钢板-CRRPC-TPO复合梁弯拉受力非线性分析

发布时间：2018-01-13 10:04

本文关键词：钢板-CRRPC-TPO复合梁弯拉受力非线性分析　出处：《中南大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：为解决大跨径钢桥面铺装面临的疲劳开裂和铺装易损等难题,提出钢桥面CRRPC-TPO超高性能轻型组合桥面铺装体系。考虑TPO,RPC及钢材的非线性本构关系,对新结构复合梁进行弯拉非线性仿真模拟,得到复合梁的初裂点、钢材屈服点以及复合梁破坏点的荷载和结构变形。研究结果表明:荷载-挠度曲线理论计算能够较好地反映钢板-CRRPC-TPO新型组合结构体系的受力特点及变形性能,特征点荷载误差为3.2%~3.9%,挠度误差为5.7%~8.7%;复合梁数值计算的初裂荷载及极限荷载均比试验结果略小,运用本文编制的数值计算程序进行工程设计偏于安全。
[Abstract]:In order to solve the problems of fatigue cracking and pavement vulnerability faced by long-span steel deck pavement, a lightweight composite deck pavement system with ultra-high performance of steel deck CRRPC-TPO was proposed. TPO was considered. The nonlinear constitutive relation of RPC and steel is used to simulate the flexural tension of the new composite beam, and the initial crack point of the composite beam is obtained. Load and structural deformation of steel yield point and failure point of composite beam. The results show that:. The theoretical calculation of load-deflection curve can well reflect the mechanical characteristics and deformation performance of a new composite structure system of steel plate CRRPC-TPO. The characteristic point load error is 3.2and 3.9.The deflection error is 5.7 and 8.7; The initial crack load and limit load of the composite beam are slightly smaller than that of the test results. It is safe to design the composite beam by using the numerical calculation program developed in this paper.
【作者单位】：湖南大学土木工程学院;湖南大学风工程与桥梁工程湖南省重点实验室;深圳市星河更新投资有限公司;
【基金】：国家自然科学基金资助项目(51678229) 浙江省交通运输厅项目(2015J24)~~
【分类号】：U441
【正文快照】： 钢桥面铺装通常采用柔性铺装或刚性铺装,其中柔性铺装因其具有自身重力小(厚度为5.5~8.0 cm)、与钢板的追随性好、行车舒适等优点而被广泛应用。然而,柔性铺装材料如环氧沥青混凝土、浇筑式沥青混凝土、SMA等由于材料自身模量低,不能有效提高桥面刚度,导致重载作用下局部变形

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