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我国近年来几次大地震的建筑震害表明,框架房屋中的砖填充墙,地震时与框架一同抵抗了地震荷载,同时也给框架造成了局部损害。因此,在地震内力分析时,应根据这一实际情况,考虑砖墙的刚度和强度。文中建议,当采用弹性反应谱理论进行设计时,应取主体结构(即框架)处于弹性阶段最终时刻各类构件(框架和填充墙)的实际刚度来确定房屋的周期。分配地震剪力时,按照填充墙的有效强度来确定它所分担的一部分地震荷载。此外,又根据国内外关于填充墙框架模型试验的实测数据,给出砖填充墙的实际刚度、有效强度的具体数值和有关计算公式。最后,还给出砖墙对框架反作用力的计算方法和构造。
Earthquake damage to the buildings of several major earthquakes in recent years in China indicates that the brick-filled walls in the framed houses, together with the frame during the earthquake, resisted earthquake loads and caused partial damage to the frame. Therefore, in the analysis of earthquake internal forces, the rigidity and strength of the brick wall should be taken into account based on this actual situation. It is suggested that when using the theory of elastic response spectrum design, the actual stiffness of various components (frames and infill walls) at the final moment of the elastic phase of the main structure (ie, the frame) should be taken to determine the housing cycle. When assigning the seismic shear force, a part of the seismic load it shares is determined according to the effective strength of the infill wall. In addition, according to the actual measurement data of the infill wall frame model at home and abroad, the actual values of the actual stiffness and effective strength of the brick-infilled wall and the related calculation formulas are given. Finally, the calculation method and structure of the reaction force of the brick wall to the frame are also given.