發(fā)布時間：2018-06-28 11:34

  本文選題：自應力 + 自密實��； 參考：《工程力學》2017年07期

【摘要】：為提高鋼管內(nèi)混凝土的密實度,減小混凝土的收縮,以保證鋼管與混凝土更好地共同工作,滿足實際工程需要,該文提出采用鋼管自應力自密實高強混凝土柱,考慮偏心距、長徑比和初始自應力等參數(shù)的影響,設計制作21根鋼管自應力自密實高強混凝土柱和3根鋼管自密實高強混凝土柱試件,通過偏心受壓試驗,考察試件的破壞形態(tài),實測試件的荷載-撓度曲線和荷載-應變曲線,分析各參數(shù)對偏心受壓試件受力性能的影響。研究表明:偏心受壓試件主要發(fā)生彎曲失穩(wěn)破壞;試件極限承載力隨偏心距或長徑比增大而減小,當初始自應力為3 MPa~5 MPa時,鋼管自應力自密實混凝土偏心受壓柱的極限承載力提高9.2%~11.7%。參考國內(nèi)相關規(guī)范,通過試驗數(shù)據(jù)回歸分析,提出鋼管自應力自密實高強混凝土柱偏心受壓承載力計算公式,可供工程設計參考。
[Abstract]:In order to improve the compactness of concrete in steel tube and reduce the shrinkage of concrete, so as to ensure that the steel tube and concrete can work together better and meet the practical engineering needs, this paper puts forward a self-stress self-compacting high-strength concrete column with eccentricity in mind. In this paper, 21 steel tube self-compacting high-strength concrete columns and three steel tube self-compacting high-strength concrete columns are designed and fabricated under the influence of the ratio of length to diameter and initial self-stress. The failure patterns of the specimens are investigated by eccentric compression test. The load-deflection curves and load-strain curves of the specimens were measured and the effects of various parameters on the mechanical properties of eccentric compression specimens were analyzed. The results show that the bending failure occurs mainly in eccentric compression specimens, and the ultimate bearing capacity decreases with the increase of eccentricity or aspect ratio. When the initial self stress is 3 MPA, the ultimate bearing capacity of the specimens decreases with the increase of the eccentric distance or the ratio of length to diameter. The ultimate bearing capacity of self-stress self-compacting concrete eccentrically compressed columns is increased by 9. 2 and 11. 7. With reference to relevant domestic codes and regression analysis of test data, a formula for calculating the eccentric compressive capacity of steel tube self-compacting high-strength concrete columns is put forward, which can be used as a reference for engineering design.
【作者單位】： 武漢大學土木建筑工程學院;
【基金】：國家自然科學基金項目(51478367)
【分類號】：TU398.9

【相似文獻】

相關期刊論文 前10條

1 高學善;;自應力混凝土的發(fā)展和應用[J];冶金建筑;1980年08期

2 李世龍;;能源消耗與自應力混凝土管[J];混凝土與水泥制品;1981年01期

3 李生慶;鐵大武;;對硅酸鹽自應力混凝土及其壓力管一些技術(shù)問題的探討[J];沈陽建筑工程學院學報;1987年Z1期

4 李世龍;;制管用自應力混凝土的配合比設計[J];混凝土與水泥制品;1992年05期

5 楊瑞珊;;自應力混凝土管的現(xiàn)狀和展望[J];混凝土與水泥制品;1993年05期

6 阮起楠,于緣寶;自應力管(300～600mm)轉(zhuǎn)為一階段生產(chǎn)的一次成功的嘗試[J];混凝土與水泥制品;1999年05期

7 姜峰,黃承逵,戴建國;自應力混凝土結(jié)構(gòu)限制膨脹過程有限元法分析[J];大連理工大學學報;2001年05期

8 ;自應力混凝土，

本文編號：2077860