波流荷载作用下风机混凝土高桩承台拉应力超限区分布研究  

Analysis on the Distribution of Over-limitation Zone of Tensile Stress of High-pile Cap under Wave-current Loads

作　　者：李炜 熊根 张俊臣 陆南辛 金超 LI Wei1, XIONG Gen1, ZHANG Junchen2, LU Nanxin1, JIN Chao2(1. PowerChina Huadong Engineering Corporation Limited, Hangzhou310014, Zhejiang, China; 2. Guodian Electric Power Zhejiang Zhoushan offshore Wind Power Development Co., Ltd., Hangzhou 310014, Zhejiang, China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州310014 [2]国电电力浙江舟山海上风电开发有限公司,浙江杭州310014

出　　处：《水力发电》2018年第9期102-105,共4页Water Power

基　　金：国家自然科学基金面上项目(51579227);国家自然科学基金青年科学基金项目(41206075)

摘　　要：采用有限元软件建立实体模型、壳单元模型和管单元模型,对不同波流荷载工况下高桩混凝土承台进行有限元分析,得到承台混凝土拉应力分布。通过对不同拉应力区间混凝土体积统计分析,得到高桩承台拉应力超限区混凝土的分布规律。结果表明:波流荷载使高桩承台混凝土拉应力极值增加,但是拉应力超限区减小,且超限混凝土的拉应力分布区间主要为低拉应力区,极值拉应力区间的混凝土很少。根据拉应力超限区混凝土分布规律,给出了高桩混凝土承台拉应力控制值参考标准,为实际施工提出有益建议。The solid element model, shell element model and pipe and shell element model are established by finite element software and the finite element analyses of high-pile concrete cap under different wave-current loads are carried out. The distribution of tensile stress is obtained. Through the statistical analysis of concrete volume under different tensile stress range,the distribution law of high-pile concrete cap in tensile stress over-limitation area is obtained. The results show that：（ a） the maximum stress of high-pile cap concrete is increased under the action of wave-current loads, but the over-limitation zone of tensile stress is decreased; and（ b） the tensile stress distribution range of over-limitation concrete is mainly located on low tensile stress zone, and the concrete in extreme tensile stress zone is very few. According to the distribution law of concrete in over-limitation zone of tensile stress, the reference standard of tensile stress control value of high-pile concrete cap is proposed,which is a useful reference to practical construction.

关 键 词：波流荷载 高桩承台基础 混凝土 应力分布 

分 类 号：TU473.1[建筑科学—结构工程]