ABSTRACT

A new long-span assembly composite floor system for use in multi-column frame-tube structure is presented. The basic assembly unit consists of steel truss keel and profile sheet concrete composite slab, which of the two parts are combined together through shear stud. By means of standardized assembly connection structure, such a new floor system can realize a rapid assembly of floor and support frame. Based on test research of 1/3 scale model, the paper discusses the in-plane mechanical performance of the new floor system. Through loading at the direction of parallel to the assembly slab seam and perpendicular to the assembly slab seam, respectively, the influence of assembly orientation of floor units on the failure modes, distribution and transmission performance of the horizontal loads, and the in-plane stiffness were identified in detail. A numerical model was developed with its input parameters calibrated from full-scale experimental tests. Based on model analysis, the influence of thickness of concrete slab on the in-plane stiffness was discussed.

摘要

提出了一种用于多柱框架-管结构的新型大跨度装配式复合楼板系统。基本装配单元由钢桁龙骨和型材混凝土组合板组成，两部分通过剪力钉组合在一起。通过标准化的组装连接结构，这种新型地板系统可以实现地板和支撑架的快速组装。本文基于1/3比例模型的试验研究，探讨了新型地板系统的平面内力学性能。通过平行于拼装板缝方向和垂直拼装板缝方向的加载，分别研究了楼板单元的组装方向对水平荷载的失效模式、分布和传递性能以及面内刚度的影响被详细识别。开发了一个数值模型，其输入参数从全尺寸实验测试中校准。在模型分析的基础上，讨论了混凝土板厚度对面内刚度的影响。