CAJ | 학술논문

运营中的连续梁桥、连续钢构桥预应力损失过大，导致桥梁过早破坏。基于弹性接触理论，指出弯曲孔道摩阻损失中接触应力应为中间大、两边小分布，与现行设计中接触应力分布规律不符。为了探讨弯曲孔道预应力摩阻损失中接触应力分布的真实规律，运用CT扫描技术对接触应力试验模型进行试验，得出接触面上实际应力的总体分布趋势。结果表明，预应力弯曲孔道摩阻损失设计计算中接触应力分布规律与实际分布规律不相符，造成现行弯曲孔道预应力摩阻损失设计值与实际损失值有一定偏差。
운영중적련속량교、련속강구교예응력손실과대，도치교량과조파배。기우탄성접촉이론，지출만곡공도마조손실중접촉응력응위중간대、량변소분포，여현행설계중접촉응력분포규률불부。위료탐토만곡공도예응력마조손실중접촉응력분포적진실규률，운용CT소묘기술대접촉응력시험모형진행시험，득출접촉면상실제응력적총체분포추세。결과표명，예응력만곡공도마조손실설계계산중접촉응력분포규률여실제분포규률불상부，조성현행만곡공도예응력마조손실설계치여실제손실치유일정편차。
Excessive Prestressed loss in Prestressed concrete continuous beam bridge and continuous rigid frame bridge cause structures to be different types of diseases .Based on elastic contact theory , the theoretical distribution of contact stress in curving hole should be different to the prevailing distri‐bution applied to design .In order to explore the real distribution of contact stress ,using the CT scan‐ning technique to test a model and to obtain the overall trend of actual distribution of contact surface stress .The test results show that the actual contact surface stress in curving hole is inconsistent with the design and create a certain deviation in the current curving hole friction loss design .