Development of Rational Design Method for Composite Structures with Steel Plates and Concrete

(1)通过对港口沉箱扶壁的加载试验，阐明了复合扶壁的极限承载力略大于钢筋混凝土扶壁的极限承载力，发生了混凝土的压缩破坏和随钢板屈服而发生的剪切破坏，观测到的承载力大于JSCE规范中深梁方程的预测值。(2)钢筋混凝土和复合支撑的纯扭转试验表明，两种类型的屈服弯矩相同，复合支撑屈服后的弯矩增大，可以应用Hsu的扩展解析方法进行预测。(3)夹层构件抗剪承载力试验与分析表明，无论是桁架模型还是静力不确定桁架模型，都能较好地评价仅布置隔板和布置全腹板和隔板两种情况下的抗剪承载力。在只有全腹板的情况下，对受压区、斜裂区、受剪钢筋板和法兰板在受压和受拉作用下所承受的剪力进行了深入的研究。(4)分别通过剪切连接件变形试验和压花钢板粘结试验，建立了剪切连接件变形力学模型，提出了剪切力传递强度计算模型。(5)采用RBSM对混凝土中预埋钢锚板的破坏进行了分析，能较好地预测其开裂情况。(6)空腹夹层板冲剪试验表明，其冲剪承载力比相同配筋率的RC板低30%。(7)通过钢护套加固混凝土柱的反循环加载试验，阐明了钢护套用量对延性及剪力分量随变形变化的影响。(8)提出了自密实混凝土砂浆合理配合比设计和掺量试验方法，阐明了粘度剂对新拌混凝土密实性能的影响。少

(1) From loading tests of buttresses in caissons for harbor it was clarified that ultimate capacities of composite buttresses are slightly greater than those of reinforced concrete (RC) buttresses, that compression failure of concrete and shear failure with yielding of steel plates take place, and that the observed capacities are greater than those predicted by the equation for deep beams in JSCE specification.(2) It was indicated by pure torsion tests of RC and composite buttresses that the yielding torsional moments are the same for both types, that the torsional moment increases after yielding in the case of composite buttress, and that the expanded analytical method by Hsu can be applied for prediction.(3) The experiment and analysis for shear capacities of sandwich members indicate that either truss model or statically indeterministic truss model evaluate the shear capacity in both cases in which only diaphragm is placed and in which full web and diaphragm are placed. In the case … More in which only full web is located, the through investigation on shear force components carried by compression zone, diagonal cracking zone, shear reinforcing steel plate and flange plates in compression and tension was conducted.(4) Establishment of a mechanical model on deformation of shear connector and proposal for calculation model of shear force transfer strength were made by conducting experiments on deformation of shear connector and bond of embossed steel plate, respectively.(5) The analysis on failure of steel anchor plate embedded in concrete was done by RBSM,which could predict cracking properly.(6) It was disclosed in the punching shear test of open sandwich slabs that the punching shear capacities are less by 30% than those of RC slabs with the same reinforcement ratio.(7) Effects of amount of steel jacket on ductility and variation of shear force components with deformation were clarified by the reversed cyclic loading test of RC columns retrofitted with steel jacket.(8) For self-compacting a concrete rational mix design for mortar and a cite test for total amount were proposed and the role of viscosity agent on compactability of fresh concrete was clarified. Less