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张拉膜结构的结构刚度及其对结构性能的影响*
张兰兰1,马冲2,曹原3,张营营3
摘 要

(1 江苏建筑职业技术学院建筑工程管理学院 , 徐州  221116; 2 山东金城建设有限公司, 淄博 255000;  3中国矿业大学力学与土木工程学院, 徐州 221116)

[摘要]张拉膜结构的力学性能与结构刚度密切相关。采用非线性有限元方法对开敞式鞍形膜结构的静力性能及自振特性进行了参数化分析,主要考虑了膜面预应力、矢跨比、弹性模量等对开敞式鞍形膜结构振动响应的影响规律,重点分析了结构刚度对于结构静力性能及自振特性的影响规律。研究发现:影响开敞式鞍形膜结构刚度的主要参数是膜面预应力、矢跨比和膜材弹性模量,其中预应力影响最大;膜结构的结构刚度可以分为非线性刚度和线性刚度,随着矢跨比的增大,膜结构由非线性体系向线性体系过渡,非线性刚度作用逐渐弱化,线性刚度逐渐强化。

[关键词]张拉膜结构; 结构刚度; 静力性能; 自振特性; 矢跨比

中图分类号:TU383文献标识码:A文章编号:1002-848X(2017)21-0025-05

 

Structural stiffness of tensioned membrane structure and its effect on the structure properties

Zhang Lanlan1, Ma Chong2, Cao Yuan3, Zhang Yingying

(1 College of Construction Management, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, China; 2 Shandong Goldencity Construction Co., Ltd.,  Zibo 255000, China; 3 School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China)

Abstract:The mechanical properties of tensioned membrane structures are closely related with the structural stiffness. The nonlinear finite element method was used to study the static behaviors and self vibration characteristics of open saddle membrane structures by parametric analysis, in which the effects of membrane surface prestress, rise-span ratio and elastic modulus were studied. The effect of structural stiffness on the structural static behaviors and self vibration characteristics were mainly investigated. The results show that the main factors that affect the structural stiffness of open saddle membrane structures are membrane prestress, rise-span ratio and elastic modulus, in which the effect of membrane prestress is the most significant.The structural stiffness can be divided into the nonlinear stiffness and the linear stiffness. With the rise-span ratio increasing, the membrane structures gradually changes from the nonlinear system to the linear system, which means the weakening of nonlinear stiffness and the strengthening of linear stiffness.

Keywords:tensioned membrane structure; structural stiffness; static behavior; vibration characteristic; rise\|span ratio

 

*国家自然科学基金项目(51308532),江苏建筑职业技术学院校级科研项目(JYA14-09),住建部科学技术项目(2017-K1-002)。

 

作者简介:张兰兰,硕士,讲师,Email:zhanglanlan007@163.com。

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