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(1 云南大學(xué)建筑與規(guī)劃學(xué)院， 昆明 650500； 2 浙江大學(xué)建筑工程學(xué)院， 杭州 310058)

［摘要］隨著服役齡期的增加，既有建筑結(jié)構(gòu)的力學(xué)性能在自然條件下會(huì)呈現(xiàn)出衰退趨勢，形成耐久性損傷。結(jié)構(gòu)耐久性研究存在時(shí)間跨度長、影響因素復(fù)雜、不確定性大等問題，目前尚未有成熟的隨機(jī)理論成果對(duì)其準(zhǔn)確預(yù)測，基于數(shù)據(jù)監(jiān)測更新的隨機(jī)模型在一定程度上為該問題的解決提供了新的思路?；诓牧蠈?shí)測數(shù)據(jù)驅(qū)動(dòng)的貝葉斯信息更新，發(fā)展了概率密度演化理論基礎(chǔ)上的結(jié)構(gòu)易損性分析方法，從而實(shí)現(xiàn)對(duì)結(jié)構(gòu)實(shí)時(shí)動(dòng)態(tài)性能的準(zhǔn)確預(yù)判?？紤]材料性能參數(shù)的隨機(jī)性，以某7層RC框架結(jié)構(gòu)為例，在5個(gè)地震動(dòng)條帶中均勻選取滿足場地條件的20條地震動(dòng)記錄，綜合考慮結(jié)構(gòu)自身參數(shù)與外界激勵(lì)的不確定性，形成6個(gè)目標(biāo)齡期、4種性能水平下的地震易損性曲線，進(jìn)而生成考慮齡期連續(xù)變化的時(shí)變易損性曲面，證明所提方法的工程實(shí)用性。 

［關(guān)鍵詞］材料性能退化；RC框架結(jié)構(gòu)；實(shí)測數(shù)據(jù)驅(qū)動(dòng)信息更新；概率密度演化理論；時(shí)變易損性 

中圖分類號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)15-0054-08

 Timedependent vulnerability analysis of RC frame structures based on material parameter updating

YANG  Sizhao1,  WANG  Xianjie1,2 

(1 School of Architecture and Urban Planning, Yunnan University, Kunming 650500， China；2 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058， China) 

Abstract: With the increase of curing age, the mechanical properties of the existing structure show a tendency of decay in the atmospheric environment that forming durability damage. There is no mature stochastic theory achievement to predict it accurately at present because the research on the structures durability has problems such as long time span, complex influencing factors and large uncertainly, etc. The random model based on data monitoring and updating provides a new idea for solving this problem to some extent. The Bayesian information updating method based on measured data of material was proposed, the structural vulnerability analysis method was established based on the probability density evolution method (PDEM), thus the real-time dynamic performance of structures was accurately predicted. A 7-layer RC frame structures was taken as an example, and the 20 ground motion records of satisfying the site conditions were uniformly selected in the 5 seismic belts to comprehensively considering the randomness of structural parameters and external excitation. Seismic vulnerability curves with 6 target ages and 4 performance levels were formed, and then the time-dependent vulnerability surfaces with the continuous change of curing age were established. The engineering practicability of the proposed method was verified. 

Keywords:material performance degradation； RC frame structure； information updating driven by measured data； probability density evolution method； time-dependent vulnerability

*廣西防災(zāi)減災(zāi)與工程安全重點(diǎn)實(shí)驗(yàn)室系研究資助項(xiàng)目（2016ZDK009，2016JYB009），云南省教育廳科學(xué)研究基金資助項(xiàng)目（2018Y07）。

 作者簡介：楊思昭，碩士，Email:yangsz0616@yeah.net；通信作者：王憲杰，博士，碩士生導(dǎo)師，Email: xianjiewang@ynu.edu.cn。