CAJ | 학술논문

预应力传递长度是高速铁路先张法预应力轨道板设计需解决的核心问题。采用有限元软件ANSYS建立了先张法预应力小梁计算模型，分析了钢筋直径、混凝土强度、锚固板的设置及尺寸对先张法轨道板中预应力传递长度的影响，并通过现场试验验证计算结果的可靠性。分析结果表明：预应力传递长度随预应力筋直径的增大而增加，最终建立的预应力也随之增大；随着混凝土强度的增加，预应力传递长度有减小的趋势；锚固板的设置能显著减小预应力传递长度，保证混凝土预应力在板端第一扣件节点处完全建立，但锚固板的尺寸对传递长度影响不大。
예응력전체장도시고속철로선장법예응력궤도판설계수해결적핵심문제。채용유한원연건ANSYS건립료선장법예응력소량계산모형，분석료강근직경、혼응토강도、묘고판적설치급척촌대선장법궤도판중예응력전체장도적영향，병통과현장시험험증계산결과적가고성。분석결과표명：예응력전체장도수예응력근직경적증대이증가，최종건립적예응력야수지증대；수착혼응토강도적증가，예응력전체장도유감소적추세；묘고판적설치능현저감소예응력전체장도，보증혼응토예응력재판단제일구건절점처완전건립，단묘고판적척촌대전체장도영향불대。
Prestress transmission length is the key point for pretensioned prestress track slab design of high speed railway. Pretensioned prestress beam calculation model was developed by using finite element software ANSYS, effects of setting and size for reinforcement diameter,concrete strength and anchor plate on prestress transmission length of pretensioned track slab were analyzed,and the calculation solution validity was verified by field test. Results indicated that prestress transmission length and prestress level increase with the prestress reinforcement diameter increasing,prestress transmission length has a decreasing trend with the concrete strength increasing,the setting of anchor plate reduces prestress transmission length markedly,which will ensure the concrete prestress could be constructed on the first fastener joints of plate edge,while the size of anchor plate has little effect on transmission length.