http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
메탈라스로 횡구속된 고성능 콘크리트의 성능향상에 관한 기초적 연구
김은호 ( Jin¸ En-hao ),정덕우 ( Jung¸ Duk-woo ),전충근 ( Jeon¸ Chung-keun ),홍상희 ( Hong¸ Sang-hee ),한천구 ( Han¸ Cheon-goo ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.1
This paper is a fundamental study on the mechanical properties of the high performance concrete confined with metal lath laterally. According to the results, the compressive strength and flexural strength increases with increase of metal lath thickness due to enhancing confined force. The brittle failure is caused at maximum load in plain concrete. But, in case of concrete confined with metal lath laterally, strain stress increases a little. In flexural load curve, energy absorbtion increases with increase of metal lath thickness, so it resists continuous load, deflection and crack is retained. Length change ratio decreases with increase of metal lath thickness due to confined force.
[제1분과/비파괴검사 및 계측기술] 콘크리트의 초기 압축강도 추정에 P형 슈미트햄머의 활용
김종(Kim Jong),이용성(Lee Yong-Sung),정덕우(Jung Duk-Woo),이백수(Li Bai-Shou),윤기원(Yoon Gi-Won),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This paper investigate the applicability of P type Schmidt hammer for estimating early age compressive strength of concrete using 320data, which are collected varying with mixture proportion and material condition. Based on the Logistic regression analysis, low strength is calculated under low rebound number of P type Schmidt hammer and high strength is estimated under high rebound number of P type Schmidt hammer. The estimation equation between rebound number and compressive strength is obtained as followings; y=55.ll/[1+exp(-6.810g(x)+11)](R²=0.9294) From the statistical consideration, rebound number of P type Schmidt hammer to estimate 5MPa of compressive strength. which is capable of removing the side form is found to 28.6 with significant level of 5%
콘크리트의 초기 압축강도 추정에 P형 슈미트햄머의 활용
김종 ( Kim Jong ),이용성 ( Lee Yong-sung ),정덕우 ( Jung Duk-woo ),( Li Bai-shou ),윤기원 ( Yoon Gi-won ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
This paper investigate the applicability of P type Schmidt hammer for estimating early age compressive strength of concrete using 320data, which are collected varying with mixture proportion and material condition. Based on the Logistic regression analysis, low strength is calculated under low rebound number of P type Schmidt hammer and high strength is estimated under high rebound number of P type Schmidt hammer. The estimation equation between rebound number and compressive strength is obtained as followings; y=55.11/[1+exp(-6.81og(x)+11)](R<sup>2</sup>=0.9294). From the statistical consideration, rebound number of P type Schmidt hammer to estimate 5MPa of compressive strength, which is capable of removing the side form is found to 28.6 with significant level of 5%
PP纖維 混入 및 橫拘束에 의한 高性能 콘크리트의 爆裂 防止 性能
한천구(Han Cheon-Goo),황인성(Hwang Yin-Seong),정덕우(Jung Duk-Woo) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.1
This paper is an experimental study on the spalling resistance of high performance concrete with PP fiber contents and material for lateral confinement subjected to fire. According to the test results, spalling occurs to all specimens that do not contain PP fiber and it is prevented in the specimens containing PP fiber by more than 0.05% after heating, so it shows good effect on the spalling resistance. Metal lath shows the good effect on spalling resistance with increase of the thickness of it, and glass fiber and carbon fiber do not show good effect on the spalling resistance due to reduction of bond strength by high temperature. Spalling do not occur to all specimen that combine PP fiber with confinement of metal-lath, so spalling resistance performance is very good in this case. As the residual compressive strength is improved to about 90% of its original strength, the measures for safe can be taken against fire.