In the framework of the finite deformation theory, the plastic collapse analysis of thin-walled pipes subjected to the internal pressure is conducted on the basis of the unified strength criterion （USC）. An analytic...In the framework of the finite deformation theory, the plastic collapse analysis of thin-walled pipes subjected to the internal pressure is conducted on the basis of the unified strength criterion （USC）. An analytical solution of the burst pressure for pipes with capped ends is derived, which includes the strength differential effect and takes the influence of strength criterion on the burst pressure into account. In addition, a USC- based analytical solution of the burst pressure for end-opened pipes under the internal pressure is obtained. By discussion, it is found that for the end-capped pipes, the influence of different yield criteria and the strength differential effect on the burst pressure are significant, while for the end-opened pipes, the burst pressure is independent of the specific form of the strength criterion and strength difference in tension and compression.展开更多
综述了原位固化(Cured In Place Pipe,CIPP)法、穿插法、内衬法、无机防腐砂浆喷涂法、套环法、注浆法和Pipere-100内涨圈柔性内修复法共7种国内常用大口径管涵非开挖修复技术,以及Rib Loc螺旋缠绕技术和Pattem Flooring技术等国外常用...综述了原位固化(Cured In Place Pipe,CIPP)法、穿插法、内衬法、无机防腐砂浆喷涂法、套环法、注浆法和Pipere-100内涨圈柔性内修复法共7种国内常用大口径管涵非开挖修复技术,以及Rib Loc螺旋缠绕技术和Pattem Flooring技术等国外常用大口径管涵非开挖修复技术,并结合文献和作者的研究成果,提出用于水上部分修复的快速修复砂浆和用于水下部分修复的水下抗分散修复砂浆。展开更多
基金Project supported by the National Natural Science Foundation of China (Nos. 51079128 and11172265)the Natural Science Foundation of Zhejiang Province of China (No. Y1101107)
文摘In the framework of the finite deformation theory, the plastic collapse analysis of thin-walled pipes subjected to the internal pressure is conducted on the basis of the unified strength criterion （USC）. An analytical solution of the burst pressure for pipes with capped ends is derived, which includes the strength differential effect and takes the influence of strength criterion on the burst pressure into account. In addition, a USC- based analytical solution of the burst pressure for end-opened pipes under the internal pressure is obtained. By discussion, it is found that for the end-capped pipes, the influence of different yield criteria and the strength differential effect on the burst pressure are significant, while for the end-opened pipes, the burst pressure is independent of the specific form of the strength criterion and strength difference in tension and compression.
文摘综述了原位固化(Cured In Place Pipe,CIPP)法、穿插法、内衬法、无机防腐砂浆喷涂法、套环法、注浆法和Pipere-100内涨圈柔性内修复法共7种国内常用大口径管涵非开挖修复技术,以及Rib Loc螺旋缠绕技术和Pattem Flooring技术等国外常用大口径管涵非开挖修复技术,并结合文献和作者的研究成果,提出用于水上部分修复的快速修复砂浆和用于水下部分修复的水下抗分散修复砂浆。
文摘为评价埋地玻璃钢夹砂管涵洞的安全性,保障道路交通运输安全,本文以理论计算为基础,进行现场试验检测,综合分析地面车辆荷载和竖向土压力传至公路下的埋地玻璃钢纤维夹砂管上的作用力与管涵的受力变形特性,然后用回归预测模型计算1200 k N荷载下的力学参数值,验证管涵安全运营状况。结果表明,理论计算和现场试验进行比对,验证了车辆荷载作用下直径1.5 m、厚38 mm的玻璃钢夹砂管的安全可靠性,为玻璃钢夹砂管设计和施工提供科学理论依据。
