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High strength steel composite Y-type eccentrically braced frame is a new dual resistance structural system, in which the link is made from steels with low yield strength and the others are made from high strength steel. In order to study the seismic behavior, four one-bay and one-story 1/2 scaled plane specimens were tested under monotonic and cyclic loading respectively. According to the length of link, the specimens were classified into two group; flexural yielding and shear yielding. The failure modes and the main seismic behavior indices of specimens with various link lengths of energy disspation were analyzed. The results indicate that this new structural system is good at energy dissipation and ductility. The bearing capacity of shear yielding specimens is higher than flexural yielding specimens, the ductility of the former is better than the latter, and the energy absorbed in the former is bigger than the latter at the same displacement. In cyclic testing, the main failures of shear yielding specimens were concentrated at links, while the other parts of eccentrically braced frame kept in elastic status. This kind of structure is an excellent dual resistance system and easy to rehabilitate after earthquake. [ABSTRACT FROM AUTHOR]

High strength steel composite K-type eccentrically braced frame is a new structural system, in which the link is made from steels with low yield strength and the others are made from high strength steel. In order to study the seismic behavior of such a structure, four one-bay one-story 1 : 2 scaled plane specimens were tested under the monotonic and cyclic load respectively. The failure modes and the main indexes of seismic behavior of specimens with various links length were analyzed. The results show that this new structural system is good at energy dissipation and ductility, and the way of energy absorbing by shear yielding is better than by flexural yielding. The ultimate displacement of monotonic test is greater than cyclic test, the bearing capacity of the former is higher than the latter, but the bearing capacity of the former is lower than the latter at the same displacement. In cyclic testing, the main failures were concentrated at links, while the other parts of the eccentrically braced frame keep in elastic status. This kind of structure is an excellent dual resistance system and easy to rehabilitate after earthquake. [ABSTRACT FROM AUTHOR]

Reynoutria japonica Houtt., belonging to Polygoneae of Polygonaceae, is a Chinese medicinal herb with the functions of draining dampness and relieving jaundice, clearing heat and detoxifying, dispersing blood stasis and relieving pain, and relieving cough and resolving phlegm. In this study, we carried out high-throughput sequencing for the chloroplast genome sequences of five cultivars of R . japonica and analyzed the genome structure and variations. The chloroplast genomes of the five R . japonica cultivars had two sizes (163 376 bp and 163 371 bp) and a typical circular tetrad structure composed of a large single-copy (LSC) region of 85 784 bp, a small single-copy (SSC) region of 18 616 bp, and a pair of inverted repeat (IR) regions (IRa/IRb) which are spaced apart. A total of 161 genes were obtained by annotation, which consisted of 106 protein-coding genes, 10 rRNA-coding genes, and 45 tRNA-coding genes. The total GC content was 36.7%. Specifically, the GC content in the LSC, SSC, and IR regions were 34.8%, 30.7%, and 42.7%, respectively. Comparison of the whole chloroplast genome among the five cultivars showed that trnk - UUU , rpoC1 , petD , rpl16 , ndhA , and rpl12 in coding regions had sequence variations. In the phylogenetic tree constructed for the 11 samples of Polygoneae, the five cultivars of R . japonica clustered into one clade near the root and was a sister group of Fallopia multiflora (Thunb.).