多腔波形钢板组合墙的轴压整体稳定性能研究  

Stability behavior of multi-celled corrugated-plate concrete filled steel tubular walls

作　　者：童精中 俞超群 童根树[1] 陈明 张磊[1] TONG Jingzhong;YU Chaoqun;TONG Genshu;CHEN Ming;ZHANG Lei(Institute of Advanced Engineering Structures,Zhejiang University,Hangzhou 310058,China;Nantong Open Construction Technology Co.,Ltd.,Nantong 226000,China)

机构地区：[1]浙江大学高性能结构研究所,浙江杭州310058 [2]南通欧本建筑科技有限公司,江苏南通226000

出　　处：《建筑结构学报》2023年第5期240-251,285,共13页Journal of Building Structures

基　　金：浙江省自然科学基金探索计划(LQ21E080018)。

摘　　要：为了降低钢板混凝土组合墙的用钢量、提高其承载效率,同时避免大量使用剪力连接件,提出了多腔波形钢板组合墙,该组合墙由钢管混凝土柱和内填混凝土的双波形钢板交替连接组成。为了得到墙体稳定承载性能的影响因素,对6片高厚比为20.0和16.7的多腔波形钢板组合墙进行轴压试验,其中波形钢板包括梯形波折板和正弦波浪板两类。试验结果表明:试件承载力均由整体稳定控制,加载过程中所有墙体都出现了整体失稳破坏并伴随钢板局部屈曲,而波形钢板与钢管间的焊缝保持完好;增加墙体厚度(即降低高厚比)可以有效提高试件稳定承载力。采用ABAQUS软件建立精细化有限元分析模型,并将试验结果与有限元模拟结果进行对比,发现有限元能较好模拟多腔波形钢板组合墙的轴压整体稳定性能。采用经验证的有限元模型分析了高厚比、截面尺寸、混凝土强度以及波形钢板形式对组合墙轴压稳定性能的影响,发现钢管混凝土柱的板厚和宽度对承载力的影响随组合墙高厚比的增大逐渐增大,波形腔宽度和混凝土强度的影响随高厚比的增大逐渐减小,波形钢板厚度和波形钢板形式对承载力影响较小。提出了多腔波形钢板组合墙稳定系数的计算公式,有限元结果与公式计算结果的比值大部分在1.00~1.10之间,可以偏安全地预测试验结果。In order to reduce the consumption of steel material,improve the load-resistant efficiency and avoid excessive use of shear connecters in steel-concrete composite walls,the multi-celled corrugated-plate concrete filled steel tubular wall(MCCFSTW)was proposed.An MCCFSTW consists of CFSTs and double-corrugated steel plates filled with concrete.Six MCCFSTW specimens with a height-to-depth ratio of 20.0 or 16.7 were tested to study the stability performance of the walls,in which the corrugated steel plates were trapezoidal or sinusoidal corrugated.The results indicated that the ultimate resistance of all specimens was mainly attributed to their overall stability.The global buckling failure could be observed accompanied by local buckling of steel plates,while the welding seams between the corrugated plate and the steel tube remained undamaged.It was concluded that reducing the height-to-depth ratio of the wall could effectively improve its stability resistance.A refined finite element(FE)model was established,which well predicted the stability performance of MCCFSTWs under axial compression.A parametric study was conducted to investigate the effect of height-to-depth ratio,cross-sectional dimensions,concrete strength and corrugated plate shape on the stability performance of MCCFSTWs.The results show that the effect of steel plate thickness and width of CFST on the ultimate rosistance of MCCFSTWs decreases with the increase of height-to-thickness ratio,while the effect of corrugated cell width and concrete strength on the ultimate resistance of MCCFSTWs become important with large height-to-thickness ratio.Besides,the thickness and shape of corrugated plate have little effect on the ultimate resistance of MCCFSTWs.Finally,a design formula was proposed for practical design,and the ratios of numerical to formula results were basically within 1.00-1.10,which could safely estimated the test results.

关 键 词：多腔组合墙 波形钢板 轴压试验 稳定承载力 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1