- 摘 要
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（1 中國電力科學(xué)研究院， 北京 100192； 2 濰坊學(xué)院建筑工程學(xué)院， 濰坊 261061）
［摘要］主材為雙拼角鋼輸電塔的主材承載力計算方法尚未成熟，給該類型輸電塔的推廣應(yīng)用造成了很大困難。為此，設(shè)計了主材規(guī)格為2L110×10、屈服強度設(shè)計值為345MPa的雙拼角鋼塔架，利用液壓缸帶動加載繩完成了該輸電塔的靜載破壞性試驗，并記錄了加載過程中塔架主材各橫截面應(yīng)變的變化。然后，根據(jù)主材的應(yīng)變得到了該輸電塔在破壞時的彎矩和軸力，并和現(xiàn)有設(shè)計準(zhǔn)則進(jìn)行了對比。結(jié)果表明，當(dāng)雙拼角鋼主材繞實軸的長細(xì)比大于該主材按綴板柱計算得到繞虛軸長細(xì)比時，按壓彎構(gòu)件計算得到驗算應(yīng)力與主材的實測屈服強度最為接近。
［關(guān)鍵詞］雙拼角鋼； 主材； 輸電塔架； 靜載
中圖分類號：TU392文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)14-0042-04
Static loading experimental research on transmission tower frame adopting double-spicing angle steel as main material
Liu Haifeng1， Han Junke1， Wang Fei1， Xing Dong2， Su Zhigang1
（1 China Electric Power Research Institute, Beijing 100192, China; 2 Architectural Engineering Institute of Weifang University, Weifang 261061, China）
Abstract:The calculation method of bearing capacity of main material for transmission tower with double-spicing angle steel as main material is not yet mature, which causes great difficulties for the popularization and application of this type of transmission tower. To this end, double-spicing angle steel tower frame was designed with main material of the specifications of 2L110×10 and the yield strength design value of 345MPa. Hydraulic cylinder was used to drive the loading rope to complete the tower′s static destruction test, and the changes of the cross sectional strains in the process of loading on transmission tower were recorded. Then according to the main material′s strain, the bending moment and axial force of the transmission tower for the destruction state were obtained and were compared with existing design codes. Results show that, when the slenderness ratio of the main material of double-spicing angle steel around the real axis is greater than the slenderness ratio around the imaginary axis calculated according to battened column as the main material, the checking stress calculated based on compression bending member is closest to the measured yield strength of the main material.
Keywords:double-spicing angle steel; main material; transmission tower frame; static loading
*國家自然科學(xué)基金項目（51408569）。
作者簡介：劉海鋒，博士，高級工程師，Email：oceanlhf@163.com。
