Studies on improvement of seismic performance for the structure members and constructions to an epicentral earthquake.

主要研究成果如下：1.以减小以内陆地震为代表的强震作用下的震害控制为目标，对抗震加固设计进行了研究。2.木结构抗震性能研究：(1)进行了实心木板房屋和房间大小的多孔板承重墙体的架设试验，验证了房间大小的承重墙体试验和有限元分析结果对全尺寸房屋水平性能的评估是可行的。(2)在木质承重墙架试验中，明确了木质承重墙体的水平刚度和强度随变形速度的变化规律，以及w-…的地震反应特性。承重墙体的加载速度对承重建筑的影响较大。3.对钢筋混凝土构件在静力和动力作用下的抗剪强度进行了试验研究和分析。将塑性理论应用于抗剪强度的估算，并进行了检验。试验内容依次为脉冲荷载或轴向荷载对柱的影响，以及双向荷载对实心墙的影响。4.将ALC板作为非结构单元。对这种幕墙在地震作用下的面内临界差异位移进行了试验研究，并尝试提出了一种合适的施工方法。阐明了结构形式和其他因素(如开孔配筋等)对临界差异运动的影响。通过粘结试验等方法检测粘贴在这种构件上的瓷砖剥落情况。5、对已有的钢筋混凝土结构进行了外贴钢板加固的抗震加固试验。采用单层试件和双层试件对机翼壁板进行加固。试验结果表明，在整体水平循环剪切荷载作用下，极限强度和延性都有所提高。在支撑体系中，无粘结支撑对延性钢筋混凝土框架有效，但对脆性框架不起作用。6.新型延性钢筋混凝土结构构件的研制：7个钢筋混凝土梁试件的钢套覆盖纵向钢筋，其长度与铰链区构件的深度几乎相同。结构试验验证了其良好的变形能力和较小的损伤。较少

The outline of the research results are as the following.1.Earthquake-resistant and retrofit design was studied with the aim of reduction of earthquake response and damage control under the severe earthquake as represented by the inland earthquake. And further, the prediction method of earthquake response and the guiding principle are proposed based on the analytical study for earthquake-resistant and retrofit design on the mid-story isolated system.2.Study on earthquake resistance, of wooden construction: (1) The racking tests on full sized wooden panel building and room sized perforated bearing walls were carried out, it was made clear that estimation of horizontal behavior of full sized buildings from the results of room sized bearing wall test and FEM analysis was available. (2) It was made clear that wooden bearing wall's horizontal stiffness and strength were variable by deformation velocity in the racking test of wooden bearing walls, and the behavior of earthquake response of w … More ooden building was influenced by loading velocity of bearing walls.3.The studies on experiments and analysis about the shear strength of the reinforced concrete members under a static or dynamic loading were done. The plastic theory was applied to the estimation of the shear strength and examined. The contents of the examination are as the next, the influences of the impuls load or axial load for the columns, and 2 directions load for the solid wall.4.ALC panel was taken up as nonstructural elements. The in-plane critical differential movement of this kind of curtain wall to an earthquake was experimented, and the proposal of an appropriate construction method ~vas tried. As a result, the influence of structural method and the other element (reinforcement for opening, etc) on the critical differential movements were clarified. Exfoliation of the tile stuck on this kind of elements was examined from the bond test, etc.5.Seismic retrofit tests were conducted for existing R/C structures strengthened with outside R/C member contained steel plate. Panel strengthened method was developed for the wing-wall using one and two layer specimens. Test results showed improved ultimate strength and ductility against holizontal cyclic shear load. In case of brace system, unbonded brace worked effectively for the ductile existing R/C frame, however didn't work functionally for the brittle frame.6.Development of the new ductile reinforced concrete structural members : The seven reinforced concrete beam specimens had steel sleeves covering longitudinal reinforcing bars of almost the same length as the depth of members at the hinge region were developed. The structural tests verified their excellent deformation capacity with minor damage. Less