비틀림 단면의 분할에 관한 연구

조순보 대한건축학회 1988 大韓建築學會論文集 Vol.4 No.5

수평하중이 작용하는 비대칭단면구조물의 부재력산정

조순보 수원대학교 산업기술연구소 1996 산업기술연구소논문집 Vol.11 No.-

The equation of governing such coupled lateral-torsional motion are fornulated for multistory buildings by means of finite element method. The unsymmetric plan buildingsdirections and torsion about the vertical(z) axes. The lateral stiffness of each plan and the intertia forces matrix on the mass component of the structures are defined. Each floor diaphragm, assumed to be rigid in its own plane has three DOFs defined at the center of mass. The DOFs for the jth floor are : translation u?? along the X-axes, translation u?? along Y-axes, and torsional rotational u?? about the vertical axes ; u?? and ?? and defined relative to the ground. Combining the response contribution of all the modes gives the total response of the unsymmetric-plan building to earthquake excitation. The structural dynamics computer programs are used to determine the natural frequency and natural mode of vibration.

지반탄성계수에 의한 기초설계

趙舜普 수원대학교 산업기술연구소 2003 산업기술연구소논문집 Vol.18 No.-

In the design and the analysis for foundations, conventional stiffness methods can be used where columns are regularly spaced in X and Y directions and column loads do not vary over 20%. In this case the calculation of foundation areas are accomplished by virtue of the earth pressure magnitude. It is necessary to use the modulus of subgrade reaction for the bending analysis of the foundations in order to obtain more accurate results. In finite analysis, the modulus of subgrade reactions at each nodes are included to the procedure of calculation of the foundation. So accuracy ratio of the finite element method results are higher than the conventional methods. In this paper, Authors studies the cause of the accuracy results being possible and the calculationsary compared.

水平力을 받는 構造物의 變位算定

趙舜普 水原大學校 1992 論文集 Vol.10 No.-

When a structure is subjected to earthquake motions, its displacement is limited to 1.5% of the height of its story. Occasionally in the displacement of longitudinal direction, the case which exceed the value of limits take place. Magnitude of displacement is calculated by the force method and finite difference method, and this paper deals with the method that the displacement is produced in the limit of value. Force method by virtue of computer program is employed.

건물의 내진성능평가 및 보강

조순보 水原大學校 2001 論文集 Vol.19 No.-

The essence of seismic evaluation procedures is a comparison between "demands" to "capacity" of the buildings to resist. The demand generated by the earthquake accelerations is a function of the stiffness of the structures. The capacity of a structures to resist seismic demand is a ductility which is a critical component of structural capacity. The capacity of a buildings and the demand imposed upon it by a given earthquake are not independent. ADRS curve reflect well these items. The intersection of the capacity and the demand curve define the actual displacement for the structures. After the performance point and the magnitude of deformations of a members estimate, the engineer can check the resulting performance of the buildings using a acceptability criteria. Similarly the engineer can check individual structural elements against acceptability limits tabulations and pinpoints deficiency with the structures. This facilitates a directed retrofits strategy that is both effective and cost efficiency. In this paper the process of ADRS evaluation and uncertainty and reliability of the performance are studied. The illustrative example is provided by SAP2000 program.

PT보의 2차 모우멘트 산정에 관한 연구

趙舜普 水原大學校 1995 論文集 Vol.13 No.-

How retraint actions in statically indeterminate prestressed concrete structures can be calculated and how they are influenced by the sequence of construction are a major matter of concern in the design of prestressed concrete structures. Restrain actions in prestressed concrete structures can be caused by the volume change of the concrete due to deformations resulting from the prestress. In order to calculate the magnitude of the 2nd moment and the strain of the prestressed beams, we make use of the principle of virtual work, the method of consistent deformation, the equivalent load method and moment distribution method. If we use the former methods, the quantity of the calculation are enormous and complex. So we need computer programming in order to obtain the solutions of the highest precisions. In most standard frame analysis program, the equally distributed load and the horizontal forces can be entered as input datas on each member required to obtain member forces. The calculations assuming that the structures has all been constructed and then the floor beams are post-tensioned one by one performed. Next we build the ground-floor. Then after post-tensioning the second floor beam, we build the second-floor until finally we build all the structures. The magnitude of member forces according to the sequence of the prestressing of beams are calculated.

垂直部材의 軸方向變位가 보設計에 미치는 영향

趙舜普 水原大學校 1991 論文集 Vol.9 No.-

Unequal strain of vertical member in the tall building design are produced by virtue of the construction work and the disproportion of the applied load. This unequal strain of the column has and effect on the quantity of beam end moment of the upper stories of the tall building. This paper studies the calculation of the end moment of the uppermost stroy of a building connected with unequal strain colum and provides more reasonable way of the beam design and cause of the unequal strain of cloumn. The moment and the axial strain of the stucture are caculated by the direct stiffness method and the slope deflection method.

탄성지반 위의 온통기초 설계에 관한 연구

조순보 水原大學校 1999 論文集 Vol.17 No.-

In the design and the analysis for the mat foundations, conventional stiffness methods can be used where columns are regularly spaced in X and Y directions and column loads do not vary over 20%. If the mat loading conditions are different from this, it is necessary to use the methods like the finite element methods for the bending analysis. The conventional stiffness methods use an assumed linear soil pressure diagram on the base of the mat. The spring contribution of mat foundations is not substituted in this method. In the finite element analysis, the difference of subgrade reactions at each nodes are reflected and torsional effect are included in the stiffness matrix. So accuracy ratio of finite element method outputs are higher than the conventional methods. In this paper, a difference of the two solutions are studied and the accuracy of the results of calculations are compared.

철근 콘크리트 구조 부재의 소성 해석에 관한 연구

趙舜普 水原大學校 1994 論文集 Vol.12 No.-

Consideration of the behavior of reinforced concrete frame at and near the ultimate load is necessary to determine the possible distribution of bending moment that could used in design. It is possible to use a distribution of moments diffrent from that given by linear structural analysis if critical sections have sufficient ductility to allow redistribution of actions to occur ad the ultimate load is approached. Because of rotations at some sections, it is possible for the bending moment to assume a pattern different from that drived from linear elastic structural analyses. Moment redistribution can have a marked influence on the ultimate load of statically indeterminate structure. Complexity of limit design and the computational effort are much great than those associated with design based on the elastic bending moment distribution. The future use of limit design procedure appears to depend on the ready availability of comprehensive computer program able to design structures and check behavior of all loading stage.

건물의 지진하중에 의한 횡변위추정

조순보 수원대학교 산업기술연구소 2002 산업기술연구소논문집 Vol.17 No.-

The response spectrum method and the time history numerical intergration method are usually used in the software of structural calculations for the dynamic analysis of seismic load buildings. IBC propose that the building of the less height of 73m with a regular shape can be designed by static load method as the building displacement results of static and dynamic analysis methods are almost similar in that situations. This paper studies the accuracy ratio of the lateral displacement quantity of buildings subjected to seismic loads by the proposed formulars and the statics methods, the response spectrum methods and the time history method by sap2000 software. This proposed formular for the lateral displacement calculation of the lateral displacement calculation of the seismic buildings would be usefull for the economic selection of the seismic resistant member size of beam and column in the buildings of the seismic zone.