In order to improve the seismic performance of Chinese traditional stele relics, a suitable aseismic strengthening method of Chinese traditional stele relics is proposed. Taking the typical stele relic in Xi＇an Beili...In order to improve the seismic performance of Chinese traditional stele relics, a suitable aseismic strengthening method of Chinese traditional stele relics is proposed. Taking the typical stele relic in Xi＇an Beilin as an example, the on-site investigations were carried out to obtain the actual geometric size and damage state of the stele relic. Then, the structural performance of the stele relic was analyzed by the finite element software ANSYS. Finally, the two different aseismic strengthening methods of the traditional stele relic are proposed and comparatively analyzed. The results show that in addition to the common problems, such as weathering, and cracks, etc, earthquakes seriously threaten the structural safety of stele relics. Under the rarely-occurring earthquake of eight degree, the unstrengthened stele relic will be overturned, and many cracks will occur at the connection area of stele body and stele pedestal. When the stele relic is strengthened by the stainless angle steel strengthening method, the stele relic will not be overturned, but some cracks will occur at the connection area of stele body and stele pedestal. When the stele relic is strengthened by the base isolation strengthening method, the stele relic will not be overturned, and no cracks will occur at the connection area of stele body and stele pedestal. Therefore, the aseismic strengthening effect of the base isolation strengthening method is obviously better than that of the stainless angle steel strengthening method, and this method is a suitable aseismic strengthening method of Chinese traditional stele relics.展开更多
The chinese upright stone tablets started building early inQindynasty which were called stone-carving in the Initial stage.After the Eastern Han Dynasty, they were gradually changed name as"tablets" or "...The chinese upright stone tablets started building early inQindynasty which were called stone-carving in the Initial stage.After the Eastern Han Dynasty, they were gradually changed name as"tablets" or "steles" with the increasing of carved stones. Greatnumbers of stone tablets standing like trees in forest, were later展开更多
Phytophthora fragariae causes drastic damage in strawberry crops.P.fragariae infects strawberry roots and causes red stele root rot.Although P.fragariae is a quarantine organism,its spread in Finland continues as more...Phytophthora fragariae causes drastic damage in strawberry crops.P.fragariae infects strawberry roots and causes red stele root rot.Although P.fragariae is a quarantine organism,its spread in Finland continues as more and more fields contract the disease.The spread can be halted through developing rapid and reliable detection assays.We have developed a rapid recombinase polymerase amplification(RPA)assay for P.fragariae targeting the Phytophthora mitochondrial DNA intergenic atp9-nad9 marker.The assay is DNA-extraction free and capable of detecting as low as 10 fg of P.fragariae genomic DNA.We found the assay reliable for diagnosing field plants when samples are adequately collected.We also applied the RPA assay to the detection of the pathogen in the soil through coupling the assay with baiting with the host plant.The results suggest that if only a small number of samples are analysed,the baiting results will not be reliable.展开更多
基金The National Natural Science Foundation of China(No.51578127,51778122)the Foundation for the Author of National Excellent Doctoral Dissertation of China(No.201452)the Fundamental Research Funds for the Central Universities(No.2242016K41065)
文摘In order to improve the seismic performance of Chinese traditional stele relics, a suitable aseismic strengthening method of Chinese traditional stele relics is proposed. Taking the typical stele relic in Xi＇an Beilin as an example, the on-site investigations were carried out to obtain the actual geometric size and damage state of the stele relic. Then, the structural performance of the stele relic was analyzed by the finite element software ANSYS. Finally, the two different aseismic strengthening methods of the traditional stele relic are proposed and comparatively analyzed. The results show that in addition to the common problems, such as weathering, and cracks, etc, earthquakes seriously threaten the structural safety of stele relics. Under the rarely-occurring earthquake of eight degree, the unstrengthened stele relic will be overturned, and many cracks will occur at the connection area of stele body and stele pedestal. When the stele relic is strengthened by the stainless angle steel strengthening method, the stele relic will not be overturned, but some cracks will occur at the connection area of stele body and stele pedestal. When the stele relic is strengthened by the base isolation strengthening method, the stele relic will not be overturned, and no cracks will occur at the connection area of stele body and stele pedestal. Therefore, the aseismic strengthening effect of the base isolation strengthening method is obviously better than that of the stainless angle steel strengthening method, and this method is a suitable aseismic strengthening method of Chinese traditional stele relics.
文摘The chinese upright stone tablets started building early inQindynasty which were called stone-carving in the Initial stage.After the Eastern Han Dynasty, they were gradually changed name as"tablets" or "steles" with the increasing of carved stones. Greatnumbers of stone tablets standing like trees in forest, were later
基金supported by the European Agricultural Fund for Rural Development(EAFRD),Pohjois-Savon ELY-Keskus.
文摘Phytophthora fragariae causes drastic damage in strawberry crops.P.fragariae infects strawberry roots and causes red stele root rot.Although P.fragariae is a quarantine organism,its spread in Finland continues as more and more fields contract the disease.The spread can be halted through developing rapid and reliable detection assays.We have developed a rapid recombinase polymerase amplification(RPA)assay for P.fragariae targeting the Phytophthora mitochondrial DNA intergenic atp9-nad9 marker.The assay is DNA-extraction free and capable of detecting as low as 10 fg of P.fragariae genomic DNA.We found the assay reliable for diagnosing field plants when samples are adequately collected.We also applied the RPA assay to the detection of the pathogen in the soil through coupling the assay with baiting with the host plant.The results suggest that if only a small number of samples are analysed,the baiting results will not be reliable.
