CAJ | 학술논문

实际的梁结构大多因具有不一致的局部抗弯刚度而影响到对其真实损伤的识别。为了准确地发现损伤，进而实现梁结构的状态预警，需要区分出真实损伤和初始抗弯刚度的不一致性。为此，首先将完好的梁划分成n个区间，以各区间的抗弯刚度作为未知量，然后考察梁在n次加载下的跨中位移响应，得到一组线性方程，求解后可得到真实的局部抗弯刚度值。当梁发生损伤后，重复进行一次同样的过程，可以得到一组新的局部抗弯刚度值。通过对比这两组局部刚度数据即可获得真实的损伤信息。研究结果表明：新方法可以有效地区分真实损伤和局部刚度的初始不一致，从而提高状态预警的准确性。
실제적량결구대다인구유불일치적국부항만강도이영향도대기진실손상적식별。위료준학지발현손상，진이실현량결구적상태예경，수요구분출진실손상화초시항만강도적불일치성。위차，수선장완호적량화분성n개구간，이각구간적항만강도작위미지량，연후고찰량재n차가재하적과중위이향응，득도일조선성방정，구해후가득도진실적국부항만강도치。당량발생손상후，중복진행일차동양적과정，가이득도일조신적국부항만강도치。통과대비저량조국부강도수거즉가획득진실적손상신식。연구결과표명：신방법가이유효지구분진실손상화국부강도적초시불일치，종이제고상태예경적준학성。
Most real world beam structures have inconsistent local flexural stiffness , which makes the detection of actual damage difficult .In order to detect the damage precisely and to achieve early warning of beam structures status , it is necessary to distinguish the actual damage from the uncer-tainty of initial local flexural stiffness .For this purpose , an intact beam was divided into n partitions firstly in this study .Local flexural stiffness values of each partition were seen as unknown parame-ters.Subsequently , the mid-span displacement reactions of the beam under n kinds of load were studied , and then a group of linear equations were established .By solving these equations , values of flexural stiffness parameters can be obtained .When the beam is damaged , the same process should be carried out once again , and a new group of flexural stiffness parameters can be obtained .By com-paring these two groups of stiffness parameters , real damage information can be discovered .Re-search results show that actual damage and uncertainty of initial local flexural stiffness can be differ -entiated by this new method effectively .The effect of early warning system can be improved accord-ingly.