# [1]鲁正刚,王修信.桩支承混凝土底板约束收缩裂缝计算模型[J].东南大学学报(自然科学版),2016,46(2):386-391.[doi:10.3969/j.issn.1001-0505.2016.02.025] 　Lu Zhenggang,Wang Xiuxin.Calculation model for restrained shrinkage crack of pile-supported concrete foundation slabs[J].Journal of Southeast University (Natural Science Edition),2016,46(2):386-391.[doi:10.3969/j.issn.1001-0505.2016.02.025] 点击复制 桩支承混凝土底板约束收缩裂缝计算模型() 分享到： var jiathis_config = { data_track_clickback: true };

46

2016年第2期

386-391

2016-03-20

## 文章信息/Info

Title:
Calculation model for restrained shrinkage crack of pile-supported concrete foundation slabs

Author(s):
School of Civil Engineering, Southeast University, Nanjing 210096, China

Keywords:

TU375.2
DOI:
10.3969/j.issn.1001-0505.2016.02.025

Abstract:
In order to predict the restraint stress distribution and the dangerous zones of cracking caused by interior and exterior restraints,the calculation model for restrained shrinkage cracks of pile-supported concrete foundation slabs was established based on the direct stiffness method and the corresponding calculation procedure was compiled. Then, the rationality of parameter values in this model was verified by a numerical example. The parameter sensitivity was analyzed. The results show that the restraint shrinkage stresses are in proportion to the elasticity modulus and the undrained shear strength of the subsoil,the shrinkage strain of concrete and the reinforcement ratio of foundation slabs,while in inversely proportional to the effective width of the slabs. The restraint shrinkage stresses are more significantly affected by the shrinkage strain of concrete,the reinforcement ratio of foundation slabs and the elasticity modulus of the subsoil. Accordingly,some workable crack prevention measures are proposed.

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