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(1 浙江精工鋼結(jié)構(gòu)有限公司，紹興 312030； 2 同濟(jì)大學(xué)，上海 200092)

［摘要］某雙坡折板式網(wǎng)架結(jié)構(gòu)在地震作用下出現(xiàn)結(jié)構(gòu)撓度大幅度增加、部分橡膠支座錨栓被剪斷的破壞特征。通過(guò)對(duì)結(jié)構(gòu)現(xiàn)狀觀測(cè)、計(jì)算與分析，采取在網(wǎng)架結(jié)構(gòu)下部增加5道張弦式預(yù)應(yīng)力拉索、將原橡膠支座改為固定鉸支座、少量桿件與套筒原位加固的加固方案。加固后減小了結(jié)構(gòu)撓度，降低了構(gòu)件的應(yīng)力水平，增加了結(jié)構(gòu)豎向與水平剛度，在結(jié)構(gòu)中增加了一道二次防線，消除了結(jié)構(gòu)存在的安全隱患。

［關(guān)鍵詞］地震；張弦網(wǎng)架；拉索；橡膠支座；加固

中圖分類(lèi)號(hào)：TU356文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)06-0134-04

Discussion on reinforcement program of a grid structure

Liu Zhonghua¹, Wu Jie², Ye Xiang¹, Yu Qixiao¹(1 Zhejiang Jinggong Steel Building Co., Ltd., Shaoxing 312030, China；2 Tongji University，Shanghai 200092, China)

Abstract:The deflection of double-pitch hipped-plate grid structure increased significantly after earthquake, and the part of anchor bolts of rubber bearing were cut off. After observation and analysis of the actual state of the structure,  the reinforcement program was drawn up, which adding five pre-stressed string cable in the lower part of structure and changing rubber bearing to fixing hinge bearing and strengthening a small amount member and sleeve in situation. The reinforcement has reduced the deflection of the structure, lowered component stress levels and increased the vertical and horizontal stiffness of the structure. This mothod added a second line of defense in the structure and eliminated the security risks existed in the structure.

Keywords:earthquake; string grid structure; cable; rubber bearing; reinforcement

作者簡(jiǎn)介：劉中華，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：lzh4224@163.com。

參考文獻(xiàn)