Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prestressed reinforced concrete beam transforming and reinforcing method
The invention discloses a prestressed reinforced concrete beam transforming and reinforcing method. A main beam in the vertical direction is supported through jacks and steel pipe columns; floor slabs are supported through steel pipe; concrete surface strain gauges and laser range finders are erected; the steel pipe columns are upwards loaded and jacked through the jacks; the column heads of original reinforced concrete frame columns are heightened; newly-added beams are additionally arranged on the tops of prestressed beams; prestressed steel bars or prestressed steel strands in the prestressed beams are cut off one by one; concrete at the bottom of the prestressed beams are removed and reduced; new bottom surface prestressed steel bars of the prestressed beams are recovered; a new bottom surface is repaired; the prestressed beams are reinforced, so that the stress performance of the prestressed beams is recovered; and the jacks are unloaded, the steel pipe columns and the steel pipes are removed. According to the method, the problems that the overall floor height is small and the clearance does not meet the use requirement due to the fact that the sections of the prestressed beams are high can be solved, it can be ensured that the prestressed beams with the reduced height can have good bearing capacity and stable service life, and the requirements for the overall floor height use function and the building safety level are met.
一种预应力钢筋混凝土梁改造加固方法，通过千斤顶和钢管柱对垂直方向主梁进行支撑；通过钢管对楼板进行支撑；架设混凝土表面应变计和激光测距仪；通过千斤顶向上加载顶起钢管柱；对原钢筋混凝土框架柱的柱头进行加高；在预应力梁的顶部增设新增梁；逐根截断预应力梁中的预应力筋或预应力钢绞线；拆除削减预应力梁底部的混凝土；恢复预应力梁新底面受力钢筋；修复新底面；加固预应力梁，使其受力性能恢复；千斤顶卸载、撤除钢管柱和钢管。该方法能够解决由于预应力梁截面较高引起的整体层高小、净空不满足使用要求的问题,并可确保削减高度后的预应力梁能够具有良好的承载能力和稳定的使用寿命，满足整体层高使用功能和建筑安全等级的要求。
Prestressed reinforced concrete beam transforming and reinforcing method
The invention discloses a prestressed reinforced concrete beam transforming and reinforcing method. A main beam in the vertical direction is supported through jacks and steel pipe columns; floor slabs are supported through steel pipe; concrete surface strain gauges and laser range finders are erected; the steel pipe columns are upwards loaded and jacked through the jacks; the column heads of original reinforced concrete frame columns are heightened; newly-added beams are additionally arranged on the tops of prestressed beams; prestressed steel bars or prestressed steel strands in the prestressed beams are cut off one by one; concrete at the bottom of the prestressed beams are removed and reduced; new bottom surface prestressed steel bars of the prestressed beams are recovered; a new bottom surface is repaired; the prestressed beams are reinforced, so that the stress performance of the prestressed beams is recovered; and the jacks are unloaded, the steel pipe columns and the steel pipes are removed. According to the method, the problems that the overall floor height is small and the clearance does not meet the use requirement due to the fact that the sections of the prestressed beams are high can be solved, it can be ensured that the prestressed beams with the reduced height can have good bearing capacity and stable service life, and the requirements for the overall floor height use function and the building safety level are met.
一种预应力钢筋混凝土梁改造加固方法，通过千斤顶和钢管柱对垂直方向主梁进行支撑；通过钢管对楼板进行支撑；架设混凝土表面应变计和激光测距仪；通过千斤顶向上加载顶起钢管柱；对原钢筋混凝土框架柱的柱头进行加高；在预应力梁的顶部增设新增梁；逐根截断预应力梁中的预应力筋或预应力钢绞线；拆除削减预应力梁底部的混凝土；恢复预应力梁新底面受力钢筋；修复新底面；加固预应力梁，使其受力性能恢复；千斤顶卸载、撤除钢管柱和钢管。该方法能够解决由于预应力梁截面较高引起的整体层高小、净空不满足使用要求的问题,并可确保削减高度后的预应力梁能够具有良好的承载能力和稳定的使用寿命，满足整体层高使用功能和建筑安全等级的要求。
Prestressed reinforced concrete beam transforming and reinforcing method
一种预应力钢筋混凝土梁改造加固方法
LI QINGTAO (Autor:in) / XIA HAORAN (Autor:in) / LIU PU (Autor:in) / ZHANG YANG (Autor:in) / CHEN JIANSHE (Autor:in) / CHAI YINGPENG (Autor:in) / SUN HUFEI (Autor:in) / QU LUYANG (Autor:in) / LIU MENG (Autor:in) / GUO ZONGKAI (Autor:in)
09.11.2021
Patent
Elektronische Ressource
Chinesisch
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