建筑结构竖向构件受力位移角计算方法及其限值研究

结构受力层间位移角是准确判别结构倒塌破坏的关键参数。通过计算构件反弯点或虚拟反弯点，建立了结构竖向构件计算受力位移角与试验位移角的对应关系，采用结构区格剪切变形建立了填充墙计算受力位移角与试验位移角的关系。在进行多遇地震和风荷载作用下的结构楼层弹性判别时，采用竖向构件计算受力位移角结合构件试验开裂的位移角进行判别较为准确。根据构件试验，给出柱和剪力墙的开裂位移角均值分别是1/350和1/1600，90%保证率下的开裂位移角分别是1/550和1/2300；填充墙开裂位移角限值与连接方法有关，普通连接开裂位移角均值为1/800，90%保证率下的开裂位移角为1/1500；柔性连接开裂位移角均值为1/600，90%保证率下的开裂位移角为1/700。对多遇地震作用下的框架结构和框架剪力墙结构分析表明，按规范要求控制楼层变形时，框架柱和剪力墙的受力变形小于其开裂位移角均值和90%保证率下的开裂位移角，填充墙普通连接时不能满足不开裂的要求，柔性连接时基本满足不开裂的要求。

A study on calculation method and limit of drift angle for vertical member stress of building structure

The force-induced story displacement angle of the structure is the key paramater to accurately judge the collapse of the structure. In this paper, the corresponding relationship between the calculated displacement angle and test displacement angle was established through the component inflection point or virtual inflection point. The shear deformation of the structural zone was used to establish the relationship between force induced displacement angle and test displacement angle of infilled walls. In this way, the story elastic deformation under frequent earthquakes and wind loads can be judged more accurately by the displacement angle of the test component. The mean values of the cracking displacement angles of columns and shear walls are 1/350 and 1/1600, respectively, the cracking displacement angles with 90% assurance rate are 1/550 and 1/2300, respectively. The limit value of the infill wall is related to the connection method. The mean value of the cracking displacement angle of the ordinary connection is 1/800 and the value with 90% assurance rate is 1/1500. The mean value of the cracking displacement angle of the flexible connection is 1/600 and the value with 90% assurance rate is 1/700. Under frequent earthquakes, the analysis of the frame structure and framed shear wall structure shows that the deformation of the columns and shear wall is less than both the mean value of the cracking displacement angle and the angle with 90% assurance rate when the structural displacement angles are controlled by the code. The ordinary connection cannot meet the requirements of avoiding cracking in infill walls, but the flexible connection meets the mean value of displacement angle.