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(浙江大學(xué)結(jié)構(gòu)工程研究所， 杭州 310058)

［摘要］混凝土結(jié)構(gòu)在建造以及服役過程中不可避免地產(chǎn)生損傷積累、抗力衰減和性能退化?；炷两Y(jié)構(gòu)的長(zhǎng)期性能是指結(jié)構(gòu)在長(zhǎng)期的荷載與環(huán)境耦合作用下，隨時(shí)間推進(jìn)表現(xiàn)出的具有時(shí)變性的功能或特性。結(jié)構(gòu)長(zhǎng)期性能反映了結(jié)構(gòu)性能隨時(shí)間的變化，是結(jié)構(gòu)的綜合性能?？紤]了在環(huán)境侵蝕作用、反復(fù)作用、持續(xù)作用下混凝土結(jié)構(gòu)的時(shí)變累積效應(yīng)，總結(jié)了混凝土結(jié)構(gòu)長(zhǎng)期性能在服役全過程中的劣化規(guī)律，明確了在環(huán)境侵蝕作用、反復(fù)作用、持續(xù)作用下結(jié)構(gòu)長(zhǎng)期性能劣化的各極限狀態(tài)準(zhǔn)則，并基于結(jié)構(gòu)設(shè)計(jì)現(xiàn)狀總結(jié)了結(jié)構(gòu)長(zhǎng)期性能的分項(xiàng)系數(shù)設(shè)計(jì)法和全概率設(shè)計(jì)法的設(shè)計(jì)思路。

［關(guān)鍵詞］混凝土結(jié)構(gòu)； 長(zhǎng)期性能； 時(shí)變規(guī)律； 極限狀態(tài)； 環(huán)境侵蝕；  設(shè)計(jì)理論

中圖分類號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)13-0001-06

Discussion on fundamental problems on long-term performance of concrete structures

JIN Weiliang, ZHANG Dawei, WU Kexian, HUANG Tengteng, ZHANG Kai

(Institute of Structure Engineering, Zhejiang University, Hangzhou 310058， China)

Abstract:Damage accumulation, resistance degradation and performance deterioration occur inevitably during construction and service life of concrete structures. Long-term performance of concrete structures refers to time-variant performance of structures with long-term load coupled with the environmental erosion. Long-term performance of concrete structure reflects the structural performance over time, which is the overall performance of the structure. The  time-varying cumulative effects including environmental erosion action, repeated action and persistent action were  considered, and the degradation  rule of long-term performance of concrete structures during service was summarized. Based on the current status of structural design, the partial factor method and full probabilistic method of long-term structural performance were summarized.

Keywords:concrete structure; long-term performance; time-varying rule; limit state; environmental erosion; design theory

*國(guó)家重點(diǎn)研發(fā)計(jì)劃重點(diǎn)專項(xiàng)項(xiàng)目(2016YFC0701400)，國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(51638013，51820105012)。

作者簡(jiǎn)介：通訊作者：吳柯嫻，博士研究生，Email：wukexian2019@gmail.com。