预应力型钢混凝土框架梁裂缝控制试验分析及计算  

EXPERIMENT AND CALCULATION OF CRACK CONTROL ON PRESTRESSED STEEL REINFORCED CONCRETE FRAME BEAMS

作　　者：熊学玉[1,2] 高峰[1] 李亚明[3] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学先进土木工程材料教育部重点实验室,上海200092 [3]上海建筑设计研究院有限公司,上海200041

出　　处：《工业建筑》2011年第12期20-23,7,共5页Industrial Construction

基　　金：国家工程建设行业标准<预应力混凝土结构设计规范>研究项目;上海市科委科技支撑计划(09231201102);国家自然科学基金(E080501);教育部高等学校博士学科点专项科研基金(20090072110051);铁道部重点课题(2010G009-K);科技部创新项目(10C26213100691)

摘　　要：裂缝宽度控制的目的是保证结构的正常使用功能和结构耐久性能。在两榀预应力型钢混凝土框架竖向静力试验的基础上,对预应力型钢框架裂缝发生、开展和分布进行了详细的观测与分析。考虑次弯矩、次轴力的影响,基于现行混凝土规范的裂缝宽度计算原理,提出了全面考虑次内力的预应力型钢混凝土结构最大裂缝宽度计算公式,建议的计算公式概念明确,计算值与试验结果吻合较好,可作为在编国家行业标准《预应力混凝土结构设计规范》的参考。The objective of crack width control is to ensure the normal function and durability of a structure.Based on the vertical static test of two prestressed steel reinforced concrete frames,the crack occurrence,development and distribution of prestressed steel reinforced concrete frames were observed and analyzed.The prestressed steel reinforced concrete structure calculation formula of the maximum crack width is put forward,which consideres the impact of the second moment and second axial force and bases on the calculation principle of crack width in current code for design of concrete structure.The concept of formula is clear and the calculated values agree well with the test results.The formula proposed has a certain value of reference for the compilation of Prestressed Concrete Design Code.

关 键 词：预应力型钢混凝土结构 裂缝宽度 次弯矩 次轴力 

分 类 号：TU398.9[建筑科学—结构工程]