基于指数模型的能源桩长期响应研究

doi:10.13722/j.cnki.jrme.2020.0588

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Abstract 基于荷载传递法，提出基于指数模型的能源桩长期响应分析方法。首先，通过引入改进的Masing准则来构建以指数模型为骨干曲线的土体加卸载函数，进而基于荷载传递法研究温度循环过程中能源桩的工作特性；然后通过与现场试验数据进行比较，验证该理论模型的合理性；最后结合算例，研究能源桩的长期工作特性。结果表明：(1) 温度循环方式对桩顶附加沉降有重要影响，相较于仅用于制冷模式的能源桩，冷热循环工况下的桩顶沉降更加明显；(2) 桩顶刚度系数越大，桩顶沉降越小，稳定的也越快；(3) 上部结构荷载较少时，随着温度循环的进行，桩身下部可能会产生拉应力；而上部荷载较大时，桩顶沉降随着桩身温度循环的增长而加快，并且沉降稳定时间逐步增长。

Key words：桩基础能源桩荷载传递法指数模型循环加卸载长期响应

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	Articles by authors
	DONG Longlong1
	WU Wenbing1
	2
	LIANG Rongzhu1
	2
	LIU Hao1
	2
	MEI Guoxiong1
	2
	YANG Zijian1

Cite this article:

DONG Longlong1,WU Wenbing1,2, et al. Long-term responses of energy piles based on exponential model[J]. , 2021, 40(3): 629-639.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0588 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I3/629

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