고층건물 SRC기둥의 확률론적 기둥축소량 해석 및 보정법

송화철,김형태 대한건축학회지회연합회 2018 대한건축학회연합논문집 Vol.20 No.2

고층건물의 기둥축소량해석을 하는 주된 목적은 시공중 수직부재간 부등축소량을 보정하는 것이다. 특히 SRC기둥의 길이 조정에 의한 보정시 공장에서 선작업을 하기 때문에 일정범위를 초과하는 과대 또는 과소 보정을 하지 않기 위한 조치를 해야 한다. 이 논문에서는 37층 고층건물을 대상으로 하여 SRC기둥의 축소량에 대한 보정 및 재보정 사례를 소개하고 확률론적으로 해석한 결과를 계측 결과와 비교․분석한다. 이를 통하여, 신뢰성기법을 활용한 합성부재인 SRC기둥에 대한 보정법을 제시하고자 한다. 본 연구에서 제시한 SRC기둥의 확률해석법을 이용하여 축소량의 신뢰구간별 상하한치를 제시할 수 있으며 초기 및 시공단계별 보정값을 제시할 때 과대 및 과소 보정을 방지하는데 활용할 수 있다. The main purpose in calculating predicted column shortening of high-rise buildings is to compensate for the differential length changes during construction. In this paper, the compensation and re-compensation method of column shortening is introduced for SRC columns in 37-story high-rise building. The probabilistic column shortenings are compared with the actual shortenings by field measurement and the compensation method of SRC columns using reliability analysis is suggested. In the probabilistic analysis of SRC columns, the shortenings can be presented with the upper and lower values of confidence level. The suggested method can be applied for preventing from overestimating and underestimating of compensation values of initial and under construction stage.

초고층건물 SRC기둥의 기둥축소량 보정법 및 현장계측

장승우,송화철 대한건축학회지회연합회 2005 대한건축학회지회연합회 학술발표대회논문집 Vol.1 No.1

Accurate prediction of time-dependent column shortening is essential for tall buildings from both strength and serviceability aspects. The compensation method is different from reinforced concrete and SRC(Steel Reinforced Concrete) members. The SRC columns are usually compensated according to total differential shortening between two vertical elements. In this study, column shortenings of 37-story W building under construction are predicted and compensated. The SRC column shortenings are compared with the actual column shortening by field measurement and the column shortenings are reanalysed and recompensated.

초고층 건물의 기둥축소와 지진하중에 대한 구조적 영향

정은호,김희철 한국지진공학회 1997 한국지진공학회논문집 Vol.1 No.3

대도시에서 초고층 건물의 필요성은 구조 기술자에게 새로운 문제를 안겨주었다. 기둥축소의 효과는 설계 및 시공에 있어 특별한 주의를 요구한다. 기둥의 축소는 칸막이, 마감, 그리고 설비체계와 같이 수직하중을 지탱하도록 고려되어 있지 않은 비구조적인 요소에 영향을 미친다. 또한 각 기둥의 축소량 차이는 주위의 슬래브 및 보와 같은 부재들을 경사지게 한다. 축소량을 예측하는 목적은 부등 축소량의 차이를 미리 보정하는데 있다. 본 연구는 부동 축소량에 의한 주구조부재의 영향에 대한 내용을 다루었다. 자중으로 인해 초지 수직변위를 갖는 52층 철근콘크리트 구조물에 지진하중을 적용하여 구조물에 미치는 영향을 평가하였다. 각 수직구조요소에 대한 축소량은 전산화된 기둥축소 해석 프로그램을 이용하여 예측되었으며 지진하중으로 인한 축소량이 보정된 구조물과 보정되지 않은 구조물 사이의 응력을 조사하였다. The necessity of a high-rise building in big cities gave a new problem to structural engineers. The shortening effect of vertical members needs special considerstion in the desigh and construction of high-rise buildings. The shortening of each column transfers load to nonstructural members such as partitions, cladding, and M/E systems which are not designed to carry gravity loads. Also, the slabs and beams will tilt due to the cumulative differential shortening of adjacent vertical members. The main purpose of estimating the total shortening of vertical structural members is to compensate the differential shortening between adjacent members. This paper presents the structural effect of differential shortening between in main structural members. Lateral earthquake load is applied to the 52 story concrete structure which has an initial vertical displacement due to the gravity load. Shortening amount for each vertical member was estimated using the computerized column shortening software. Comparison of stresses between the shortening corrected structure and the uncorrecated structure due to earthquake load was discussed.

사용성 한계상태를 적용한 초고층 콘크리트 건물 기둥축소량의 구조신뢰성평가

신영무,조용수,박수용,송화철 대한건축학회지회연합회 2008 대한건축학회지회연합회 학술발표대회논문집 Vol.2008 No.1

Differential shortening effects in tall concrete buildings causing cracks of partitions, curtain walls and pipe lines are a significant serviceability component. The paper describes a method for the structural reliability assessment on serviceability limit state of the time-dependent column shortening. The method is based on the probability analysis using monte carlo simulation. Based on the reliability index and probability of failure, the column shortening of 41-story tall concrete building is evaluated quantitatively and the compensation values are proposed considering target reliability index on the serviceability limit state.

초고층 건물의 Column Shortening보정에 미치는 영향요소

문일원,최기봉 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 논문집 Vol.22 No.1

The causes of column shrinkage and the codes that have been studied up to now are discussed. The documents mentioned in the code dealwith the drying shrinkage, creep, compressive strength and elastic modulus of the specimen, and the elastic deformation calculated from the structuralanalysis. However, the deformation due to the temperature caused by the long term monitoring is less than that caused by the factors generated bythe previous studies. In the previous studies, it was found that dehydration shrinkage, creep, and elastic deformation were not considered fortemperature-induced deformation, while for the specimen experiments, the temperature-related items were replaced with the humidity-related termsThe compensation value by the proposed equation showed error of 4.9 mm in the upper direction and 1.0mm in the lower direction when calculatingcolumn shortening, and it was found that its value by the proposed equation almost coincided with the measurement value in Site. Therefore, it isnecessary to further study the temperature that can be omitted in calculating the existing column shortening, to consider the influence factors, andto supplement the criteria for the temperature measurement of the structure as well as the specimen tests. 기둥축소량을 발생시키는 원인과 현재까지 연구되어온 코드에 대하여 고찰하였다. 코드에서 언급하고 있는 내용들은공시체의 건조수축, 크리프, 압축강도 및 탄성계수 그리고 구조해석에서 산출되는 탄성변형을 다루고 있으나, 장기간의 모니터링에 의해 나타나는 온도에의한 변형은 기존의 연구에 의해 발생되는 요소들에 의한 것보다 축소량이 적게 발생하는 것을 알 수 있었다. 하지만 기존의 연구에서는 온도에의한 변형에 대해서는 고려하지 않고 건조수축, 크리프 및 탄성변형에 대하여 다루고 있는 것을 확인 할 수 있고, 공시체의 실험에 대해서는 온도에 대한 항목은 습도에 대한 항으로 대체하여 다루고 있음을 알 수 있다. 이에 대해 제안식에 의한 보정수치는 축소량 산정시 상부방향 4.9 mm와 하부방향 1.0 mm의 오차를 나타내어 측정에 의한 수치와 거의 일치하는 것으로 나타났다. 따라서, 기존의 기둥축소량 산정에 있어서 누락될 수 있는 온도에 대하여 추가적으로 더 연구하여 그 영향계수를(수직온도보정계수,  ) 고려하고, 공시체의 시험뿐만 아니라 구조체의 온도보정에 관한 기준 보완이 필요한 것으로 파악되었다.

기둥축소량 보정법에 있어서 시공성 향상을 위한 RC 슬래브 표면마무리에 관한 연구

소광호 ( Kwang Ho Sho ),이재옥 ( Jea Ok Lee ),양극영 ( Keek Young Yang ) 한국건축시공학회 2003 한국건축시공학회 학술발표대회 논문집 Vol.3 No.1

Passage of time axial shortening in the cores and columns of tall concrete buildings requires special attention to ensure proper behavior for strength of the structure and the nonstructural element. The effects of column shortening, both elastic and inelastic, take on added significance and need special consideration in design and construction with increased height of structures. In this paper, the compensation method of column shortening for reinforced concrete structure are introduced. It could be concluded that the survey is a significant factor for the compensation instance of column shortening.

초고층 건물 수평부재 설계를 위한 기둥축소해석

김한수(Kim Han-Soo),정세훈(Jeong Se-Hun),신승학(Shin Seung-Hak) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.6

An improved column shortening analysis method which can be used in design phase of horizontal members has been proposed. The proposed analysis method consists of two stages, construction sequence column analysis and completion phase frame analysis. It can consider all the factors that affect the column shortening by separating in the two analysis stages. Column shortenings of 70-story reinforced concrete building were investigated as a numerical example. It is shown that this analysis method gives shortenings quite similar to the results by the accurate but complicated method. If you use this analysis method with the effective elastic modulus by EMM or AEMM, you can get more accurate internal forces which are less close than deformations when the normal modulus was used. This analysis method is also evaluated with CEB model and ACI model and the method is shown to be valid regardless of the concrete models.

KBC2016 탄성계수식을 적용한 초고층건물 기둥축소량 해석

황예원(Hwang, Ye-Won),송화철(Song, Hwa-Cheol) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.2

초고층 복합구조물의 기둥축소량 해석 및 보정

정석창 부천대학 2000 論文集 Vol.21 No.-

As buildings becomes more taller, column shortening effects disregarded in low-rise building must be considered in design process. Especially, differential column shortening between exterior and interior vertical members(column and shearwall) may cause the horizontal member to be tilted after construction of building. Moreever, differential shortening may induce additional stresses to horizontal members which may exceed the design capacity of memebers. In high-rise building, therefore, these adverse effects must be consider carefully in design stage and should be compensated in construction process of buildings. In this paper, the column shortening effect on composite building with exterior composite column having erection steel column and interior steel column is considered and the compensation process is also studied.

초고층 기둥축소량 보정을 위한 측량기법에 관한 연구

소광호(Sho Kwang-Ho),정동환(Jung Dong-Whan),양극영(Yang Keek-Young) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.5

Since the end of 20th century, the construction of high-rise buildings is greatly increased. The column of tall buildings is inherently vertically shortened and it causes several serviceability problems such as tilting of slab, crack within partition wall, deformation of curtain wall. Therefore, the column shortening has to be compensated at construction stage. To make sure the accurate compensation of column shortening, advanced and additional survey method is required. In this study, the basic survey method for tall building construction is briefly addressed. And the survey methods for the KLCC, TELEKOM H/Q, Plaza Rakyat projects are analytically examined. It could be concluded that vertical and horizontal levels has to be surveyed by the higher resolution equipment and combination of small and large zone survey is required.