Shear-wall Research On Temperature Effect And Thermal-bridge Effect

Thermal bridges of "一" and "L" shear wall of high-rise residential buildings, which was in three types of insulation, was analysised and researched in theory under static conduction. Temperature field, heat flux field, stress field and displacement field was included in simulating content.Temperature distribution and heat flux distribution of thermal bridges were simulated, then compared and analysised. it is found that: The corner of " L " shear wall and the boundary of thermal bridge easily leak heat, which is the main parts of heat loss, so heat treatment should be strengthened. After heat preservation, heat flux were significantly lower, so that achieved energy saving and well improved indoor thermal environment, Also external insulation is considered as the best way of the three ways, and suggested to adopt first.Temperature distribution and heat flux distribution of "一" and "L" thermal bridge in external insulation with different thickness were simulated, and heat transfer coefficient of main body structure was calculated, then curves were drawn to propose economical insulation thickness of thermal bridge. The goal of energy saving and economic benefit will be unified.Stress distribution and displacement distribution of "一" and "L" thermal bridge were simulated, then the biggest change positions of thermal bridges were found, and measures were taken to prevent the cracks of main body structure and prolong the service life. Compare and Analysis, it is showed that for external insulation can effectively reduce the thermal stress difference of thermal bridge surface, and internal insulation is more advantageous to filling wall, and can effectively reduce thermal stress difference of thermal bridge surface.This paper conducted a theoretical research of "一" and "L" thermal bridges in Xi'an .The conclusion can be provided as a reference of research and design.