| 焊接工字形钢支撑等幅轴向反复循环荷载下低周疲劳性能试验 |
| |
| 引用本文： | 张耀春,于海丰,张文元,连尉安.焊接工字形钢支撑等幅轴向反复循环荷载下低周疲劳性能试验[J].东南大学学报(自然科学版),2009,39(3). |
| |
| 作者姓名： | 张耀春 于海丰 张文元 连尉安 |
| |
| 作者单位： | 1. 哈尔滨工业大学土木工程学院,哈尔滨,150090
2. 上海建筑设计研究院有限公司,上海,200041 |
| |
| 基金项目： | 国家自然科学基金重大项目，国家科技支撑计划 |
| |
| 摘 要： | 在两端铰接ST12材质焊接工字形钢支撑等幅轴向反复循环荷载低周疲劳性能试验基础上,进行了Q235材质焊接工字形钢支撑低周疲劳性能试验.分析了2种材质的共47根支撑在试验载荷下的最大横向变形和最大抗压承载力特性,验证了文献及规范方法的可靠性.在假设加载幅值、试件几何特征以及钢材屈服强度对支撑低周疲劳寿命影响相互独立的基础上,提出了估算支撑低周疲劳寿命的经验公式.分析表明,翼缘宽厚比越小,长细比越大,加载幅值越小,屈服强度越低,支撑低周疲劳寿命越高.由于在地震作用时支撑构件位移时程不可预知,设计支撑时除应严格限制翼缘板件宽厚比外,还应适当采用低屈服点钢材及适当放宽某些现行规程对长细比的限制,以避免支撑过早断裂.最后,根据支撑不同损伤阶段的累积耗能比,指出可偏于安全的采用阶段I的寿命估算公式来预估支撑的低周疲劳寿命.
|
| 关 键 词： | 焊接工字钢支撑 低周疲劳性能 循环荷载 |
Experimental study on low-cycle fatigue behavior of welded I-section steel bracing members under constant amplitude reversed cyclic axial loading |
| |
| Zhang Yaochun,Yu Haifeng,Zhang Wenyuan,Lian Wei'an.Experimental study on low-cycle fatigue behavior of welded I-section steel bracing members under constant amplitude reversed cyclic axial loading[J].Journal of Southeast University(Natural Science Edition),2009,39(3). |
| |
| Authors: | Zhang Yaochun Yu Haifeng Zhang Wenyuan Lian Wei'an |
| |
| Institution: | Zhang Yaochun1 Yu Haifeng1 Zhang Wenyuan1 Lian Wei'an2(1School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China) (2Shanghai Institute of Architectural Design , Research Co.Ltd.,Shanghai 200041,China) |
| |
| Abstract: | Based on the low-cycle fatigue behavior tests of welded I-section ST12 steel bracing members with pinned connections under constant amplitude reversed cyclic axial loading,the low-cycle fatigue behavior of welded I-section Q235 steel bracing members with pinned connections was examined.The test results about the maximum lateral deformation and the maximum compressive strength of 47 bracing members made of Q235 and ST12 were studied and verified in comparison with the results calculated by the relevant liter... |
| |
| Keywords: | welded I-section steel bracing member low-cycle fatigue behavior cyclic loading |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
