發(fā)布時(shí)間：2018-03-27 09:03

  本文選題：矩張量　切入點(diǎn)：聲發(fā)射　出處：《防災(zāi)減災(zāi)工程學(xué)報(bào)》2017年05期

【摘要】：為了利用聲發(fā)射技術(shù)對(duì)鋼筋混凝土構(gòu)件損傷進(jìn)行定量檢測(cè),將矩張量在地震工程學(xué)中反演震源機(jī)制的理論用于結(jié)構(gòu)的聲發(fā)射無(wú)損檢測(cè)。闡述了基于矩張量理論的聲發(fā)射檢測(cè)技術(shù)原理,推導(dǎo)了利用矩張量理論反演裂縫機(jī)制(裂縫位置、類型和走向)的定量表達(dá)式。通過(guò)鋼筋混凝土梁的四點(diǎn)彎曲試驗(yàn),按照基于矩張量的聲發(fā)射分析方法,明確裂縫機(jī)制,并與試驗(yàn)結(jié)果比較,探討矩張量理論用于鋼筋混凝土結(jié)構(gòu)無(wú)損檢測(cè)的有效性。結(jié)果表明:對(duì)于鋼筋混凝土受彎構(gòu)件,基于矩張量的聲發(fā)射無(wú)損檢測(cè)技術(shù)能定量地描述結(jié)構(gòu)的裂縫機(jī)制,具有較好的準(zhǔn)確性。
[Abstract]:In order to quantitatively detect the damage of reinforced concrete members by acoustic emission technology, The theory of inversion focal mechanism of moment Zhang Liang in seismic engineering is applied to acoustic emission nondestructive testing of structures. The principle of acoustic emission detection technology based on moment Zhang Liang theory is expounded, and the inversion mechanism of crack (crack location) is deduced by using moment Zhang Liang theory. Through the four-point bending test of reinforced concrete beam, according to the method of acoustic emission analysis based on moment Zhang Liang, the crack mechanism is clarified, and the results are compared with the test results. The effectiveness of moment Zhang Liang theory in nondestructive testing of reinforced concrete structures is discussed. The results show that the technique of acoustic emission nondestructive testing based on moment Zhang Liang can quantitatively describe the crack mechanism of reinforced concrete flexural members. Good accuracy.
【作者單位】： 西安建筑科技大學(xué)土木工程學(xué)院;
【基金】：教育部“創(chuàng)新團(tuán)隊(duì)發(fā)展建設(shè)”項(xiàng)目(IRT-17R84) 國(guó)家自然科學(xué)基金項(xiàng)目(51008244) 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃項(xiàng)目(2015JM5173)資助
【分類號(hào)】：TU375

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