本文關(guān)鍵詞： 高大模板支撐體系 兩階段設(shè)計(jì) 連續(xù)倒塌 目標(biāo)可靠指標(biāo) 極限承載力　出處：《工程力學(xué)》2017年S1期 　論文類型：期刊論文

【摘要】：提出了一種防連續(xù)倒塌高大模板支撐體系,由雙功能子體系和單一功能子體系組成,正常設(shè)計(jì)狀況下兩個(gè)子體系共同工作(簡(jiǎn)稱第一階段);偶然情況下單一功能子體系先失效,雙功能子體系獨(dú)自工作,避免整個(gè)結(jié)構(gòu)體系連續(xù)倒塌(簡(jiǎn)稱第二階段)。在兩個(gè)階段,考慮支撐體系在結(jié)構(gòu)布置、荷載和功能等方面的差異,研究和討論了兩階段設(shè)計(jì)目標(biāo)可靠指標(biāo)的合理取值。從承載能力和用鋼量的角度,給出合理的構(gòu)造措施和最優(yōu)的立桿型號(hào),不但保證正常設(shè)計(jì)狀況下結(jié)構(gòu)的安全性,而且在事故發(fā)生時(shí)給施工人員提供逃生機(jī)會(huì),為救援提供通道。
[Abstract]:A high formwork support system for continuous collapse prevention is proposed, which consists of a two-function sub-system and a single-functional sub-system. The two sub-systems work together under normal design conditions (referred to as the first stage). Occasionally, the single-function sub-system fails first, and the dual-function sub-system works alone to avoid the continuous collapse of the whole structural system (referred to as the second stage). In the two stages, the bracing system is considered in the structure arrangement. Based on the difference of load and function, the reasonable value of reliability index of two-stage design target is studied and discussed. From the point of view of bearing capacity and steel quantity, the reasonable construction measures and the optimal type of vertical rod are given. It not only guarantees the safety of the structure under the normal design condition, but also provides escape opportunities for the construction personnel and the rescue passage when the accident occurs.
【作者單位】： 北京交通大學(xué)土木建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51578050)
【分類號(hào)】：TU755.2
【正文快照】： 近年來(lái)高大模板支撐體系連續(xù)倒塌事故頻繁發(fā)生,倒塌發(fā)生后施工人員無(wú)處避險(xiǎn),倒塌部位下方無(wú)救援通道,造成群死群傷,且救援緩慢。盡管國(guó)外內(nèi)對(duì)高大模板支撐體系進(jìn)行過(guò)理論研究、現(xiàn)場(chǎng)調(diào)查和試驗(yàn)研究[1 5],我國(guó)頒布了具有更高安全度的新技術(shù)標(biāo)準(zhǔn)[6],但高大模板支撐體系倒塌事故

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