１前言在旧房改造工程中，常会涉及柱子的改造，如加柱、拔柱、换柱、接柱、增设牛腿、柱子加粗加长、柱子纠偏、小柱移位等，以增加建筑物的使用空间和平面承载能力。截柱扩跨就是其中一种常用的建筑改造措施，其目的是在不影响或少影响主体结构受力的情况下改造柱子、相应的 1 Introduction In the transformation of old houses, often involves the transformation of columns, such as plus columns, pulling columns, changing columns, then column, additional corbels, columns bold longer, column correction, small column shift, in order to increase the building The use of space and plane carrying capacity. One of the commonly used measures for retrofitting a building with truncated columns is to retrofit pillars without affecting or minimizing the stress on the structure of the main body. Correspondingly,