格构配筋再生混凝土L形柱框架-轻质填充墙结构抗震试验分析

SEISMIC TESTS ON LATTICE REINFORCED L-SHAPED RECYCLED CONCRETE COLUMN FRAME STRUCTURES WITH LIGHT-WEIGHT INFILLED WALL

为改善异形柱框架结构的抗震性能,提出一种格构配筋再生混凝土L形柱框架-轻质填充墙结构。进行两个格构配筋再生混凝土L形柱框架-粉煤灰砌体填充墙结构的低周反复荷载试验,框架分为普通框架和带人字形支撑框架两种。基于试验,分析各试件的承载力、刚度、延性、滞回特性、耗能和破坏特征,找出结构损伤破坏的薄弱部位,阐明其屈服机制。研究表明:带人字形斜撑的格构配筋再生混凝土L形柱框架-轻质填充墙结构,承载力、延性和综合抗震性能均有显著提高。提出的格构配筋再生混凝土L形柱框架-轻质填充墙结构,简化了配筋,提高了工效,易于施工,成本较低,抗震性能良好。

In order to improve the seismic behavior of frame structures with special-shaped columns,a lattice reinforced L-shaped column frame with light-weight infilled wall structure was proposed.Seismic behavior tests of two full-scale L-shaped column frame with light-weight infilled fly-ash blocks specimens were conducted under quasi-static loading.The frame structures were divided into normal frame structures and frame structures with herringbone braces.Based on the experiments,the bearing capacity,stiffness,ductility,hysteretic characteristics,energy dissipation and failure characteristics of each specimen were analyzed comparatively.In addition,the weak positions of the structure had been found out.The yield mechanism had been revealed as well.The results showed that lattice reinforced Lshaped column frame structures with light-weight infilled wall and herringbone braces could significantly improve the bearing capacity ductilily and comprehensive seismic behavior.The proposed lattice reinforced special-shaped column frame with light-weight infilled wall structure,simplified the reinforcement form with the advantages of easy construction,low cost and good seismic behavior.