LI Yuhang,DENG Yang,LI Aiqun.Research on Damage Identification of Concrete Slab based on Frequency Change[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1028-1036.
LI Yuhang,DENG Yang,LI Aiqun.Research on Damage Identification of Concrete Slab based on Frequency Change[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1028-1036. DOI: 10.13409/j.cnki.jdpme.201906016.
Research on Damage Identification of Concrete Slab based on Frequency Change
The damage identification method of slab based on modal frequency variation of slab is proposed. The relationship between slab damage and frequency is studied by numerical simulation. Firstly, the slabs are composed of the layered slab and integral slab, which are applied with the linear and cyclic loading with equal amplitudes, respectively, and the modal test was carried out on slabs which are applied with the cyclic loading with equal amplitudes. On this basis, a refined numerical simulation method is proposed and the results calculated by numerical simulation are compared with those produced by the linear loading test. Finally, the finite element numerical simulation method is used to calculate the existing damage based on the overall structure and the damage based on the slab frequency variation. The results reveal that: 1) the frequency of the slab after cracking is lower than the frequency of the slab before the cracking, and the frequencies of layered slabs before and after the cracking are similar to the integral frequency of slabs correspondingly. 2) The cracking damage performance of the slab based on modal variation before and after cracking can be accurately simulated by the refined finite element numerical simulation method. 3) The existing damage identification method based on the frequency variation of the overall structure can not accurately reflect the damage performance of the slab. 4) The damage identification method based on the variation of the floor frequency calculated by numerical simulation can accurately reflect the crack damage performance of the slab. The method can provide a reference for the damage identification of the slab.
Yi W J , Xu L . Study on damage diagnosis of reinforced concrete floor using vibration method [J]. Journal of Vibration and Shock , 2003 , 22 ( 2 ): 23 - 25 . (in Chinese)
Araujo Dos Santos J V , Katunin A , Lopes H . Vibration-based damage identication using wavelet transform and a numerical model of shearography [J]. International Journal of Structural Stability and Dynamics , 2019 , 19 ( 4 ): 1950038 .
Jamadin A , Ibrahim Z , Jumaat M Z , et al . Effect of high-cyclic loads on dynamic response of reinforced concrete slabs [J]. KSCE Journal of Civil Engineering , 2019 , 19 ( 3 ): 1950038 .
Patrik F , Peter U . Detecting damage events in concrete using diffuse ultrasound structural health monitoring during strong environmental variations [J]. Structural Health Monitoring , 2018 , 17 ( 2 ): 410 ⁃ 419 .
Xia Zh H , Li J W , Xia J , et al . Seismic performance assessment of brick masonry structures with precast slabs based on deterioration of frequency [J]. Industrial building , 2015 , 45 ( 4 ): 92 - 97 . (in Chinese)
Ye X G , Zhong X , Li K N , et al . Study of pushover analysis procedure and reversal load pattern [J]. Journal of Hefei University of Technology (Natural Science) , 2001 , 24 ( 6 ): 1019 - 1024 . (in Chinese)
Shi W X , Wang Y , Liu Ch Q . Damage analysis of high-rise building under seismic load based on frequency measurement [J]. Journal of Southwest Jiaotong University , 2007 , 42 ( 4 ): 389 - 394 . (in Chinese)
Guo H Y , Li Zh L . An improved information method based on modal strain energy and frequency for structural mutiple damage identification [J]. Journal of Basic Science and Enginnering , 2008 , 16 ( 5 ): 719 - 725 . (in Chinese)
Zhang G W , Gao Y Ch , Wang Sh , et al . Damage assessment of concrete-filled steel tube column based on deterioration of frequency [J]. Structural Engineers , 2017 ( 6 ): 116 - 122 . (in Chinese)
Ghobarah A , Abou-elfath H , Ashraf Biddah . Response-based damage assessment of structures [J]. Earthquake Engineering and Structural Dynamics , 1999 , 28 : 79 - 104 .
Chen Y J , Qian Y Y , Li H Q , et al . Damage detection and tests for a RC simply supported girder bridge based on its damping characteristics [J]. Journal of Vibration and Shock , 2017 , 46 ( 13 ): 208 - 214 . (in Chinese)
Abdollah B , Mohamad A , Osman E O , et al . Identification of flexural rigidity in bridges with limited structural information [J]. Journal of Structural Engineering , 2018 , 144 ( 8 ): 04018126 .
Shi Zh , Zhao R D . Effects of bridge damage on its free-vibration characteristics [J]. Journal of Earthquake Engineering and Engineering Vibration , 2007 , 27 ( 5 ): 117 - 123 . (in Chinese)
Guo G H , Yi W J . A Numerical study on the damage assessment of a simply- supported beam on natural frequencies [J]. Journal of Chongqing Jianzhu University , 2001 , 23 ( 2 ): 17 - 21 . (in Chinese)
Zhou X Q , Hou R R , Wu Y H . Structural damage detection based on iteratively reweighted l1 regularization algorithm [J]. Advances in Structural Engineering , 2019 , 22 ( 6 ): 1479 - 1487 .
Muhammad U H , Zainah I , Mohammed J , et al . Simulation-based non-linear vibration model for damage detection in RC beams [J]. European Journal of Environmental and Civil Engineering , 2019 .
Norihiko O , Hitoshi Y , Takahiro N , et al . Damage evaluation of an internal concrete in steel-plate bonded slabs with anchor-bolts [J]. Construction and Building Materials , 2018 , 177 : 247 ⁃ 251 .
Xie J , Han D J . An improved method for structure damage detection based on frequency measurement [J]. Engineering Mechanics , 2004 , 21 ( 1 ): 21 - 25 . (in Chinese)
Han J P , Dong X J , Zhou W . Model updating for RC frame based on shaking table test and identification of simulated damage [J]. Journal of Earthquake Engineering and Engineering Vibration , 2010 , 30 ( 5 ): 87 - 92 . (in Chinese)
Clotaire M , Amin K , Pierino L . Evaluation of the seismic retrofitting of an unreinforced masonry building using numerical modeling and ambient vibration measurements [J]. Engineering Structures , 2018 , 158 : 124 ⁃ 135 .
Ai J , Shan G , Wang X W , et al . Study on dynamic characteristics of damaged RC beam strengthened by prestressed CFRP sheets [J]. Journal of Vibration and Shock , 2011 , 30 ( 3 ): 119 - 123 . (in Chinese)
Wang L H , Zhou X Y , YanW M . Experimental studies on monitoring reinforced concrete beam's damage degree using responses' maximums in impact excitation vibration tests [J]. Journal of Vibration and Shock , 2006 , 25 ( 1 ): 90 - 94 . (in Chinese)
Pu Q H , Hong Y , Chen L J , et al . Model updating–based damage detection of a concrete beam utilizing experimental damped frequency response functions [J]. Advances in Structural Engineering , 2019 , 22 ( 4 ): 935 - 947 .