抗震設(shè)計(jì)；鋼筋混凝土；梁；柱；地震損傷

Performance limit states and deformation limits of RC beams and columns

Jiang Huanjun, Wang Bin, Lü Xilin(State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract:The criterion to classify the performance levels and performance limit states are proposed for flexure-dominant reinforced concrete(RC) beams and columns according to the seismic damage process. The method to estimate the deformation limits corresponding to these limit states is developed. The formulas are derived to estimate the compression zone depth of beam and column section respectively. The strain limit of the extreme compression fiber of column section at individual performance limit state is obtained on the basis of the plastic-hinge method suitable for flexure-critical RC structural members and statistical analysis on the database containing the results of cyclic tests on RC columns assembled at the Pacific Earthquake Engineering Research Center (PEER) in USA. Through the limits applied on concrete compression strain and steel tensile strain, the deformation limits on RC beams and columns are developed. The research results can be utilized for displacement-based seismic design and seismic performance evaluation of RC structures.

Keywords:displacement-based seismic design; reinforced concrete; beam; column; seismic damage

*國(guó)家自然科學(xué)基金項(xiàng)目(50708081，90815029)；上海市浦江人才計(jì)劃項(xiàng)目(08PJ1409900)。

作者簡(jiǎn)介：蔣歡軍，博士，副研究員，Email：jhj73@#edu.cn。

參考文獻(xiàn)

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［9］PAULAY T，PRIESTLY M J N. Seismic Design of Reinforced Concrete and Masonry Buildings［M］. John Wiley & Sons, Inc. New York, 1992.