摘要
基于两榀大尺度后张有粘结预应力全型钢混凝土框架的静力试验,对预应力型钢混凝土框架梁的抗裂度进行了测试和理论研究。应用混凝土基本原理、GB 50010—2002《混凝土结构设计规范》和ACI318—05规范中抗裂度公式推导了考虑次轴力的预应力型钢混凝土框架的抗裂度计算公式,用试验值进行验证。结果表明:按照混凝土基本原理推导的公式计算值与试验结果相比误差较小,一般在6%以内;GB50010—2002推导的开裂弯矩计算值相比试验值误差在10%左右,能够满足工程需要,且计算简单;按ACI318—05计算的开裂弯矩小于试验值,工程应用时偏于不安全。
Based on the static test of large-scaled prestressed steel concrete frames,the crack resistance of such frame beams was tested and investigated.In this paper,according to theory of reinforced concrete members and the formulas of crack resistance in Code for Design of Concrete Structures（GB 50010—2002）and code ACI 318—05,the formulas of cracking moment considering secondary axial forces were deduced and verified by test results.Conclusion can be drawn as follows： the calculation error of formulas derived from theory of reinforced concrete members is small,generally less than 6%;the error of formulas derived from GB 50010—2002 is about 10%,which can meet the needs of engineering and simply to be calculated;cracking moment calculated by formulas derived from code ACI 318—05 is less than test result,it is unsafe for engineering application.
出处
《工业建筑》
CSCD
北大核心
2011年第12期16-19,共4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)
关键词
预应力型钢混凝土框架
静力试验
抗裂度
次轴力
prestressed steel reinforced concrete frames
static test
crack resistance
secondary axial force
