一、前言 随着社会主义市场经济的发展,对临街商业建筑和人们公共活动频繁地带的建筑提出了更高的要求。临街层及其上二、三层一般要求具有较大的空间,而每层的层高又必须尽量压低以满足使用、经济两方面的要求。过去常用的结构方案是大跨度方向设框架主梁,小跨度方向为柱间连系梁,采用预制或现浇楼板。这种结构方案便于施工,楼盖底较为 I. INTRODUCTION With the development of the socialist market economy, higher requirements have been put on the construction of commercial buildings on the street and people’s frequent public activities. The street level and the upper two and three floors above it generally require a relatively large space, and the floor height of each floor must be as low as possible to meet the requirements of both use and economy. In the past, the commonly used structural scheme was to set the main girder in the direction of large span, and the small span direction was to connect beams between columns, using prefabricated or cast-in-place floor slabs. This structure scheme is convenient for construction, and the bottom of the floor is relatively