底部框架-抗震墙房屋框架地震剪力的计算

对底部框架 -抗震墙房屋框架所承担的地震剪力计算方法进行了讨论。指出当底部只有一层框架 -抗震墙以及底部有两层框架 -抗震墙 ,但其抗震墙高宽比h b≤ 1时 ,框架承担的地震剪力可按各抗侧力构件的侧向刚度比例分配。而对于抗震墙 1相似文献   

化工厂房钢筋混凝土框架节点抗震设计

通过分析化工厂房钢筋混凝土框架节点在地震作用下破坏特征,结合框架结构的变形特点,针对化学介质的腐蚀性,提出了提高框架节点抗剪强度、优化抗震设计的措施。     

柱加大截面加固与碳纤维加固框架节点的试验研究与比较

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Electro-elastic fields of piezoelectric materials with an elliptic hole under uniform internal shearing forces

The existing investigations on piezoelectric materials containing an elliptic hole mainly focus on remote uniform tensile loads. In order to have a better understanding of the fracture behavior of piezoelectric materials under different loading conditions, theoretical and numerical solutions are presented for an elliptic hole in transversely isotropic piezoelectric materials subjected to uniform internal shearing forces based on the complex potential approach. By solving ten variable linear equations, the analytical solutions inside and outside the hole satisfying the permeable electric boundary conditions are obtained. Taking PZT-4 ceramic into consideration, numerical results of electro-elastic fields along the edge of the hole and axes, and the electric displacements in the hole are presented. Comparison with stresses in transverse isotropic elastic materials shows that the hoop stress at the ends of major axis in two kinds of material equals zero for the various ratios of major to minor axis lengths; If the ratio is greater than 1, the hoop stress in piezoelectric materials is smaller than that in elastic materials, and if the ratio is smaller than 1, the hoop stress in piezoelectric materials is greater than that in elastic materials; When it is a circle hole, the shearing stress in two materials along axes is the same. The distribution of electric displacement components shows that the vertical electric displacement in the hole and along axes in the material is always zero though under the permeable electric boundary condition; The horizontal and vertical electric displacement components along the edge of the hole are symmetrical and antisymmetrical about horizontal axis, respectively. The stress and electric displacement distribution tends to zero at distances far from the elliptical hole, which conforms to the conclusion usually made on the basis of Saint-Venant’s principle. Unlike the existing work, uniform shearing forces acting on the edge of the hole, and the distribution of electro-elastic fields     

多层砖混房屋钢筋混凝土构造柱施工质量控制

分析了钢筋混凝土构造柱的作用和构造要求,并针对其施工中常见的质量通病作了阐述,根据工程的不同施工条件和设计要求,提出了具体的施工质量控制措施,从而改善砌体结构的抗震性能。     

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变形缝剪力墙钢木组合式大模板的应用与分析

通过对变形缝处剪力墙结构当前模板工程应用情况的分析,提出了优化的钢木组合式大模板施工方法,并对该方法的施工注意事项、优点及不足作了说明,对于同类工程施工有一定的借鉴作用。     

界面层剪切试验方法综述

采用界面剪切试验方法对不同材料组成的复合结构层间抗剪性能进行了研究,通过对比分析不同情况下的界面层剪切试验方法,探讨了其常用试验方法的使用情况及优缺点,并提出采用局部脱空叠层梁模型研究的试验方法,为界面层非线性粘结滑移状态的剪切特性试验研究提供参考。     

冷拔钢丝预应力混凝土圆孔板的斜截面承载力

冷拔钢丝预应力圆孔板是广泛使用的结构构件.但关于它的斜截面承载能力目前研究尚少,在规范中也尚无具体规定.本文在试验研究的基础上指出圆孔板斜截面破坏有两种类型,配置箍筋不能提高其受剪承载力,并给出了简单实用的斜截面承载力计算公式。