Earticle

본 연구는 구조해석 프로그램 Midas-Gen을 이용하여 기둥-전단벽 구조의 수평강성 향상을 위한 방법을 모색하고자 하였다. 본 연구의 주요한 변수는 기둥과 전단벽의 배치방법이다. 기둥-전단벽 구조의 수평강성 향상을 위한 방법을 모색하기 위하여 최상층 수평강성을 비교분석하였다. 본 연구의 결과, 기둥과 전단벽의 배치방법은 기둥-전단벽 구조의 수평강성 향상에 영향을 미치는 것으로 나타났다. 또한 본 연구에서 제시된 해석연구의 결과는 합리적인 기둥-전단벽 구조설계 자료를 확보하는데 도움이 될 수 있다고 생각된다.

The goal of this research is to search the method of structural design for improvement of lateral stiffness in frame-shear wall structures, using the structural analysis program MIDAS-Gen. In this study, the main parameters of structural analysis were the layout method of column and shear wall etc. To look for the method of structural design for improvement of lateral stiffness in frame-shear wall structures, we analysed the lateral stiffness of top level which are the primary factors in the structural design of high-rise building. The study results indicated that the layout method of column and shear wall had an effect on the improvement of lateral stiffness in frame-shear wall structures. And the study results presented in this paper provided the basic data of structural design for the reasonable frame-shear wall structure in high-rise building.

This study presents stiffness-based optimal design to control quantitatively lateral drift of frame-shear wall structures subject to seismic loads. To this end, lateral drift constraints are established by introducing approximation concept that preserves the generality of the mathematical programming and can efficiently solve large scale problems. Also, the relationships of sectional properties are established to reduce the number of design variables and resizing technique of member is developed under the 'constant-shape' assumption. Specifically, the methodology of dynamic displacement sensitivity analysis is developed to formulate the approximated lateral displacement constraints. The 12 story frame-shear wall structural models is considered to illustrate the features of dynamic stiffness-based optimal design technique proposed in this study.

This study investigates the shear lag phenomenon existing in the shear wall of the wall-frame structure. Elastic analysis of such structures is carried out using a 3-D frame analysis program. The structural parameters governing the shear lag phenomenon are wall height and thickness. The analysis shows that the overturning moment due to external lateral load is resisted by both of the shear/core wall and the external frame. Severe unstable stresses are identified in height ratio of about 0.7 The taller or thinner wall shows the smaller shear lag phenomenon.

The purpose of this study is to develop a new seismic resistant method by using precast concrete wall panels for existing low-rise, reinforced concrete beam-column buildings such as school buildings. Three quasi-static hysteresis loading tests were experimentally performed on one unreinforced beam-column specimen and two reinforced specimens with L-type precast wall panels. The results were analyzed to find that the specimen with anchored connection experienced shear failure, while the other specimen with steel plate connection principally manifested flexural failure. The ultimate strength of the specimens was determined to be the weaker of the shear strength of top connection and flexural strength at the critical section of precast panel. In this setup of L-type panel specimens, if a push loading is applied to the reinforced concrete column on one side and push the precast concrete panel, a pull loading from upper shear connection is to be applied to the other side of the top shear connection of precast panel. Since the composite flexural behavior of the two members govern the total behavior during the push loading process, the ultimate horizontal resistance of this specimen was not directly influenced by shear strength at the top connection of precast panel. However, the RC column and PC wall panel member mainly exhibited non-composite behavior during the pull loading process. The ultimate horizontal resistance was directly influenced by the shear strength of top connection because the pull loading from the beam applied directly to the upper shear connection. The analytical result for the internal shear resistance at the connection pursuant to the anchor shear design of ACI 318M-11 Appendix-D except for the equation to predict the concrete breakout failure strength at the concrete side, principally agreed with the experimental result based on the elastic analysis of Midas-Zen by using the largest loading from experiment.