Challenges in proof load test of bridges _ Malaysian experience

10th Malaysian Road Conference & Exhibition 2018

工业技术（总论）

Ku Mahamud, K.M.S.^1 ; Lim, C.C.^2 ; Ng, S.K.^1 ; Shahruddin, M.N.^1 ; Jamil, M.Q.^1

Evenfit Consult Sdn. Bhd., Kuala Lumpur, Malaysia^1

Jabatan Kerja Raya (JKR), Kuala Lumpur, Malaysia^2

关键词: Actual capacities;    Existing bridge;    Load ratings;    Malaysia;    Malaysians;    Medium term;    Theoretical calculations;    Weight restriction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/512/1/012009/pdf
DOI  :  10.1088/1757-899X/512/1/012009

学科分类：工业工程学

来源: IOP

【 摘 要 】

It is a known fact that theoretical calculation for assessing the capacity of an existing bridge is grossly underestimating its actual capacity. The reasons are, among others, the safety factors adopted and assumptions made in modelling. The recommended alternative approach to assess the actual capacity of the bridge is by performing a proof load test. Proof load test is a useful tool where a bridge is incrementally loaded to a final targeted load. This approach has been used to check the bridges in Sarawak for their compliance with Weight Restriction Order (WRO) 2003. In these tests, bridges with Evaluation Load Ratings (ELR), which fall short of Public Work Department Malaysia (JKR) requirement related to WRO 2003 and hence recommended for replacement, were proof load tested with the intention to preserve these bridges. This paper presents the experience in conducting the proof load test on a few bridges in Malaysia. It describes the methodology for the proof load tests and the challenges faced during the tests. The proof load tests showed that the tested bridges can carry the full JKR standard of Medium Term Assessment Load (MTAL) loading, which is well within the legal load limits allowed under WRO 2003.