Flexural Capacity of RC Composited H-Pile

Abstract

The composited structural member in which two or more materials having different stress-strain relationships (steel & concrete) has increased greatly in recent years. This paper presents the experimental results of flexural capacity of the composited H-Pile subjected to bending moment. Eight composited beams were tested under direct loading condition using the frame tester. Based on the experimental results it is noted that flexural capacity of composited H-Pile increased about 20~30% and ductility ratio significantly increased. Limit state analysis of the specimens was conducted and the result shows that flexural strength by limit state analysis is conservative.

Symbiotic copepods (Cyclopoida and Siphonostomatoida) collected by light trap from Korea

“… Anthessius graciliunguis Do & Kajihara, 1984 was described originally as an associate of the mussel Mytilus galloprovincialis Lamarck, 1819 from Japan ( Do and Kajihara 1984 ). Kim (1998 , 2010a ) recorded four additional bivalve host species in Korea: Mizuhopecten yessoensis (Jay, 1857), Pecten albicans (Schröter, 1802), Scaeochlamys squamata (Gmelin, 1791), and Solecurtus divaricatus (Lischke, 1869) in Korea. Ueda et al (2006) found this copepod species in plankton samples in Japan.…”

“…This species is the most frequently found artotrogid copepod in Korean waters; living on sponges, among sea weeds, and on submerged fishing nets in ports ( Kim 2010a ).…”

Nutrient variations from swine manure to agricultural land

“…In fact, looking over the mass balance within the boundary of land and animal breeding, the animal feeds are mostly coming from outside of the farm, then the nutrients in excreta can be over the demand of the crop growing near around the animal farm [ 4 – 6 ]. Adversely from trends of increasing manure production, the arable land of 2.11 million ha in 1990 has gradually decreased to 1.73 million ha in 2012 [ 7 ], which resulted in accumulation of surplus nutrients on arable land.…”

“…According to KREI (2013), the amounts of N and P applied on agricultural land were 380,000 and 150,000 tons, respectively, via both chemical fertilizer and livestock manure compost. Livestock manure compost contributes 31.6% and 40.0% for N and P, respectively [ 7 ].…”