装配式轻钢框架——混凝土夹心墙板结构抗震性能试验

Seismic performance experiments of the structure of assembled light steel frame-concrete sandwich wall panel

摘要

本文研发了一种自攻钉集块连接轻钢框架-混凝土夹心墙板结构，该结构具有高效抗震、保温节能和装配便捷等优势。为研究该结构的抗震性能，设计并制作了1个足尺轻钢框架试件和2个足尺自攻钉集块连接轻钢框架-混凝土夹心墙板结构试件。其中，内嵌式混凝土夹心墙板的内、外叶混凝土板均内嵌于轻钢框架内侧，半内嵌式混凝土夹心墙板的内叶和外叶混凝土板分别嵌入和外贴在轻钢框架上。通过低周反复荷载试验，分析了试件的破坏特征、滞回曲线、骨架曲线、承载力、变形能力、刚度退化、耗能能力及应变响应。结果表明，混凝土夹心墙板发生剪切破坏，轻钢框架柱脚形成塑性铰；轻钢框架-混凝土夹心墙板结构试件的极限承载力和初始刚度相比轻钢框架结构试件分别提高了18.80%~54.52%和201.86%~313.38%；内嵌式墙板试件的极限承载力和初始刚度比半内嵌式墙板试件显著提高；混凝土夹心墙板显著提高了结构的抗震性能，其具有结构承重、建筑围护、保温节能一体化特征，自攻钉集块节点连接可靠，混凝土夹心墙板和轻钢框架分别作为结构第1道和第2道抗震防线，二者协同工作性能良好。

Abstract

A new type of light steel frame-concrete sandwich wall panel structure connected with self-tapping screw clusters has been developed, which offers advantages such as high seismic efficiency, thermal insulation, energy saving, and convenient assembly. To investigate the seismic performance of this structure, one full-scale light steel frame specimen and two full-scale light steel frame-concrete sandwich wall panel structures connected with self-tapping screw clusters were designed and fabricated. In the embedded concrete sandwich wall panels, both the inner and outer wythe concrete panels are embedded inside the light steel frame. In the semi-embedded concrete sandwich wall panels, the inner wythe concrete panel is embedded into the light steel frame and the outer wythe concrete panel is attached to the outside of the light steel frame. Through low-cycle loading tests, the failure characteristics, hysteretic curves, skeleton curves, load-bearing capacity, deformation capacity, stiffness degradation, energy dissipation, and strain of the specimens were analyzed. The results showed that the concrete sandwich wall panels experienced shear failure, and plastic hinges appeared at the bottom of the light steel frame columns; the ultimate load-bearing capacity and initial stiffness of the light steel frame-concrete sandwich wall panel structure specimens increased by 18.80% to 54.52% and 201.86% to 313.38%, respectively, compared to the light steel frame structure specimen; the ultimate load-bearing capacity and initial stiffness of the embedded concrete wall panel specimens were significantly higher than those of the semi-embedded concrete wall panel specimens. The concrete sandwich wall panels significantly improved the seismic performance of the structure, and realize the integration of structural bearing, building enclosure and thermal insulation. The connection performance of self-tapping screw cluster joints is reliable. The concrete sandwich wall panels and light steel frame served as the first and second seismic defense lines of the structure respectively, and demonstrated good collaborative performance.

关键词

自攻钉集块 / 轻钢框架 / 混凝土夹心墙板 / 抗震性能

Key words

self-tapping screw / light steel frame / concrete sandwich wall panel / seismic performance

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基金资助

国家自然科学基金青年科学基金项目(52408190)

国家自然科学基金项目(52378116)