西安鐘樓臺(tái)基防工業(yè)振動(dòng)控制標(biāo)準(zhǔn)研究*
錢春宇1，鄭建國1，張煒1，章榮軍2
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（1機(jī)械工業(yè)勘察設(shè)計(jì)研究院有限公司， 西安 710043； 2 華中科技大學(xué)土木工程與力學(xué)學(xué)院， 武漢 430074）
［摘要］隨著社會(huì)經(jīng)濟(jì)高速發(fā)展，西安鐘樓附近的工程活動(dòng)和人為擾動(dòng)日益頻繁，鐘樓結(jié)構(gòu)長期安全性能受到了嚴(yán)峻的挑戰(zhàn)。因此有必要建立合理科學(xué)的振動(dòng)控制標(biāo)準(zhǔn)，以約束鐘樓附近的工程活動(dòng)和人為擾動(dòng)。首先采用三維數(shù)值仿真方法分析工業(yè)振動(dòng)條件下鐘樓結(jié)構(gòu)的力學(xué)響應(yīng)，然后基于既有文獻(xiàn)和疲勞試驗(yàn)結(jié)果，確定鐘樓臺(tái)基砌體的疲勞損傷模型和疲勞曲線，最后通過理論方法評(píng)估不同工況下西安鐘樓臺(tái)基的疲勞壽命，給出臺(tái)基防疲勞破壞的振動(dòng)控制標(biāo)準(zhǔn)。結(jié)果表明，對(duì)于西安鐘樓臺(tái)基，工業(yè)振動(dòng)引起的地面振動(dòng)速度宜控制在0.8mm/s以內(nèi)。［關(guān)鍵詞］古建筑; 鐘樓結(jié)構(gòu); 工業(yè)振動(dòng); 疲勞破壞; 動(dòng)力響應(yīng); 控制標(biāo)準(zhǔn)中圖分類號(hào)：TU435，TU470 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)19-0026-06
Study on industrial vibration control standard for platform of Xi′an Bell TowerQian Chunyu1, Zheng Jianguo1, Zhang Wei1, Zhang Rongjun2（1 China JIKAN Research Institute of Engineering Investigations and Design Co., Ltd., Xi′an 710043, China; 2 School of Civil Engineering & Mechanics，Huazhong University of Science and Technology, Wuhan 430074, China)Abstract: With the high-speed development of society economy, there are increasingly engineering activities and man-made disturbances nearby Xi′an Bell Tower, and these engineering activities and man-made disturbances threaten the long-term safety of the bell tower structure. Hence, it is necessary to formulate the vibration control standard to restrain the nearby engineering activities and man-made disturbances. Firstly, the dynamic response of the bell tower structure under industrial vibration was investigated by using three-dimensional numerical simulation method. Then the fatigue damage accumulation model and the S-N curve for the masonry platform were determined based on the existing literature and fatigue experiments data. Finally, the fatigue life of the masonry platform was evaluated under different working conditions and the anti-fatigue failure vibration control standard was proposed. Results indicate that the peak velocity of the ground vibration induced by industrial activities for platform of Xi′an Bell Tower should be controlled under 0.8mm/s.Keywords:ancient building; bell tower structure; industrial vibration; fatigue failure; dynamic response; control standard
*國機(jī)集團(tuán)科技發(fā)展基金資助項(xiàng)目（集團(tuán)13科192號(hào)）。作者簡介：錢春宇，碩士，教授級(jí)高級(jí)工程師，Email：qiancy@jk.com.cn。
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