文献类型：期刊文献

英文题名：A study on the optimal use of soundless cracking demolition agents in fragmentations of concrete based on the extended finite element method

作者：Zhong, Zhen[1,2];Zhang, Hao[1];Yang, Xihua[1];Lou, Rong[3];Liu, Bin[4,5];Chi, Yunfei[6];Chen, Yifan[6]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing, Peoples R China;[2]Shaoxing Univ, Ctr Rock Mech & Geohazards, Shaoxing, Peoples R China;[3]Huahui Engn Design Grp Corp Ltd, Shaoxing, Peoples R China;[4]Hunan Agr Univ, Coll Water Resources & Civil Engn, Changsha, Peoples R China;[5]Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore, Singapore;[6]Zhejiang Inst Hydraul & Estuary, Hangzhou, Peoples R China

年份：0

外文期刊名：STRUCTURAL CONCRETE

收录：SCI-EXPANDED(收录号：WOS:000782681800001)、、EI(收录号：20221611973869)、Scopus(收录号：2-s2.0-85128192189)、WOS

基金：China Scholarship Council, Grant/Award Number: 202006370108; International Scientific and Technological Cooperation Projects of Shaoxing University, Grant/Award Number: 2019LGGH1008; National Natural Science Foundation of China, Grant/Award Number: 51509154; Natural Science Foundation of Zhejiang Province, Grant/Award Number: LGJ20E090001

语种：英文

外文关键词：concrete; extended finite element method; maximum expansive pressure; optimal hole diameter; soundless cracking technique

外文摘要：Soundless cracking technique has been widely applied in the demolition of rock and concrete structures because of its cleaner advantages compared with conventional explosive methods. However, the correlations between fracturing processes and characteristics of soundless cracking demolition agents (SCDAs) and the optimal use of SCDA in improving the efficiency of demolition are still poorly documented. In this concern, this study develops a reliable numerical model verified by experimental data to investigate the optimal use of SCDA in fragmentations of concrete based on the extended finite element method. The simulated results reveal that the minimum hole diameter is 26 mm required to break the concrete cube of 150 mm, and the crack process can be divided into three phases of initiation, propagation, and coalescence according to the energy release rate. Moreover, the proposed method is employed in simulating the crack process of meter-scale concrete blocks with two predrilled holes, and the optimal hole spacing of 350 mm is then determined. This study provides some insights for improving the efficiency of SCDA in the field applications.