shear transfer
2.The fields of axial velocity,the fields of secondary flow function and the distribution of wall shear stress along the transverse section of arterial wall were obtained under different Dean number,10≤ De ≤10 800.The concentration fields under different Dean number and Peclet number,10≤ De ≤2 000,1≤ Pe ≤4,were calculated in curved tube with permeable arterial wall and effects of parameters,such as shear stress,mass flux of arterial wall,on mass transfer were studied.
3.According to the pseudo static tests on two specimens of Transfer floor from inclined column to framed short-leg shear wall, which are subjected to the vertical loads and the horizontal cyclic loads, in this paper the stress distributions, final failure model of the specimens, paths of the load transfer and the mechanical behaviors of the transfer beam are studied in detail, the ductility and energy dissipation of the specimens are also specially studied.
5.To meet the demands for large space and flexible compartmentation of buildings,laminated vierendeel trusses are adopted in high-position transfer story structures.First the bearing characteristics are analyzed,in which reasonable stiffness ratio of the upper chord,middle chord,and lower chord is derived.Then combined with an actual engineering model (1∶8 similar ratio),the static loading and pseudo-dynamic tests of two models for laminated vierendeel truss used in transfer story structures are conducted,in which one model adopts reinforced concrete,and the other adopts prestressed concrete and shape steel concrete.Seismic behaviors are analyzed,including inter-story displacement,base shear-displacement skeleton curves,and equivalent viscosity-damping curves.A program is programmed to carry out the elasto-plastic dynamic analysis,and displacement time-history curves of the two models are derived.The test and analysis results show that the laminated vierendeel truss with prestressed concrete and shape steel concrete has excellent seismic behaviors.It can solve the disadvantages of laminated vierendeel trusses used in transfer story structures.Finally,some design suggestions are put forward,which can be referenced by similar engineering.
为满足建筑物大空间和灵活隔断要求,在高位转换层结构中采用迭层空腹桁架结构.首先分析了其受力性能,得出了空腹桁架各构件合理的截面刚度以及布局形式.然后结合一实际工程,进行了两榀迭层空腹桁架转换结构模型(1:8相似比)的竖向荷载下静力试验以及拟动力试验.其中一榀为普通混凝土迭层空腹桁架,另一榀配置了预应力和钢骨混凝土,对比分析了两模型的层间位移比、骨架曲线以及等效粘质阻力系数等抗震性能的比较,并进行了弹塑性动力分析.试验和分析结果表明,配置预应力和型钢混凝土的迭层空腹桁架转换结构具有良好的抗震性能,可以成功地解决迭层空腹桁架作为转换层结构所产生的弊端问题,最后对这类转换层结构提出了相应的设计建议.收藏指正
6.With the rapid development of high rise buildings in recent years, in order to meet the functional requirements, the lower part of many high rise buildings is always frame structure so that it can provide large space for commercial purpose, and the upper part is often used as residence or hotels which need relatively small space. Consequently, complex structural forms of high rise structure with high-level transfer floor and short-piered shear wall are proposed.
