CAJ | 학술논문

实测硬化中水泥混凝土路面板内的温度分布，确定混凝土的终凝时间，提出固化温差及有效温差的计算方法，并计算两种施工环境条件下路面板的固化温差和有效温差，进行固化温差对板的翘曲和应力影响分析计算。研究结果表明：春季和秋季施工在水泥混凝土路面板中产生负的固化温差，将会导致路面板在1d中的大部分时间处于板中脱空的状态，在板中临界荷位处板底产生拉应力，而采用小尺寸板，相比较大尺寸板更能降低路面板翘曲及耦合应力，降低疲劳破坏。
실측경화중수니혼응토로면판내적온도분포，학정혼응토적종응시간，제출고화온차급유효온차적계산방법，병계산량충시공배경조건하로면판적고화온차화유효온차，진행고화온차대판적교곡화응력영향분석계산。연구결과표명：춘계화추계시공재수니혼응토로면판중산생부적고화온차，장회도치로면판재1d중적대부분시간처우판중탈공적상태，재판중림계하위처판저산생랍응력，이채용소척촌판，상비교대척촌판경능강저로면판교곡급우합응력，강저피로파배。
The temperature distributions were measured in hardening concrete slabs ,determining final set time of concrete ;the calculation methods of built‐in temperature difference and the effective temperature difference were provided to determine the corresponding values of the slabs constructed during spring and fall ,respectively .Finally ,the influence of built‐in temperature difference on slab curling and stress were evaluated based on finite element analysis .T he results show that negative built‐in temperature differences were found in both spring and fall construction which will lead to loss of slab support in the mid‐slab position during the most time of a day ,and larger tensile stress generates at the slab bottom .However , small size slab will minimize this negative effect from built‐in temperature difference and at the same time reduce fatigue damage .