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（中國鐵建投資集團(tuán)有限公司， 北京 100855 ）
［摘要］為了確定橋梁結(jié)構(gòu)在靜載作用下的受力狀態(tài)和工作狀態(tài)，評定橋梁能否正常使用，詳細(xì)闡述了跨西干渠中橋20m超低高度預(yù)應(yīng)力混凝土梁的靜載試驗(yàn)全過程。通過試驗(yàn)得出橋梁的跨中撓度和跨中截面應(yīng)變的試驗(yàn)值與《鐵路橋梁檢定規(guī)范》中規(guī)定限值的差距，為橋梁加固、橋梁限速等提供依據(jù)。
［關(guān)鍵詞］靜載試驗(yàn)； 撓度； 截面應(yīng)變
中圖分類號： TU391 文獻(xiàn)標(biāo)識碼： A文章編號： 1002-848X(2016)S1-0687-04
Static load test of very shallow prestressed concrete beam with 20m span
Xu Huaiwei
(China Railway Construction Investment Group Corporation Limited, Beijing 100855, China)
Abstract: In order to determine the stress state of the bridge, the working conditions under static loads and assess whether the bridge is still under the state of serviceability. The whole process of a 20m very shallow prestressed concrete beam named Xiganqu midde bridge under static load test was elaborated. The deflection of the bridge and strain of the mid-span section were obtained by test and compared with the values of Test Specification of Railway Bridge, which provides a basis for bridge reinforcing and speed limit of train.
Keywords: static load test； deflection； section strain
作者簡介： 徐懷衛(wèi)，碩士，工程師，Email：106326752@qq.com。
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