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(1 隴東學(xué)院土木工程學(xué)院， 慶陽 745000；   2 甘肅省高校黃土工程性質(zhì)及工程應(yīng)用省級重點(diǎn)實(shí)驗(yàn)室， 慶陽 745000；   3 蘭州交通大學(xué)甘肅省道路橋梁與地下工程重點(diǎn)實(shí)驗(yàn)室， 蘭州 730070；  4 蘭州交通大學(xué)道橋工程災(zāi)害防治技術(shù)國家地方聯(lián)合工程實(shí)驗(yàn)室， 蘭州 730070）

［摘要］為了研究溫變對大直徑圓鋼管混凝土構(gòu)件截面溫度場分布的影響，分別在室外環(huán)境和人工氣候模擬試驗(yàn)箱內(nèi)進(jìn)行了溫變試驗(yàn)，測得不同溫變條件下鋼管混凝土試件和素混凝土對照試件的溫度場。試驗(yàn)結(jié)果表明：鋼管混凝土試件和素混凝土對照試件溫度場變化規(guī)律基本一致，無日照作用時(shí)截面溫度場呈均勻分布，日照作用下截面溫度場呈非均勻分布。兩種環(huán)境下，試件截面溫度場均呈現(xiàn)出從外往內(nèi)越靠近圓心, 溫度變化越滯后的現(xiàn)象，而且試件截面最大溫差主要取決于太陽輻射和氣溫變化幅度。

［關(guān)鍵詞］鋼管混凝土；   溫度場；   溫變試驗(yàn)；   試驗(yàn)研究；   日照作用

中圖分類號(hào)：TU528-79文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)17-0099-05

Experimental research on the temperature field distribution of large diameter circular CFST section

YANG Yang1,2, ZHANG Rongling3,4, QI Qiang3, YANG Hongping1,2

(1 School of Civil Engineering, Longdong University, Qingyang 745000, China; 2 Provincial Key Laboratory of Loess Engineering Properties and Application in Gansu Province Universities, Qingyang 745000, China; 3 Key Laboratory of Road ＆ Bridges and Underground Engineering of Gansu Province， Lanzhou Jiaotong University， Lanzhou 730070， China; 4 National and Provincial Joint Engineering Laboratory of Road ＆ Bridge Disaster Prevention and Control， Lanzhou Jiaotong University， Lanzhou 730070，  China)

Abstract:In order to study the influence of temperature change on the temperature field distribution of large diameter circular concrete filled steel tube (CFST) section, the temperature change test was carried out under the outdoor environment and artificial climate simulated test box, the temperature field of the CFST specimen and the plain concrete control specimen under different temperature change conditions were measured. The test results show that: the change law of the temperature field of the CFST specimen and the plain concrete control specimen is basically the same. The temperature field of the cross section is uniformly distributed without the action of sunshine and the temperature field of the cross section is nonuniform under the sunlight. In both environments, the temperature field of the cross section of the specimen shows a phenomenon that the closer to the center of the circle from the outside to the inside, the more lagging the temperature change is. The maximum temperature difference of the specimen cross section mainly depends on the solar radiation and the range of temperature change.

Keywords:concrete filled steel tube；  temperature field；  temperature change test；  experimental research；  action of sunshine

*甘肅省教育廳高等學(xué)?？蒲许?xiàng)目(2018B-054)，教育部高教司產(chǎn)學(xué)合作協(xié)同育人項(xiàng)目（201901273045），甘肅省教育科學(xué)“十三五”規(guī)劃2019年課題(GS〔2019〕GHB2065)，隴東學(xué)院教育教學(xué)研究項(xiàng)目（2019-37）。

作者簡介：楊陽，碩士，講師，Email：1027406080@qq.com。