http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
홍건호 ( Hong Geon-ho ),백종삼 ( Baek Jong-sam ),박홍근 ( Park Hong-gun ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
Recently, the interest of precast concrete has increased in the construction sites. Prior to the use of precast concrete evaluation of structural performance is required. Hollow-core slab on the lateral loads should be the diaphragm action sufficient. The purpose of this study is to evaluate the in of plane shear resistance performance between hollow-core slab. To achieve this objective, according to the thickness of the topping concrete in of plane shear resistance performance of hollow-core slab was analyzed through experiments.
홍건호(Hong, Geon-Ho),최완철(Choi, Oan-Chul) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.6
Continued efforts to improve the bond strength were continuously achieved in order to prevent the increase of development and splice length by the development of high strength reinforcement. High relative rib area reinforcing bars by increasing the relative rib area were developed to improve the bond strength, however there is a limit to increase the bond strength because the increase of the rib height can cause the pullout failure. A few domestic researcher suggested new deformation pattern of bars with high and low height tranverse ribs, and these alternating ribs are expected to help limiting local shear failure and increase the bond strength significantly. They verified its bond performance by various experimental research results. But it is very difficult to reflect the bond strength increase in the design equation because most development design equations did not include the variables which reflect the deformation pattern of the bars. This study suggested the modified development design equation to consider the bond strength increase of the new deformation pattern of bars. Previoue research results and proposed design equations were synthesized and analyzed to draw a applicable equation for it. Proposed equation was based on the equation of ACI 408 committee, and replaced the relative rib area Rr to modified relative rib area Rr? using the weighted average of high and low rib height as 0.8 and 0.2 each. And the analysis of previous experimental results indicated that the restriction value of (cω+Ktr)/dbwas too conservative, and it is possible to extend it to 4.5.
고강도콘크리트와 고강도철근을 사용한 RC 보의 휨성능 평가
홍건호(Hong Geon-Ho) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.6
Recently, many research were performed to develop the high strength concrete and reinforcing bar because super tall building and large space structures require the high strength structural materials. The purpose of this paper is to evaluate the flexural performance of reinforced beams with high strength concrete and high strength reinforcing bars. Total 9 simple beam specimens divided by 3 groups tested for evaluating the flexural performance. Main test variables were concrete compressive strength from 27 to 68㎫ and yield strength of longitudinal reinforcement from 400 to 700㎫. Test data analyzed in the viewpoint of cracking load, ultimate flexural strength, load-deflection relationship, crack progress, failure aspects and ductility. Test results indicate that flexural capacity of the specimen is similar from a standpoint of unit strength-area of reinforcement regardless concrete compressive strength. Flexural stiffness of the specimens with high strength reinforcing bars were reduced, and this phenomenon is well agreed with the reduction of effective moment of inertia Ie. But stiffness reduction ratio was decreased when concrete compressive strength increase. Number of crack was decreased and maximum crack width was increased when concrete compressive strength increase.
강섬유보강 콘크리트를 사용한 무배근 연속슬래브의 구조성능
홍건호(Hong, Geon-Ho) 대한건축학회 2015 大韓建築學會論文集 : 構造系 Vol.31 No.8
Slab is one of the most important members in the building structures because it covers the largest area of the building. But, amount of reinforcement in this member is relatively small because of its small supporting loads. And large exposed area in slab can induce the cracks. To improve this characteristics, the new slab system consist of structural deck-plate and fiber reinforced concrete was suggested for improving construction ability and reduction of construction period. Basic concept of this slab system is that structural deck-plate can replace the tensile reinforcing bars and concrete form, and fiber reinforced concrete can replace the temperature reinforcement. But, previous study was limited because it tested only simply supported slab specimens. This study tested various continuous slab specimens to find the applicability of the suggested new slab system without any additional reinforcement. Design concept is that structural design of slab is assumed as simply support slab, but it should keep the negative moment cracks under allowable crack width in service load conditions. Four continuous slab specimens in total were tested for analyzing the flexural strength, stiffness, deflection, crack development and failure pattern. Test results indicated that suggested new slab system appeared to be better flexural capacity and stiffness than normal reinforced concrete slab with negative moment reinforcement. And it can control the cracks under the allowable crack width upto the service and factored loads.