| 地基不均匀沉降对框架结构影响的试验研究 |
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| 引用本文： | 贾强,程林林,张鑫. 地基不均匀沉降对框架结构影响的试验研究[J]. 土木工程学报, 2011, 0(11): 79-86 |
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| 作者姓名： | 贾强 程林林 张鑫 |
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| 作者单位： | 山东建筑大学;山东省建筑结构鉴定加固与改造重点实验室; |
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| 基金项目： | 住房和城乡建设部科技项目(2007-K6-13); 山东省科技攻关计划项目(2007GG20006005) |
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| 摘 要： | 地基不均匀沉降会引起框架结构产生附加内力,造成构件开裂甚至破坏。通过3跨框架结构的模型试验,研究框架结构在边柱沉降和中柱沉降两种工况下构件的开裂和破坏规律,提出地基不均匀沉降的限值。在边柱沉降的试验中,裂缝主要出现在边柱梁柱节点腋部、中柱梁柱节点顶部和中跨梁跨中顶部等部位,最终以边柱梁柱节点处裂缝贯通标志着构件的破坏。梁的转角正切达到1/250时,开始出现裂缝;梁的转角正切达到1/50时,构件达到承载力极限状态。中柱沉降的试验中,裂缝主要出现在边跨梁靠近边柱端上部、中跨梁跨中下部和中跨梁靠近节点端下部等,最终以中跨梁上部混凝土压酥标志着构件的破坏。梁的转角正切达到1/1250时,开始出现裂缝;梁的转角正切达到1/40时,构件达到承载力极限状态,试验结果与数值分析结果相吻合。
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| 关 键 词： | 框架结构 不均匀沉降 试验研究 附加内力 |
Experimental study of the influence of differential settlement on RC frame structures |
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| Jia Qiang Cheng Linlin Zhang Xin. Experimental study of the influence of differential settlement on RC frame structures[J]. China Civil Engineering Journal, 2011, 0(11): 79-86 |
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| Authors: | Jia Qiang Cheng Linlin Zhang Xin |
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| Affiliation: | Jia Qiang Cheng Linlin Zhang Xin(1.Shandong Jianzhu University,Jinan 250013,China,2.Shandong Provincial Key Lab of Appraisal and Retrofitting in Building Structures,China) |
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| Abstract: | Additional internal forces of RC frame structures may be induced by foundation differential settlement,which may result in failure of RC members.The crack and damage of RC members under lateral column settlement and middle column settlement were studied through a model experiment of a three-span frame structure.A limit value of foundation differential settlement was proposed.For lateral column settlement,the main cracks appeared at the underarm parts of beam-column joints,the top of beam-column joints of mi... |
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| Keywords: | RC frame structure differential settlement experimental study additional internal force |
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