交通振源對(duì)磚混結(jié)構(gòu)住宅影響的減振方法研究*
朱斌1, 2，陳龍珠1
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(1 上海交通大學(xué)土木工程系安全與防災(zāi)工程研究所, 上海 200240；2 上海市建筑科學(xué)研究院上海市工程結(jié)構(gòu)新技術(shù)重點(diǎn)實(shí)驗(yàn)室, 上海 200032)
［摘要］磚混結(jié)構(gòu)住宅因基礎(chǔ)淺，容易受到周邊交通振源影響，且沿房屋高度有振動(dòng)放大效應(yīng)，對(duì)居民生活產(chǎn)生干擾。而減小房屋水平橫向振動(dòng)是當(dāng)前的難點(diǎn)之一。實(shí)地測(cè)試并總結(jié)6棟房屋的振動(dòng)放大規(guī)律，與《建筑工程容許振動(dòng)標(biāo)準(zhǔn)》（GB 50868—2013）中有關(guān)住宅舒適性振級(jí)限值進(jìn)行比較，進(jìn)而針對(duì)其中1棟房屋進(jìn)行分析，并提出相應(yīng)的減振目標(biāo)。進(jìn)一步研究了房屋下設(shè)虛擬層的結(jié)構(gòu)動(dòng)力特性，發(fā)現(xiàn)其有限元模型的振動(dòng)響應(yīng)更符合實(shí)際情況。通過(guò)數(shù)值計(jì)算比較加固上部結(jié)構(gòu)橫墻前后的減振效果，為解決類似的振動(dòng)問(wèn)題提供有效途徑。［關(guān)鍵詞］磚混結(jié)構(gòu); 環(huán)境振動(dòng); 放大效應(yīng); 減振方法中圖分類號(hào)：TU311.3 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)19-0037-04
Vibration reduction method study of influence of transportation vibration sources on masonry concrete structure residenceZhu Bin1, 2, Chen Longzhu1（1 Institute of Engineering Safety and Disaster Prevention, Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2 Shanghai Research Institute of Building Sciences, Shanghai Key Laboratory of New Technology Research on Engineering Structure, Shanghai 200032, China）Abstract: Due to shallow foundation, masonry concrete structure residence is vulnerable to surrounding transportation vibration sources. And vibration amplification effect of the building along the height interferes the residents' living. The horizontal lateral vibration reduction is one of the current difficulties. The vibration amplification laws of six buildings were measured in field and summarized, and the results were compared with the residence comfort vibration level limit in Standard for allowable vibration of building engineering (GB 50868—2013). Then one residence was analyzed, and the corresponding vibration reduction target was proposed. The structural dynamic characteristics of the virtual layer set under the building were further researched. The results show that the vibration response of the finite element model is accorded with the actual situation to a greater extent. By numerical calculation, the vibration reduction effects of the building before and after the strengthening of cross walls in upper structure were compared, and the effective way was provided to solve the similar vibration problem.Keywords: masonry concrete structure; environmental vibration; amplification effect; vibration reduction method
* 國(guó)家科技支撐計(jì)劃 (2012BAJ07B04)，上海市科委資助項(xiàng)目（11dz1202000）。作者簡(jiǎn)介：朱斌，博士研究生， 高級(jí)工程師，Email: 1931697937@qq.com。
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